LinuxCNC on RPI

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26 Jul 2019 23:32 #140699 by scotta
LinuxCNC on RPI was created by scotta
I have started to post details on how I have been getting LinuxCNC up and running on Raspberry Pi.

https://scottalford75.github.io/LinuxCNC-on-RPi/


I started with Raspbian but soon moved to Arch Linux due to the out of date OpenGL libraries. I will also start to put up details on my development of spiPRU that turns a cheap 32bit 3D Printer control board into a PRU (programmable real-time unit) connected to the RPi via the SPI bus. This then gives hard real-time step generators for the RPi similar to the Beaglebone inbuilt RPU’s.

For <$150 it’s now possible to have a LinuxCNC system!

Scott

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27 Jul 2019 03:13 #140712 by Todd Zuercher
Replied by Todd Zuercher on topic LinuxCNC on RPI
If making swarf for the least amount of money is your goal, dumpster dived PC is usually cheaper.
:)

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27 Jul 2019 06:12 #140719 by scotta
Replied by scotta on topic LinuxCNC on RPI
Dollars not the main driver. Size and the challenge to get it to work. :) Always need a challenge to keep the interest going.

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27 Jul 2019 06:16 #140720 by pl7i92
Replied by pl7i92 on topic LinuxCNC on RPI
what rasperian did you choose

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27 Jul 2019 09:11 #140729 by tommylight
Replied by tommylight on topic LinuxCNC on RPI

pl7i92 wrote: what rasperian did you choose

Arch linux ! :)

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27 Jul 2019 11:13 #140739 by pl7i92
Replied by pl7i92 on topic LinuxCNC on RPI
my fault language problem the version of the hardware as there are many pi versions
The following user(s) said Thank You: tommylight

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27 Jul 2019 21:16 #140771 by scotta
Replied by scotta on topic LinuxCNC on RPI
Hardware currently is RPi 3B and 3B+. Would love to get my hands on a 4 as well to test the LinuxCNC component. spiPRU is based 100% on the BCM2835 driver library by Mike McCauley. Only using the SPI portion but in theory would also give GPIO access to rtapi. The RPi 4 might have a suitable base thread... maybe not..

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28 Jul 2019 15:53 #140807 by pl7i92
Replied by pl7i92 on topic LinuxCNC on RPI
the rapberryCNc club saying it is significant slower then the 3B version on printer setup

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03 Aug 2019 18:21 #141280 by Bari
Replied by Bari on topic LinuxCNC on RPI
Are they building a preemp_rt kernel? Which kernel version?

How much space can i save by using a Rpi to control this vs a PC?
imgur.com/ey5VtXu



Just kidding. The Rpi4 has an integrated Ethernet controller so you should be able to use Mesa Ethernet cards to control stepper, servos and galvos.

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03 Aug 2019 21:13 #141297 by Hakan
Replied by Hakan on topic LinuxCNC on RPI
I have tested that. Works fine.

The following user(s) said Thank You: Mike_Eitel

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