- arm-netbook - Mailman test

Re: [Arm-netbook] firefly 3399 all source software disclosed?
by ronwirring＠Safe-mail.net 02 Jun '17

02 Jun '17

-------- Original Message -------- From: Luke Kenneth Casson Leighton <lkcl(a)lkcl.net> Apparently from: arm-netbook-bounces(a)lists.phcomp.co.uk To: Eco-Conscious Computing <arm-netbook(a)lists.phcomp.co.uk> Subject: Re: [Arm-netbook] firefly 3399 all source software disclosed? Date: Wed, 31 May 2017 06:01:54 +0100 > --- > crowd-funded eco-conscious hardware: https://www.crowdsupply.com/eoma68 > > > On Tue, May 30, 2017 at 10:07 PM, <ronwirring(a)safe-mail.net> wrote: > > In a previous post, lkcl wrote the firefly rk3399 staff > > has the pcb cad files and he had no objection about firefly rejecting, > > which they have done towards me, to email the cad files. > > aiyaaa, you didn't ask them did you? it's their proprietary and confidential > business, and they're most likely under NDA with rockchip - please don't > do that, ron. > > > About lkcl's crowd funding, the mali gpu source code is > > not available. Lkcl can make the mali gpu source code > > not available, because he makes a reservation in the text in his ad. > > this is a rather confusing sentence-construction... ad... ad... ah, you > may be referring to the crowd-funding text as "advertising". that word > is reserved for businesses. this is *not* a business. > > > > About the pcb cad files, lkcl has decided they will not be > > available until lkcl decides to provide them. > > noooo, ron, most of the CAD files *are* available. the only ones that > are not are the EOMA68-A20 ones because i've invested literally tens > of thousands of dollars in their development, and if someone else goes > and clones them (particularly in china) before the project's properly > established it jeapordises the ENTIRE PROJECT. especially if they > fuck it up and get it wrong. I understand your arguments and why you made the decision. I was pointing out, that proper open source reasoning, in my opinion, would require that all data is provided. > > > > I disagree on the decision. > > tough. > > > Being open source I find it implicit that all data will be > > provided immediately. > > normally i would agree with you 100%. and in the case of the > housings those *are* 100% available. > > however in the case of the A20 PCB i have to make an exception > to not make them available *IMMEDIATELY*. > > let me be clear. they WILL be made available. is that clear? > > > > Because lkcl has made a reservation in his ad > > there is no advertising, ron. advertising is a tool utilised by > businesses. this is not a business. I have reflected on that. What I write now is not directed against you or your crowd funding. It is in general about crowd funding. It seems crowd funding is some form of workaround about buying an item. I have no knowledge about court decisions in this field. I could imagine due to consumer law, a court would rule it a common purchase. Meaning consumer rights would apply. > > > about the cad files in question he can make that choice. > > > > In the firefly rk3399' ad it says, the hardware is open source. > > that means that the software is available under libre licenses. it > does not mean that the *CAD* files for the *hardware* are available. > > > The ad is misleading and deceptive. > > ron, i do notice that you are often confused by the use of words that > potentially have multiple meanings, or that you sometimes > cross-associate words. > > in this case however you would be correct, there is the possibility > of thinking that "open source" applies *to* the hardware CAD files. > > however if they meant that, they would have used the words "open > hardware" or "libre hardware". I disagree. Firefly writes "open source hardware platform". I find my interpretation legitimate. You are not backing up your interpretation with arguments. My argument is, they say it is open source. Then everything has to be open source if no reservations are stated. > > it's a common enough mistake. > > > I have found no reservations about the mali gpu > > source code or the pcb cad files. Firefly can probably > > not email the mali gpu source code, because they do > > not have it. > > that's correct. you'd be asking them for something they don't have, > and are not legally obligated to provide even if they did. That is debatable. > > > They can email the pcb cad files because they have them. > > ron: they are in absolutely no way obligated to you to provide them. > they've used the right words, and it is *you* who is confused by their > choice of words. Again debatable. > > > > That is why I am going to demand both the mali gpu > > source code and the pcb cad files from firefly. > > ron please don't do that. you will only harm the reputation of the > free software community by doing so. I do not believe playing nice with the manufacturers will show a great rate of successes. Rather if big numbers of people would coordinated act like I do, some impact might show. There is no reason to not try both path simultaneous. Some people play nice. Other make demands. > > > If firefly does not provide the data in question, > > then I will file a complaint to kickstarter. It is unacceptable calling something open source, if it is not all open source. > > that's down to confusion on your part about wording, and it is their > choice and right as a proprietary business what they choose to release > and do not choose to release. > > you have *no right* to tell them that they *have* to release the > source code. that is down to them to learn the consequences of their > decisions. > > > > Of cource I will not mention lkcl in any form. > > don't do it, ron. you'll cause damage to the reputation of the > entire free software community, lessening the chances of companies > like Acer from wanting to work with us. You have a tendency to magnify the impact of one persons actions. Do you actually believe, that me writing manufacturers and making demands, right or wrong demands, has any impact on the situation of libre software? Do you think acer in any way takes notice? No. If half a million people in a short period of time hammered acer with demands, then there might be some impact. Previously you told me, that putting pressure on manufacturers should be done. Then I discarded what you said. I have reached to another point of view. Maybe coordinated campaigns, which are not being done now, might show some results. It can mobilize libre software people. Getting the power to have a say against manufacturers. > > l. > > _______________________________________________ > arm-netbook mailing list arm-netbook(a)lists.phcomp.co.uk > http://lists.phcomp.co.uk/mailman/listinfo/arm-netbook > Send large attachments to arm-netbook(a)files.phcomp.co.uk

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intel pc card
by ronwirring＠Safe-mail.net 01 Jun '17

01 Jun '17

Intel has made a pc card. https://www.youtube.com/watch?v=jlBtqeNykEc Probably intel will allow only intel inside pc cards. Even more they will maybe build in mechanisms to stop peripheral electronics from accept non intel pc cards. If the intel pc card peripherals get a marked and they can be modified to run with lkcl's pc cards, that could be a gain for his pc cards.

