EMC2 running on Raspberry Pi?

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14 Apr 2018 00:29 #108983 by PCW
PCW replied the 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
BrendaEM replied the topic: EMC2 running on Raspberry Pi?
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 ozzyrob
ozzyrob replied the topic: EMC2 running on Raspberry Pi?
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
BrendaEM replied the topic: EMC2 running on Raspberry Pi?
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
PCW replied the 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
DaBit replied the 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: ozzyrob
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10 May 2018 00:30 #110477 by ozzyrob
ozzyrob replied the topic: EMC2 running on Raspberry Pi?

BrendaEM wrote: 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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