What are the basic hardware requirements for running LinuxCNC?

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22 Sep 2025 07:13 #335268 by kamal123
Hi ,

I'm Kamal Hinduja based Geneva, Switzerland(Swiss). Can anyone explain What are the basic hardware requirements for running Linux CNC?

Thanks, Regards
Kamal Hinduja Geneva, Switzerland

 

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22 Sep 2025 07:41 #335270 by unknown
RPi5.
Any PC from the last 10 years, it's pretty modest.
If using an external FPGA card to generate step\dir signals latency isn't as much as issue that when using the parallel port.
USB isn't supported, basically as it's not realtime.
So you could drag an old 3rd Gen i5 out of garbage bin and you'd have a perfectly capable machine, even if you were just going to use a parallel port and software generated step\dir signals. That's basically how I got my machine I use for testing.
If you have the choice of avoiding Realtek based NICs avoid them, as they require some effort to get decent results from.
Basically download a ISO, image it to a USB stick, boot it and run a live session and run a latency test. Should give you an idea of how it should perform.
Now for the rest, that will depend on whether you want to use ethercat, mesa, parallel port or one of the other great projects on the forum.
And the above will depend on the type of machine you are building\retrofitting.
And if you are unfamiliar with Linux, forget what the Windows experts say, you don't need to be a programmer, you don't need to be tied to a console typing out arcane commands.
Ask all the questions you need and evaluate the different answers you get. Mine is just based on my own experience as a hobby machinist.

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22 Sep 2025 15:39 #335285 by timo
I am just confirming "unknown".

I am running one on a 2nd hand mainboard for 10€ the CPU was salvaged from a damaged office PC, memory I found somewhere "new old stock" :-) .

"Linux wizardry" has come to a point where installation runs just from the USB stick.
subjective perception: getting rid of unwanted software on a new Win laptop took longer than installing the Linux system.
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22 Sep 2025 16:27 - 23 Sep 2025 02:42 #335289 by tommylight

"Linux wizardry" has come to a point where installation runs just from the USB stick.

Linux did that 20 years ago, from CD and DVD and USB, or if you are just a bit into networking, through network, meaning you can rum full Linux PC's with no hard drives and no USB, and they boot from a server somewhere on the local network.
Search for PXE.
Last edit: 23 Sep 2025 02:42 by tommylight. Reason: typo

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22 Sep 2025 18:34 #335300 by Aciera
Note to self: Possible spam setup

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22 Sep 2025 21:48 #335307 by unknown
No links as of yet.

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23 Sep 2025 02:42 #335315 by tommylight
You two could have said something about me writing "200 years ago" above :) :) :)

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