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Re: [Arm-netbook] modifying a 7 inch notebook cabinet to accept apccard
by ronwirring＠Safe-mail.net 31 May '17

31 May '17

-------- Original Message -------- From: Christopher Havel <laserhawk64(a)gmail.com> Apparently from: arm-netbook-bounces(a)lists.phcomp.co.uk To: Eco-Conscious Computing <arm-netbook(a)lists.phcomp.co.uk> Subject: Re: [Arm-netbook] modifying a 7 inch notebook cabinet to accept apccard Date: Fri, 26 May 2017 12:34:18 -0400 > You use the Arduino IDE to program Teensies, IIRC. They might also have > their own. Code is uploaded directly to a USB port on the Teensy. Have a > look around --> https://www.pjrc.com/teensy/ > > You *probably* need a Teensy++ 2.0. That is not a guarantee, just a 1 teensy for the keyboard and 1 teensy for the touchpad? Are there not simpler microcontrollers? > recommendation. I have not myself played around with Teensies, they're > expensive (relative to Arduino Nano/Micro clones on eBay, and to my typical > budget) and I tend to think in hardware terms far better than anything > software/firmware. I can't really help you beyond what I've just written. > > The computer doesn't 'see' keymapping. The computer sees a string of > information that tells it what key was depressed and released and when. > "Keymap" is where the key is in the matrix, which the computer doesn't care > about. The computer cares that you pressed the ESC key and released it x > number of microseconds later, not that it's row 1, column 1 in the matrix. > It seems to be too complicated. > You should look up the USB HID protocol and the PS/2 keyboard protocol. > Those will tell you a lot of how the computer 'sees' and 'talks to' a > keyboard... and how the keyboard 'talks' back. > > On Fri, May 26, 2017 at 12:27 PM, <ronwirring(a)safe-mail.net> wrote: > > > -------- Original Message -------- > > From: Christopher Havel <laserhawk64(a)gmail.com> > > Apparently from: arm-netbook-bounces(a)lists.phcomp.co.uk > > To: Eco-Conscious Computing <arm-netbook(a)lists.phcomp.co.uk> > > Subject: Re: [Arm-netbook] modifying a 7 inch notebook cabinet to accept > > apc card > > Date: Thu, 25 May 2017 17:40:52 -0400 > > > > > > > Keyboard is easy if you know a little electronics. A laptop keyboard is > > a matrix keypad. Rows and columns. One key connects one row to one column. > > > > > > Look up a little thing called the "Teensy" -- it is a microcontroller > > board. You can (if you are very good at soldering) connect from the > > keyboard's PCB connector (cut the > > > > > > Can the teensy make the key mapping correct and the key mapping will be > > correct when arriving at the computer's usb port? > > > > PCB and solder to the connector while it's still on there -- no shorts, > > mind you, or it won't work, and the pin pitch is usually insane...) to a > > Teensy and make a "custom keyboard" that way. You will of course have to > > program the Teensy but that's the easy part ;) an Arduino Leonardo clone > > from eBay (also try to find, if you still can, > > > > > > Can you use a raspberry pi 0 to program a teensy? > > > > > > "Arduino Micro" clones -- NOT the "Pro Micro" ones, they won't have enough > > pins). Same code will run there and work just fine. > > > > > > Forget the battery, unless you have a reflow toaster oven (or other > > homemade reflow equipment, or access to the professional gear) -- you will > > need it for the kinds of chips that let computers talk to batteries, AFAIK. > > Too much trouble. > > > > > > I am designing, for a competition on Hackaday, a "made from common > > modules" "laptop" that I'm calling the AnyTop. The goal is that anyone can > > build it if they can use a screwdriver, knife, and some sort of drill. (The > > drill is only needed in one place.) It won't have a battery... but it will > > be a laptop form factor and it will work. Luke, would some discussion of > > this be on-topic? > > > > > > > _______________________________________________ > > arm-netbook mailing list arm-netbook(a)lists.phcomp.co.uk > > http://lists.phcomp.co.uk/mailman/listinfo/arm-netbook > > Send large attachments to arm-netbook(a)files.phcomp.co.uk > > > _______________________________________________ > arm-netbook mailing list arm-netbook(a)lists.phcomp.co.uk > http://lists.phcomp.co.uk/mailman/listinfo/arm-netbook > Send large attachments to arm-netbook(a)files.phcomp.co.uk

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Re: [Arm-netbook] usb keyboard, width about 15cm?
by ronwirring＠Safe-mail.net 31 May '17

31 May '17

-------- Original Message -------- From: Nick Bannon <nick-eoma68(a)rcpt.to> Apparently from: arm-netbook-bounces(a)lists.phcomp.co.uk To: arm-netbook(a)lists.phcomp.co.uk Subject: Re: [Arm-netbook] usb keyboard, width about 15cm? Date: Wed, 31 May 2017 12:21:34 +0800 > On Mon, May 29, 2017 at 04:48:03PM -0400, ronwirring(a)Safe-mail.net wrote: > > http://usb.brando.com/prod_detail.php?prod_id=00666 > > Promising! but as Christopher mentioned, "This item is Discontinued". > > I had luck searching for another 56 key keyboard ("50%"?): USD $23.73 Good find. It looks to be the same keyboard. > > http://www.dx.com/p/mini-56-key-usb-keyboard-with-retractable-usb-cable-for… > http://www.dx.com/p/15953 > http://www.dx.com/c/computers-tablets-networking-399/keyboards-302/USB-351 > > The X/Y dimensions are very similar, though it's 60% heavier and 5mm thicker. > Dimensions: 6.69 in x 2.91 in x 0.79 in (170 x 74 x 20 mm) > Weight: 6.53 oz (185g) > > I think I'd miss the dedicated arrow keys. > I'd like it even more if it had an integrated trackball or trackpoint, That would make it much easier to integrate it in a pc card cabinet. I have searched for wired usb touchpads and trackpoints. I have not found any. > which I guess requires a USB hub device/emulation as well?: > https://en.wikipedia.org/wiki/Pointing_stick > > Nick. > I have bought one 7usd bluetooth small keyboard. It appears to have a touchpad too. I cannot say how difficult it will be to modify it to a wired usb keyboard. There is the https://pyra-handheld.com/boards/images/Pyra-Main.png cabinet. If the 3d printer cad files are free software. > -- > Nick Bannon | "I made this letter longer than usual because > nick-sig(a)rcpt.to | I lack the time to make it shorter." - Pascal > > _______________________________________________ > arm-netbook mailing list arm-netbook(a)lists.phcomp.co.uk > http://lists.phcomp.co.uk/mailman/listinfo/arm-netbook > Send large attachments to arm-netbook(a)files.phcomp.co.uk

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Re: [Arm-netbook] firefly 3399 all source software disclosed?
by ronwirring＠Safe-mail.net 31 May '17

