Re: [CAD_CAM_EDM_DRO] Maybe OT, reprap build started

High-performance microcontroller code must often be written in ASM.
C is not very tight code, and can yield different results under
different compile conditions when it tries to compile into assembly (no
microcontroller runs C directly). And this looks like VERY demanding
execution.

So, it would not be too surprising to me that it would be provided in
ASM, and I don't see it as indicative of secrecy.

Danny

On 10/10/2011 1:10 AM, Phil@Yahoo wrote:
> Thank you. I'm not sure whether you refuted or proved my point. To be fair,
> after my last message I found an 84MB file and downloaded it, which seems to
> contain everything including the kitchen sink. Lots of stuff written in
> Java, some in C, and some in probably Arduino lingo. There was one file
> named thermoplast-direct-drive.asm that does not appear to be human-readable
> source. Maybe .asm means something else to some folks. I may or may not be
> able to find what I am looking for in this pile, to wit:
>
> 1. How tempreature and feed rate is regulated in RepRap.
> 2. What sort of protocol is used to control temperature& feed (simple
> on/off?)
> 3. Minimum requirements for a 3-axis machine to be used for 3D printing with
> available CAM software& Mach3 or EMC2.
> 4. How to minimize the odds of being bitten on the butt if I start building
> support hardware.
>
> I suspect this is sort of a snap-shot dump of available files on some given
> day, dependent more on who happened to be available to contribute to the
> pile than on any sort of usability plan. But maybe that has always been the
> way of all flesh in the open source world.
>
> --Phil M.
>
> ----- Original Message -----
> From: "Mike Payson"<mike@...>
> To:<CAD_CAM_EDM_DRO@yahoogroups.com>
> Sent: Sunday, October 09, 2011 9:56 PM
> Subject: Re: [CAD_CAM_EDM_DRO] Maybe OT, reprap build started
>
>
> On Sun, Oct 9, 2011 at 9:41 PM, Phil@Yahoo<yahoo@...> wrote:
>> Thanks, but those URLs serve only to illustrate my point. For example, the
>> "schematic" on the extruder page is actually a picture of a schematic (a
>> .png file) which shows only the pinouts of the major components of the
>> board. It does not show how they are interconnected, nor is it complete.
>> In
>> short it is useless, a pretense. Same thing for "source code." You can
>> find
>> things like test programs to drive the extruder at a constant rate or to
>> read the thermocouple, but nothing non-trivial. By far the most space is
>> devoted to instructions on assembling the PCB. This "open source" project
>> is
>> nothing more than a thinly disguised marketing program. Nothing wrong with
>> selling, but to do so under false premises is, in my opinion, despicable.
>> Technical aptitude or not, a liar is still a liar. (NOTE: I'm not calling
>> YOU a liar. I don't know who is behind the false claims. It's a matter of
>> principle. It's unethical.) These web pages look at first glance like a
>> trove of valuable information, but they are really little more than a
>> sales
>> pitch. I'll withdraw my assertion when somebody shows me something
>> substantial that is useful without first buying something from the
>> promoters.
> Umm... did you see the section "The Ever-Controversial File Section
> (These are our sources folks!)". They do provide sources, though as
> they note they are for a proprietary ECAM program that only works with
> a single PCB house. While it is not ideal, it is open source. That
> board design is different, but it is based on the satndard Gen3 (hence
> "Gen3 remix") so you can also look at the sources for the standard
> Gen3 boards from Makerbot, which have Eagle files available.
>
> That said, virtually everyone in the community will tell you to avoid
> Techzone, and by all means avoid Gen3 (whether Techzone or Makerbot)
> at this point because it is horribly obsolete.
>
> The two sets of electronics that I recommend are RAMPS and
> Sanguinololu, both of which provide Eagle files for the board sources.
>
> http://reprap.org/wiki/Ramps
> http://reprap.org/wiki/Sanguinololu
>
>
>> --Phil M.
>>
>> ----- Original Message -----
>> From: "Kevin Martin"<kpmartin@...>
>> To:<CAD_CAM_EDM_DRO@yahoogroups.com>
