EMC2 running on Raspberry Pi?

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14 Apr 2018 00:29 #108983 by PCW
Replied by PCW on topic EMC2 running on Raspberry Pi?
Probably the RPI's BroadCOM SOC doesn't have built in Ethernet, though a number of RPI clones
like "le potato" do have built in non USB based Ethernet.

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05 May 2018 06:39 #110236 by BrendaEM
Respectfully, I find it odd if EMC32 has difficulty running on a 1.4GHz processor'ed computer with 4 cores.

[Apparently, a dualcore 2.6GHz Dell laptop, is too slow as well.]

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05 May 2018 13:22 #110248 by InMyDarkestHour
I wouldn't even attempt Linuxcnc on a laptop, other than for development.
2 or more cores can can actually slow down task switching. ( At least of an x86 platform, I wish I could find the article I read about it)

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09 May 2018 16:55 #110439 by BrendaEM
I should hope that running on more than 1 core wouldn't be a problem because that would doom LinuxCNC, as there may be no single cored processors being made for the desktop.

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09 May 2018 17:03 - 09 May 2018 17:03 #110440 by PCW
Replied by PCW on topic EMC2 running on Raspberry Pi?
I've run LinuxCNC for more than 10 years and have never run it on a single core processor
(even 10 years ago they were uncommon in PCs)
Last edit: 09 May 2018 17:03 by PCW.

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09 May 2018 19:23 #110445 by DaBit
Replied by DaBit on topic EMC2 running on Raspberry Pi?
ARM MHz != x86 MHz. Those ARM things are quite slow per MHz. Not only CPU clock-by-clock, but also memory speed, storage speed, etcetera.

And the LinuxCNC core itself runs fine on even a 500MHz single-core Cortex A9. It is all the Python stuff and graphics that slows it down. Polling the LinuxCNC status channel a few times per second from within Python already causes quite a CPU load. This is something the MachineKit folks do better: they can run the UI on a remote target such as a tablet and use a fairly lightweight communication protocol. Should be possible with NML too, but nobody did it afaik.

Ontopic: The 3D printer is still running strong on the Pi 3. No issues at all.
The following user(s) said Thank You: InMyDarkestHour

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10 May 2018 00:30 #110477 by InMyDarkestHour

I should hope that running on more than 1 core wouldn't be a problem because that would doom LinuxCNC, as there may be no single cored processors being made for the desktop.


No that was not what I said.

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18 May 2019 23:31 #134226 by jmr
Replied by jmr on topic EMC2 running on Raspberry Pi?
Looks like I am bit in the past. I found my old raspberry.
Is there any recent downloadable sdcard image to try on my RPI21? The one I found is from 2013. I would like to try it out and wonder if anything got better since then, if not it would be nice to have newer LinuxCNC and a working environment for compilation without all the trouble.
Is the new awaited RPI-compatible MESA board going to work with older models? It looks very promising!

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19 May 2019 08:13 #134250 by twoflowers
I have a RPi3B+ running ith linuxcnc and steppers on GPIO, I used the instruction in the wiki to build it. Not the fastest, but it moves a simple mill. I'll get a mesa7i90HD next week, i'm couriouse how this will turn out.

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19 May 2019 08:39 #134253 by DaBit
Replied by DaBit on topic EMC2 running on Raspberry Pi?
The Pi3 in my 3D printer is still running flawless, and due to the fact that 3D-printing is a slow process it makes far, far more hours than mill and lathe combined.
The only issue I have is that the preprocessing of RepRap-flavour Gcode to LinuxCNC NGC is a bit slow for large files. I could move that to the PC running the slicer but I never bothered.

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