31 May '17

-------- Original Message -------- From: Luke Kenneth Casson Leighton <lkcl(a)lkcl.net> Apparently from: arm-netbook-bounces(a)lists.phcomp.co.uk To: Eco-Conscious Computing <arm-netbook(a)lists.phcomp.co.uk> Subject: Re: [Arm-netbook] firefly 3399 all source software disclosed? Date: Wed, 31 May 2017 06:15:57 +0100 > ron: what you're about to attempt is called "coercion". it's > unethical. the principles behind the libre concept are that ethics > come first: very few people in the libre world actually truly > understand that, because they think it's about the technology or about > the "four freedoms" as specifically defined and laid out. > > people need to be free to make their own choices. firefly (Acer) have > made their choice - as they are entirely at liberty to do - to release > the full source code of the SOFTWARE and NOT the hardware. > > if you attempt to coerce them into doing something that they have not > themselves chosen to do, they will not react as you intend, i > guarantee it. > > so please don't do it: it's unethical. > > l. > It is not common to debate strategy on a public mailing list. Because this is a minor matter and I do not believe I will get the data I want from firefly no matter what, I will tell what I wanted to do. I believe their kickstarter webpage is misleading and deceptive. They write the hardware is open source. Likely it is not legally established what defines open source hardware. I would say every piece of data and software about the computer has to be open source. It is about what the buyer of an item reasonably can expect. Not what seller decides by himself. To my knowledge seller has made no reservations on kickstarter. Then I say, he has to hand over what data seller has. They are supposed to be professionals. If they screw up in their ad, it is their problem. Arguments saying it is their data and business platform are not relevant. I am located in eu. Firefly is located in china. If firefly will not hand over the data I want, I will have to sue them in china or usa, if that is where kickstarter is located. I am not going to do that. If firefly refuses to provide the data, I am going to file a complaint to kickstarter about firefly. I tried to get the data. Wrote them and see what happens. Maybe firefly by mistake would provide the data. Did I believe it would work? No. https://youtu.be/6o_mVPwHYnk?t=1007 You may call it coercion and unethical. I do it anyway. Because I am weighing it up against my privacy and computer security. I cannot buy new libre software computers which have all devices enabled. > _______________________________________________ > arm-netbook mailing list arm-netbook(a)lists.phcomp.co.uk > http://lists.phcomp.co.uk/mailman/listinfo/arm-netbook > Send large attachments to arm-netbook(a)files.phcomp.co.uk

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Re: [Arm-netbook] firefly 3399 all source software disclosed?
by ronwirring＠Safe-mail.net 31 May '17

31 May '17

In a previous post, lkcl wrote the firefly rk3399 staff has the pcb cad files and he had no objection about firefly rejecting, which they have done towards me, to email the cad files. About lkcl's crowd funding, the mali gpu source code is not available. Lkcl can make the mali gpu source code not available, because he makes a reservation in the text in his ad. About the pcb cad files, lkcl has decided they will not be available until lkcl decides to provide them. I disagree on the decision. Being open source I find it implicit that all data will be provided immediately. Because lkcl has made a reservation in his ad about the cad files in question he can make that choice. In the firefly rk3399' ad it says, the hardware is open source. The ad is misleading and deceptive. I have found no reservations about the mali gpu source code or the pcb cad files. Firefly can probably not email the mali gpu source code, because they do not have it. They can email the pcb cad files because they have them. That is why I am going to demand both the mali gpu source code and the pcb cad files from firefly. If firefly does not provide the data in question, then I will file a complaint to kickstarter. It is unacceptable calling something open source, if it is not all open source. Of cource I will not mention lkcl in any form. -------- Original Message -------- From: Luke Kenneth Casson Leighton <lkcl(a)lkcl.net> Apparently from: arm-netbook-bounces(a)lists.phcomp.co.uk To: Eco-Conscious Computing <arm-netbook(a)lists.phcomp.co.uk> Subject: Re: [Arm-netbook] firefly 3399 all source software disclosed? Date: Tue, 30 May 2017 03:19:57 +0100 > --- > crowd-funded eco-conscious hardware: https://www.crowdsupply.com/eoma68 > > > On Mon, May 29, 2017 at 10:12 PM, David Niklas <doark(a)mail.com> wrote: > > On Mon, 8 May 2017 05:45:36 +0100 > > Luke Kenneth Casson Leighton <lkcl(a)lkcl.net> wrote: > >> --- > >> crowd-funded eco-conscious hardware: https://www.crowdsupply.com/eoma68 > >> > >> > >> On Sun, May 7, 2017 at 10:10 PM, zap <zapper(a)openmailbox.org> wrote: > >> > > >> > > >> > On 05/07/2017 04:29 PM, ronwirring(a)Safe-mail.net wrote: > >> >> All software for the mali-t860 is open source? > >> > >> none. MALI is proprietary. > > > > I'm confused. > > Luke, if you plan on making an RK3399 into an eoma project how can you > > get RYF status if the mali GPU is closed source? > > this was discussed a year ago or so. same process as for the EOMA68-A20 > > > For that matter, how can you get RYF cert. for your current eoma68 > > project? > > by leaving out the proprietary crap, simple as that. see below. > > > Unless I'm mistaken and it uses a different GPU? > > it is actually a different GPU but that does not change the > assessment process carried out by the FSF. > > > Or you just leave the HW crippled? > > if the FSF considered the device to be "crippled" by it not having > the 3D engine running, such that there was a genuine risk that people > would actively seek out the installation of proprietary software. > > in the case of e.g. a proprietary on-board WIFI device that *would* > constitute a genuine risk of people *actively* seeking out proprietary > firmware, and consequently the FSF quite naturally refuses to certify > devices that contain non-removable proprietary on-board WIFI chips. > > however in this case it actually turns out that if you use the > proprietary 3D GPU for the tasks that i suspect you *believe* will > quotes accelerate quotes certain operations (such as X11), the MALI > embedded GPU (or its associated proprietary software - we can't > actually tell which because we DON'T HAVE THE DAMN SOURCE) is so > piss-poor at its job that it actually SLOWS DOWN CERTAIN OPERATIONS of > X11. > > given that 2D acceleration is already covered by fbturbo, and works > really well *and is entirely libre software*, the *need* for the 3D > engine just for basic Small-Office / Home-Office and day-to-day usage > is NOT A CONCERN. > > so does that make it clear that the evaluation process (which was > described a year ago) is not just a hard-and-fixed process? > > now, if on the other hand this was a dedicated Games Console product, > *that would be an entirely different matter*. applying for RYF > Certification on a 3D Games Console product which has a 3D GPU which > *only works with proprietary software* would probably constitute too > much of a risk that buyers *WOULD* in fact go out of their way to > download the proprietary drivers. > > but this design *isn't being sold as a 3D Games Console*, is it? > > does that help clarify? > > l. > > _______________________________________________ > arm-netbook mailing list arm-netbook(a)lists.phcomp.co.uk > http://lists.phcomp.co.uk/mailman/listinfo/arm-netbook > Send large attachments to arm-netbook(a)files.phcomp.co.uk