>> Sent: Saturday, October 08, 2011 6:42 AM
>> Subject: RE: [CAD_CAM_EDM_DRO] Maybe OT, reprap build started
>>
>>
>>> Our extruder is described at
>>> http://reprap.org/wiki/Wade%27s_Geared_Extruder which is actually one of
>>> the better-documented parts of the printer.
>>> The electronics are described at
>>> http://reprap.org/wiki/Generation_3_Electronics/Tech_Zone_Remix
>>> The individual boards are described in pages linked to from
>>> http://reprap.org/wiki/Generation_3_Electronics, for instance our
>>> extruder
>>> controller 2.2 is described at
>>> http://reprap.org/wiki/Extruder_Controller_2.2
>>> The firmware is described at http://reprap.org/wiki/Generation3Firmware.
>>>
>>> That being said, all the stuff we have is at least a year old, and
>>> verifying that the above documents (which may refer to more up-to-date
>>> stuff) are still relevant to us is difficult. For example I thought we
>>> has
>>> the )optional) Thermocouple Sensor 1.0
>>> (http://reprap.org/wiki/Thermocouple_Sensor_1.0) but it turns out that
>>> our
>>> thermocouple sensor uses a different chip, one designed for monitoring
>>> NiMH battery charging. The board circuit is different but the board
>>> interconnect is the same. A firmware change accounts for the difference
>>> in
>>> the data generated by the two thermocouple controllers.
>>>
>>> Calibration (or lack thereof) is one of my major complaints about the
>>> whole field. There are calibration/tuning parameters wired into the
>>> source
>>> code, so to adjust them you have to load new firmware. Which requires
>>> building new firmware. Which requires being absolutely sure you start
>>> with
>>> the correct source code for the firmware you already have.
>>>
>>> Has anyone make up some tables for ...? Probably yes. Can you find their
>>> results? Maybe. Can you be sure their results are applicable to your own
>>> setup? Thanks to the versioning mess, probably not.
>>>
>>> -Kevin Martin
>>> the Papertrail Handmade Paper& Book Arts
>>> New Dundee, Ontario
>>> 518-884-7123
>>> www.papertrail.ca
>>>
>>> -----Original Message-----
>>> From: CAD_CAM_EDM_DRO@yahoogroups.com
>>> [mailto:CAD_CAM_EDM_DRO@yahoogroups.com] On Behalf Of Phil@Yahoo
>>>
>>> Glad to hear that. So can you share some URLs? I'm not talking about
>>> drawings for bits of plastic, but about PCB schematics and microprocessor
>>> source code for things like temperature controllers. Also I'm wondering
>>> how
>>> to calibrate the extrusion speed to the head motion speed. Has anyone
>>> made
>>> up some tables correlating filament size with temperature and extrusion
>>> speed and nozzle size and head travel speed? That's where the important
>>> knowledge is if you don't want to re-invent the wheel. Moving things in
>>> X-Y-Z is the easy part.
>>>
>>>
>>
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> OFF Topic POSTS: General Machining
> If you wish to post on unlimited OT subjects goto:
> aol://5863:126/rec.crafts.metalworking or go thru Google.com to reach it if
> you have trouble.
> http://www.metalworking.com/news_servers.html
>
> http://groups.yahoo.com/group/jobshophomeshop I consider this to be a
> sister site to the CCED group, as many of the same members are there, for OT
> subjects, that are not allowed on the CCED list.
>
> NOTICE: ALL POSTINGS TO THIS GROUP BECOME PUBLIC DOMAIN BY POSTING THEM.
> DON'T POST IF YOU CAN NOT ACCEPT THIS.....NO EXCEPTIONS........
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>
> OFF Topic POSTS: General Machining
> If you wish to post on unlimited OT subjects goto: aol://5863:126/rec.crafts.metalworking or go thru Google.com to reach it if you have trouble.
> http://www.metalworking.com/news_servers.html
>
> http://groups.yahoo.com/group/jobshophomeshop I consider this to be a sister site to the CCED group, as many of the same members are there, for OT subjects, that are not allowed on the CCED list.
>
> NOTICE: ALL POSTINGS TO THIS GROUP BECOME PUBLIC DOMAIN BY POSTING THEM. DON'T POST IF YOU CAN NOT ACCEPT THIS.....NO EXCEPTIONS........
> bill
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> List Owner
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