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Re: [Arm-netbook] Totally derailed topic
by David Niklas 31 May '17

31 May '17

On Tue, 9 May 2017 20:14:36 -0400 John Luke Gibson <eaterjolly(a)gmail.com> wrote: > On 5/9/17, Lyberta <lyberta(a)lyberta.net> wrote: > > doark(a)mail.com: > >> I think you're caught in the same trap, unable to realize your own > >> potential for lack of a moral standard (it also suffers as a result > >> of an Atheistic philosophy), and unable to accept a pointless > >> existence. > > > > When I was 19, I was in a very bad situation. Everything I've ever > > believed in was false. So I've spent the next 6 months looking for > > truth. Thankfully, I have dropped out of college by this time so I had > > time to investigate. Investigation is a good idea. If I may what college? What were you planning to major in? > > And in one moment it dawned upon me. There is no truth. Everything is > > relative. People invent their own truth and start believing in it. So > > if I want to stay unshackled I must not believe in anything. Think of a pendulum, now compare with what you just wrote............. The solution to your problem is not to "believe" or not to "believe" (belief is actually a REQUIREMENT of live since we could not decide about anything that is uncertain with out it). If you walk up to a person how do you tell whether or not they speak English well? Whether they can use big words? Do you start with something extremely simple or not? Or, for another example, Luke did not know whether or not he would succeed in completing the eoma68, or if it would be on time. He tries his best, but he still does not know if that is good enough. > > The next thing was supposed to be suicide but I couldn't do it. I > > don't know the future and I don't know what will happen when I die. > > In fact, I'm trapped inside my own consciousness and by definition > > can't escape it and see the truth. Remember Plato's allegory of the > > cave? This is one of the last things you'll learn in philosophy. > > Another thing that bugs me is, since I don't believe in anything, I > > also don't believe in science. I can't predict what's gonna happen in > > the next moment. Every once in a while I get in this state of mind > > where I understand that I understand nothing. Nonsense, we are in an action-reaction universe, observe the actions and you aught to be able to determine the reactions. > >> In any and all cases I think you might enjoy a book that is > >> eyeopening, insightful and uplifting, with respect to the world > >> around you, as opposed to your more dreary, despairing, world view. > > > > I was forced to read books at school and this gave a huge hatred for > > them. I remember I've tried to read a fiction book at psychiatric > > hospital and after the 1st paragraph I was so enraged that I quickly > > put it away. Though this mostly applies to fiction. > > Ouch! I had the identical experience, but I took the opportunity to read a nasty book to record all it's mistakes, thus I not only learned about the stupid things people write about but I am quite able to refute them. I always thought that fiction aught to reflect reality, to bring out what is. Spoke to my mother about you, see suggested watching a TV program on EWTN (not that I watch EWTN but maybe it would heklp...) God the universe and everything By Matt Fradd On June 18 12:00 AM (EST?) > > The mountains of religious thought pumped into this thread has it > visibly oozing (I mean no offense). Ooh, it's coming to get you :) > Firstly, the speaker in that video > linked @zap I'm familiar with and is very unreliable when their claims > are checked or researched. Secondly, Nietzsche explores that so-called > "trap". The thing is that religion presents the concept of morality > which fills the space created by ennui and lack of obstacles to > self-preservation. Noam Chomsky popularized abit the thought that the > consistent trend in nature is more intelligent species tend to go > extinct after a shorter period than obviously less intelligent ones > (i.e. beetles), this is due to genetic drift and inbred weaknesses due > to a lack of obstacles to their survival. Ethics is an artificial > obstacle we present ourselves in order to keep us strong (Nietzsche > referred to the model used by Christianity as Slave Morality, > suggesting that the ethics therein enslave the subscriber to the whims > and desires of the less fortunate, and thusly purporting the existence > of less fortunate as ENDEMICALLY NECESSARY because without less > fortunate people then there would be point to the ethics of > christianity and therefore there would be no obstacle to occupy > ourselves with and therefore genetic drift would set in and we would > die as a species. In other words, Nietzsche considered christianity so > obsessed with compassion, that in a world without suffering it would > utterly and completely fall apart.). > So people like Lyberta are causing genetic impurity and aught to be? > Nietzsche's life's work was dedicated to attempting to create a > well-developed replacement to both religion and "Slave Morality". > > I don't know if I support Nietzsche's alternative of "Master Morality" Then what do you support? > (where the obstacle is to become the best human possible, the > so-called "ubermensch"), but I do say that "trap" is hardly a "trap" > rather it's just a human need for an obstacle or conflict, and by > rejecting religion all one is doing is rejecting the type of conflict > which that religion endorses. <snip> How about inherent insufficiency? Or you can just <--insert favourite word-->. the very best, David

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Re: [Arm-netbook] Existential 3D Printing Moments
by doark＠mail.com 31 May '17

31 May '17

On Fri, 19 May 2017 01:42:52 +0100 Luke Kenneth Casson Leighton <lkcl(a)lkcl.net> wrote: > > On Fri, May 19, 2017 at 12:35 AM, Neil Jansen <njansen1(a)gmail.com> > wrote: <snip> > now, neil, this is the kind of speed at which an arduino 2560 *cannot > cope*, and, also, where the design flaws inherent in RAMPS - using > prototyping Evaluation Boards (polulu-style drivers) - start to show > up. Could you be more specific? Why can't the arduino cope? > david crocket (dc42) has specifically designed the duet series so that > you can consider exceeding PWM rates of 150 khz, which is what you > need if you want to sustain 500mm/sec for example (and do not want > problems to occur at speeds well below that). Link? > also i forgot to mention that i've been using the E3Dv6 "volcano" > which, when you use a 0.5 to 0.8mm nozzle can easily do flow rates of > something mad like.... 200c^3/min - particularly when combined with > the huge 40:1 gearing of the flex3drive which can *accurately* deliver > the kinds of torque needed. the volcano basically turns the heat > chamber round, so that the heat area is 20mm long instead of the usual > 10mm. Torque for what? Again, maybe a link would help us stay on the same page. > none of this stuff i knew about, the 18 months before i began > designing the laptop's parts. oh well. I researched 3D printers thoroughly before I bought mine. I even started asking questions at a forum, and I'm still not too certain if I got what I sought. According to this list, I did worse when looking for hacker boards. So, you are not alone. <snip> > welcome to the list neil. really good talking with you. > > l. Indeed. Sincerely, David

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Re: [Arm-netbook] Side-Topic: Liberating PocketCHIP
by David Niklas 31 May '17

31 May '17

On Mon, 8 May 2017 16:38:22 +0100 Luke Kenneth Casson Leighton <lkcl(a)lkcl.net> wrote: > On Mon, May 8, 2017 at 4:23 PM, <ronwirring(a)safe-mail.net> wrote: > > > Is it common to do something like this against a person? > > in the unethical business world? of course it is! mostly you don't > get to hear about it, but software libre developers are different. > they're not beholden to anyone, they're not corporate slaves, they're > not controlled and they are entitled to speak their mind. > > consequently they get attacked. especially if some fucker deems that > their "profit" is threatened. > > for example: there was some discussion back in 1999 as to whether > microsoft would ever take out a contract on my life, when i was doing > the reverse-engineering of NT domains. consequently i decided that > the research that i was doing had best be presented responsibly to > them as "security vulnerabilities", presented PRIVATELY to them (as a > responsible security researcher does) and only later disclosing them > if they didn't fix the problems in a reasonable timeframe. > > and that's why ISS hired me. the strategy that i deployed worked. > one microsoft employee actually called ISS up asking them to fire me. > ISS declined, pointing out that i was quite likely to get very pissed > off, and would they prefer me inside pissing out or outside pissing > in? they're absolutely right: i would have worked really really hard > to release one devastating public zero-day security vulnerability - > with full exploit code - every few days for several months, if they'd > fucked with me. <snip> I am just a tad confused. 1. You started a reverse engineering project on NT domains. 2. You presented your success to MS as a security problem. 3. You were hired. 4. Someone in MS complained. So, the FLOSS folks never saw your work anyway? Thanks, David

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Re: [Arm-netbook] a designing a low-cost decent 3d printing board
by David Niklas 31 May '17

31 May '17

On Tue, 23 May 2017 02:27:24 +0100 Luke Kenneth Casson Leighton <lkcl(a)lkcl.net> wrote: <snip> > in particular i would very much like to "stack" the steppers because i > have a design where it is going to use *four* z-axes. in a first > iteration those may be wired up as 2x 2-serial in parallel, however it > would be very *very* nice to be able to just add a second "stack" of 4 > z-axis steppers and use them to do automatic bed-levelling. so to do > that it would mean having on-board jumpers that could select > alternative GPIO pins... or maybe to use an I2C-based or SPI-based > GPIO expander in order to reduce the amount of GPIO needed. <snip> Remember that as the weight and speed of the hot end increases the load on the z-axis motors and gears also increases (if temporarily), leading to (temporary), inaccuracies when using multi motor setups. If I were to use multiple motors I'd not do it like this: M == motor H == Hot end TOP SIDE M----M +-----+ | | |H | |H | -> | | M----M M-----M But rather like this: TOP SIDE +----+ M----+ | | H | | | -> | | M----+ M----+ Assuming I understand you rightly. Sincerely, David

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Re: [Arm-netbook] usb keyboard, width about 15cm?
by ronwirring＠Safe-mail.net 31 May '17

31 May '17

-------- Original Message -------- From: Christopher Havel <laserhawk64(a)gmail.com> Apparently from: arm-netbook-bounces(a)lists.phcomp.co.uk To: Eco-Conscious Computing <arm-netbook(a)lists.phcomp.co.uk> Subject: Re: [Arm-netbook] usb keyboard, width about 15cm? Date: Sat, 27 May 2017 13:10:26 -0400 > The Bluetooth keyboards are Bluetooth only. > > Wired USB keyboard, that size? Never seen one. Would love to have one http://usb.brando.com/prod_detail.php?prod_id=00666 > myself; I've wanted to homebrew a waist-pack PC with wrist keyboard and > "google glass" style screen, since approximately a half hour after the dawn > of time. I've even got a viewfinder CRT out of an old camcorder that I > could use as the display if I hooked it up right. Trouble is I don't trust > BT to not interfere with everyone else and screw me up too... that, and I'd > need to make it work with a battery. > > Now that I think about it... I think I've seen one such keyboard literally > once ever, either by luck on eBay or on some other website. Don't remember > since it was at least five years ago. The thing commanded a princely sum, > too... like $150. > > It occurs to me as well that you might be able to get an > industrial/commercial duty wrist PC off eBay (be prepared to pay multiple > hundreds of dollars) and doof around with its built-in keyboard... or do > something with part of a cell phone and a Teensy... but that's real > jerry-rigging at best. There are also keyboards floating around for old > IPAQ PDAs that may be useful somehow... but you'd have to reverse-engineer > them and they look like they'd be horrible to use to begin with, you don't > even get most PC function keys (TAB, CTRL, ALT, etc). > > Good luck, and let me know if you find one... > _______________________________________________ > arm-netbook mailing list arm-netbook(a)lists.phcomp.co.uk > http://lists.phcomp.co.uk/mailman/listinfo/arm-netbook > Send large attachments to arm-netbook(a)files.phcomp.co.uk

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Re: [Arm-netbook] Side-Topic: Liberating PocketCHIP
by David Niklas 30 May '17

30 May '17

On Mon, 08 May 2017 09:59:50 +0100 "mike.valk(a)gmail.com" <mike.valk(a)gmail.com> wrote: > 2017-05-08 3:34 GMT+02:00 <doark(a)mail.com>: > > > I apologize for DOS'ing the list, I can only get online about once a > > week. > > > > On Thu, 4 May 2017 17:13:23 +0200 > > "mike.valk(a)gmail.com" <mike.valk(a)gmail.com> wrote: > > > > > > 2017-05-04 9:04 GMT+02:00 John Luke Gibson <eaterjolly(a)gmail.com>: > > > > > > > Since it seems like a trivially simple task that for some reason > > > > no one has taken up, I would like to take the opportunity to > > > > exercise a learning experience and simultaneously benefit the > > > > community, by liberating PocketCHIP by deblobbing the source and > > > > re-compiling. > > > > > > The PocketCHIP is powered by their SoM: > > > http://linux-sunxi.org/NextThingCo_CHIP > > > > > > That is apparently a Allwinner R8 pared with an external rtl8723bs > > > Wifi/BT chip. > > > > > > The R8 is a rebranded A13. > > What? I own one of those and I'm almost certain that the CPU is an A7. > > Let's boot the PocketCHIP up... > > The processor is detected as an A7. > > > > It should be a Cortex-A8. > http://linux-sunxi.org/Allwinner_SoC_Family > > The new chip GR8, which is specific SoC for NextThingCo, seems to be an > "sun5i" as well. Also a slightly modified A13 I guess. > > The're seems to but mainline support for it. Icenowy Zheng has addid it > I think. But the'res no wiki page fo it. > http://linux-sunxi.org/Linux_mainlining_effort > http://linux-sunxi.org/GR8 Sorry, I (foolishly) though that ARMv7 == A7 (i.e. a contraction). > > > I'll attach the output, it would probably be interesting to see all of > > it... > > Done, it's compressed bzip2 since it's ~300KiB decompressed which is > > large for an email. > > > > Use pastebin or sorts. Or just cut out the specifica part. > Sorry, I thought the rest of it might be useful to look at. <snip> > > You're not giving us enough details. Who is Verhaegen? What did he > > burn out on? > > When I first considered purchasing a PocketCHiP I read about the GPU > > not having 3D capabilities because of a binary blob. So, the CHIP > > folks hired (I think it was an extended goal of the kickstarter > > campaign), a kernel dev to add support to the Linux kernel for the > > GPU. > > > That did not happen. The're is no Opensource linux driver for MALI. NTC > hardly involves itself with the linux-sunxi community. > > Their website is hardly obvious to the software needs of running their > hardware. > > How hard can it be.... > > "To use our hardware you have two options: Our BSP which has closed > source drivers, but you have full utilization of the hardware. Or use > the mainline kernel with some restrictions" Where is that quote from? > And state your involvement in freeing the hardware or not. > > NTC website is just one big selling machine. > Prior to purchasing the Pocket CHIP I read their docs and kickstarter page. See this (their kickstarter page says similar): https://docs.getchip.com/chip.html#is-chip-open-source-where-are-the-docs Are they flat out lying? Thanks, David

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Re: [Arm-netbook] firefly 3399 all source software disclosed?
by David Niklas 30 May '17

30 May '17

On Mon, 8 May 2017 05:45:36 +0100 Luke Kenneth Casson Leighton <lkcl(a)lkcl.net> wrote: > --- > crowd-funded eco-conscious hardware: https://www.crowdsupply.com/eoma68 > > > On Sun, May 7, 2017 at 10:10 PM, zap <zapper(a)openmailbox.org> wrote: > > > > > > On 05/07/2017 04:29 PM, ronwirring(a)Safe-mail.net wrote: > >> All software for the mali-t860 is open source? > > none. MALI is proprietary. I'm confused. Luke, if you plan on making an RK3399 into an eoma project how can you get RYF status if the mali GPU is closed source? For that matter, how can you get RYF cert. for your current eoma68 project? Unless I'm mistaken and it uses a different GPU? Or you just leave the HW crippled? Thanks, David

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Re: [Arm-netbook] rk3399 what full schematics does lkcl want?
by David Niklas 30 May '17

30 May '17

On Fri, 19 May 2017 18:17:16 +0100 Luke Kenneth Casson Leighton <lkcl(a)lkcl.net> wrote: > --- > crowd-funded eco-conscious hardware: https://www.crowdsupply.com/eoma68 > > > On Fri, May 19, 2017 at 4:49 PM, <ronwirring(a)safe-mail.net> wrote: <snip> > > Because a license prohibits it? > > no. > > > Because competitors can use them? > > correct. > > > Lkcl, have you asked tfirefly to give you the full schematics cad > > data? > > no... because they would think i was a bit dumb. or worse, wanted to > steal their business. i have no desire to piss them off. > > > > Because I got to think, you said tfirefly is withholding some > > schematics, > > no i did not say that. it may be true but i would not have > specifically said it. i may have said that *rockchip* has *not made > available the reference design* which is a totally different matter. > > you may have then thought "rockchip equals firefly". > > please try not to make cross-connections and/or correlations that > aren't actually the case. > > > > I wrote tfirefly asking them to email me the full schematics. > > Tfirefly never denied, that they had not made the full schematics > > public. They said, they could not disclose the full schematics. Maybe > > due to a lack of english skills on both sides. > > no, you've just misunderstood their business model. please don't ask > them again, it's not fair to ask them to make public something which > will destroy their business model. > > > > Then what should you ask tfirefly for? Full schematics cad data? > > absolutely nothing. you don't ask them for anything. they're a > third party business - an OEM. > > and we also can't ask rockchip either, because we're not going to > order a million of their processors, cash up-front... *until* they > have made full CAD data available. > > classic catch 22 situation. > > so instead we wait - as i specifically, specifically said - until > rockchip's Reference Designs leak out onto the public internet and are > available on e.g. taobao or other site, for sale for $25. > > l. So, how did the t-firefly group create their SOC if they could not get the CAD files? Thanks, David

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molex 12v 5v 2a power supply together with 3 way usb otg host charger cable
by ronwirring＠Safe-mail.net 30 May '17

30 May '17

https://www.amazon.com/Coolerguys-100-240v-Molex-Power-Adapter/dp/B000MGG6S… Can you power supply the pc card with the 5v 2a part of the power supply in combination with the 3 way usb otg host charger cable? Thank you.

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Re: [Arm-netbook] first prototype microdesktop casework
by David Niklas 30 May '17

30 May '17

On Mon, 8 May 2017 18:51:21 +0100 Luke Kenneth Casson Leighton <lkcl(a)lkcl.net> wrote: > > On Mon, May 8, 2017 at 2:07 AM, <doark(a)mail.com> wrote: > > > I own a Reach3D printer. It's an all aluminum housing and z axis gear > > printer. I'm still in the construction phase, but if me and my caliper > > (it's auto-calibrating but I want it perfect :) work well together > > then I should be printing sometime around the 21st. I could help you > > with my printer at limited expense (unless something big happens in > > my life :) > > one piece of advice: buy some printbite, stick it to the aluminium > plate (after cleaning it - do follow PRECISELY the instructions for > printbite installation). better, get a MK3 (aluminium) bed plate, > because having a MK2 not in full contact with the aluminium is a pain > (uneven heat distribution and transfer). i've currently stacked some > cardboard underneath to make the MK2 stop bowing downwards... > *sigh*... > > printbite will stop a world of pain in both making prints stick and > also getting them off. but *read and follow the instructions*. > > l. Actually, I was thinking of using a lokibuild sheet (another kickstatr? thing (seems I have lost the link...)): here is one of the right size? https://shop3duniverse.com/collections/accessories/products/3d-universe-lok… Thanks, David

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Re: [Arm-netbook] Micro desktop corner design
by Luke Kenneth Casson Leighton 30 May '17

30 May '17

On Tue, May 30, 2017 at 5:09 AM, Tor, the Marqueteur <Marqueteur(a)fineartmarquetry.com> wrote: > On 29/05/17 16:56, Luke Kenneth Casson Leighton wrote: > ...snip... >>> 1. Am I right that the front right corner actually only needs a single >>> wide dado on the inside face for the eject button? >> >> yes. >> >>> 2. Do any of the components on the other three corners need cutouts, >> >> no. >> >>> or are they back just far enough to clear? >> >> yes. > > Then, presuming I can find a router bit within tolerance for the height > of the eject button, it looks like I could do this design as is for the > corners. if i thin down the parts on the inner edge i could potentially do away with the need for the eject button inset entirely. i also want to bring out the PCB cut through to the front so that you can do a straight-through cut with a router @ around 1.8 to 2.0mm. l.

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postMarketOS : good fit for EOMA50/68?
by Mike Leimon 30 May '17

30 May '17

Announcement of this project has been making the rounds lately and I think that it might be an excellent fit for an EOMA50 based phone/tablet (if and when those designs materialize). https://ollieparanoid.github.io/post/postmarketOS/ Currently they are targeting only old phone hardware however, I think that their concept would work well for any phone/touchscreen device that is designed to have a long useful life. I may be wrong but, I think a OS distribution of this nature would be an excellent complement to computing hardware that is also designed to last much longer than the current norm. -Mike

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Re: [Arm-netbook] libre 64-bit risc-v SoC
by David Niklas 30 May '17

30 May '17

On Mon, 8 May 2017 06:24:08 +0100 Luke Kenneth Casson Leighton <lkcl(a)lkcl.net> wrote: > On Mon, May 8, 2017 at 4:00 AM, David Niklas <doark(a)mail.com> wrote: <snip> > >> > important to avoid, because mixed analog and digital is incredibly > >> > hard to get right. also note that things like HDMI, SATA, and even > >> > ethernet are quite deliberately NOT on the list. Ethernet RMII > >> > (which is digital) could be implemented in software using a minion > >> > core. the advantage of using the opencores VGA (actually LCD) > >> > controller is: i already have the full source for a *complete* > >> > linux driver. > > > > Considering that analog was around *long* before digital I'm surprised > > that it is "Hard to get right", > > analog isn't "hard". digital isn't "hard". specifically *MIXING* > them is ultra-hard. > > > is there a reason for this? > > completely different processes and design criteria. the restrictions > (design rules) placed on digital ASIC layouts have to be adhered to in > the *analog* areas: you can't just change the stack to suit the analog > areas. i don't know the full details, but i know someone with 30 > years experience of working with ASICs who does. > > > Isn't there a chip for just this kind of thing? > > no. not a custom one... and we're taking custom ASICs. Forgive me for contradicting you again, but don't all computers that have a MIC in jack using some sort of analog to digital converter? And vice-versa with Headphone out? I think they all use PCM. Would such a converter be suitable? Why? Thanks, David

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Re: [Arm-netbook] Micro desktop corner design
by Luke Kenneth Casson Leighton 30 May '17

30 May '17

--- crowd-funded eco-conscious hardware: https://www.crowdsupply.com/eoma68 On Mon, May 29, 2017 at 7:38 PM, Tor, the Marqueteur <Marqueteur(a)fineartmarquetry.com> wrote: > Aloha Luke, > > I sent this to the list a couple times, but it hasn't shown up and nor > have any replies, so I'm sending it to you. I don't think anything's > changed with my email that should have done it, but maybe you'll see > something on the backend now that you know to look. > > Thanks, > Tor > > > Aloha, > > I just came across the page still up on my browser, and ended up with a > couple questions about the design as it stands now. > > 1. Am I right that the front right corner actually only needs a single > wide dado on the inside face for the eject button? yes. > 2. Do any of the components on the other three corners need cutouts, no. > or are they back just far enough to clear? yes.

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Re: [Arm-netbook] first prototype microdesktop casework
by David Niklas 30 May '17

30 May '17

On Mon, 8 May 2017 06:15:10 +0100 Luke Kenneth Casson Leighton <lkcl(a)lkcl.net> wrote: > On Mon, May 8, 2017 at 2:07 AM, <doark(a)mail.com> wrote: > > I apologize for DOS'ing the list, I can only get online about once a > > week. > > > > On Sat, 29 Apr 2017 12:42:29 +0100 > > Luke Kenneth Casson Leighton <lkcl(a)lkcl.net> wrote: > >> > >> On Sat, Apr 29, 2017 at 6:08 AM, Luke Kenneth Casson Leighton > >> <lkcl(a)lkcl.net> wrote: > >> > http://rhombus-tech.net/community_ideas/micro_desktop/news/ > >> > >> ok, ouch, onto the fourth revision of the corner-pieces already, and > >> some minor changes to the plywood are needed as well. this really > >> would have been awkward if someone else did it. > >> > >> the anycubic 3d printer is holding up well. the higher-quality PLA > >> from the company i found on aliexpress seems reasonable so far (the > >> "standard" quality definitely isn't: it literally crumbles under > >> pressure). > > <snip> > > > > Luke, (I can call you Luke, since you sign your name that way, right?) > > PLA stands for Poly-Lactic-Acid and if they are selling you something > > else you can complain, if not sue for false advertising. That's why we > > label things, so that we know what they are, right? So one PLA aught > > to be the same as any other. Aluminum is aluminum, titanium is > > titanium, why is PLA not PLA? > > it's partly down to where the lactic acid comes from: like any > chemistry you get a different yield and a totally different > composition depending on the process, the purity and the ingredients. > > most companies use corn for the raw materials, and they don't process > (purify) it properly. the result is that the PLA gives off acrid > fumes, deforms under pressure, does not adhere properly (to itself... > which is kinda important) and is generally completely fucking useless > for well... everything to do with 3D printing. Is there a way to tell how good a company is with their PLA? Price would not seem to make a big difference since companies can just charge lots of moo-la even with a poor product. <snip> > ok, i'd like you to do a test. take a small piece about 5cm long and > bend it very very fast, as quickly as you can, making the loop as > small as you can (8mm or less if you can). > > good PLA will snap. > > shit-quality PLA will discolour, going light-coloured. > > another test - a really really important one - is to make a long > rectangle (35mm high x 5mm x 10mm would probably do) - the height is > important - then clamp one end to a desk. on the other end suspend a > weight tied with string as close to the end as possible. make the > weight... let's say.... 0.5kg or so. not very much. now leave it for > a month. <snip> Like this? +-+ <--- Rectangle | | +DESK++-+W <--- Weight | | | | | | Thanks, David

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Re: [Arm-netbook] why are notebook devices not usb?
by ronwirring＠Safe-mail.net 30 May '17

30 May '17

-------- Original Message -------- From: Luke Kenneth Casson Leighton <lkcl(a)lkcl.net> Apparently from: arm-netbook-bounces(a)lists.phcomp.co.uk To: Eco-Conscious Computing <arm-netbook(a)lists.phcomp.co.uk> Subject: Re: [Arm-netbook] why are notebook devices not usb? Date: Sat, 27 May 2017 18:56:18 +0100 > On Sat, May 27, 2017 at 6:16 PM, Christopher Havel > <laserhawk64(a)gmail.com> wrote: > > > Money. It's cheaper to do it that way.. > > yyep. this s pretty much.. errr... on the money An unforeseen answer. I thought it would be lower priced to make an usb device one time and several notebook manufacturers would buy the device for their notebook. The going for thinner argument sounds relevant. I thought making proprietary devices would make it more difficult and expensive for other manufacturers to make the same devices. Remarkable that it is lower priced for a manufacturer to make a device by themselves. > > > There's also the form factor to consider -- to an extent, there are no > > standards for laptop gadgetry because there's no way to do that. Different > > laptop sizes and shapes require differently-sized and -shaped crap inside. > > ... all completely optimised and customised based around what they > can get hold of, or what the reference design from intel is (which > will have specific power requirements and thermal requirements)...then > there is the constant demand for "thin-ness" which, as chris says, > means that a CUSTOM CONNECTOR gets ordered and made... and you can't > get hold of them. > > ron i wrote a long time ago when developing the tablet, about using a > single embedded controller which only costs $1, instead of putting in > a $1 USB hub, a $1.50 USB camera, a $1 USB audio IC and so on. > > it all adds up and the margins are so insanely low on laptops - ten > percent FOR THE ENTIRE CHAIN right from factory to sales - that they > just cannot justify the extra cost. > > l. > > _______________________________________________ > arm-netbook mailing list arm-netbook(a)lists.phcomp.co.uk > http://lists.phcomp.co.uk/mailman/listinfo/arm-netbook > Send large attachments to arm-netbook(a)files.phcomp.co.uk

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ZEOMA Datasheet Hosting
by Alexander Ross 29 May '17

29 May '17

My friend that provided me with some hosting space to play with, is clearing up and with that my hosting space is coming to an end. I’ve made a copy of all the files for the zeoma project and will be uploading them to a gitlab group or https://www.archive.org

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Re: [Arm-netbook] libre 64-bit risc-v SoC
by David Niklas 29 May '17

29 May '17

On Mon, 8 May 2017 09:42:36 +0200 "mike.valk(a)gmail.com" <mike.valk(a)gmail.com> wrote: > 2017-05-07 22:26 GMT+02:00 <doark(a)mail.com>: > > > I apologize for DOS'ing the list, I can only get online about once a > > week. > > > > On Fri, 28 Apr 2017 13:58:57 +0100 > > Luke Kenneth Casson Leighton <lkcl(a)lkcl.net> wrote: > > > > > > On Fri, Apr 28, 2017 at 12:47 PM, mike.valk(a)gmail.com > > > <mike.valk(a)gmail.com> wrote: > > > <snip> > > > > I think/hope FPGA's are more efficient for specific tasks then > > > > CPU/GPU's > > > > > > you wouldn't give a general-purpose task to an FPGA, and you > > > wouldn't give a specialist task for which they're not suited to a > > > CPU, GPU _or_ an FPGA: you'd give it to a custom piece of silicon. > > > > I always thought that FPGA's were good for prototyping or small fast > > tasks... But that's just how I learned about them. > > > > Don't think of what you were thought. Think of what you can do which has > not been thought. > > The world outside the box is bigger than the on inside the box ;-) Don't I know :) Linux Linux +-------+ Linux | | Linux |WINDOWZ| Linux | | Linux +-------+ Linux Linux Linux > > > > > in the case where you have something that falls outside of the > > > custom silicon (a newer CODEC for example) then yes, an FPGA would > > > *possibly* help... if and only if you have enough bandwidth. > > > > > > video is RIDICULOUSLY bandwidth-hungry. 1920x1080 @ 60fps 32bpp > > > is... an insane data-rate. it's 470 MEGABYTES per second. that's > > > what the framebuffer has to handle, so you not only have to have the > > > HDMI (or other video) PHY capable of handling that but the CODEC > > > hardware has to be able to *write* - simultaneously - on the exact > > > same memory bus. > > > > > <snip> > > Your number seemed off to me so I did the math: > > 1920*1080*60*4 == > > 497,664,000 > > You're off by almost 30 MiB. > > > > 497,664,000 ~= 498 MB (Units of 1000) > 497,664,000 ~= 475 MiB (Units of 1024) <snip> \me embarrassed. Sincerely, David

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$150 taobao knock-off 3d printer doing 200mm/sec
by Luke Kenneth Casson Leighton 29 May '17

29 May '17

https://www.youtube.com/watch?v=3IGQ_8K3tGI this is a quick video of the horribly cheap and cheerful taobao $150 plus $40 shipping 3d printer making a HELL of a racket, successfully PRINTING at 200 mm / sec. acceleration settings have been turned up to... enormous: 4000 mm / sec^2 for X and Y, and 9000 mm / sec^2 for the extruder. in previous tests i was running at 2000 mm / sec^2 and at 120 mm / sec print speeds there was clear signs of "bulging" along the 0.7mm wide screen bezel, where at the last moment the print head would slow down *but extrusion clearly didn't*, and instead of a nice line you get this "teardrop" effect. by putting the acceleration so insanely high that artifact *DISAPPEARS*. now, due to the bone-rattling speed the frame is clearly vibrating around, which results in this "wave" pattern as the printhead goes through this massive 180 reversal, *but*, i am amazed to find that the "wave" pattern stabilises after around 4mm and is not hugely noticeable anyway. it's basically outperforming the mendel90 for quality, yet still matching it for speed. i'm... absolutely astounded. still to consider is putting in some acrylic / MDF / hardboard surrounds that would stiffen up the frame. l. --- crowd-funded eco-conscious hardware: https://www.crowdsupply.com/eoma68

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