PC for linuxcnc

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14 Mar 2017 07:51 #89574 by Radek
Radek created the topic: PC for linuxcnc
Hi, i found this website and have some questions.
1. Does everyone specification of these components meet the requirements for linuxcnc?
2. Max intervals - less means better?
3. Is the max jitter so important for PC with MESA card?
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14 Mar 2017 13:33 #89582 by Todd Zuercher
Todd Zuercher replied the topic: PC for linuxcnc

Radek wrote: Hi, i found this website and have some questions.
1. Does everyone specification of these components meet the requirements for linuxcnc?
2. Max intervals - less means better?
3. Is the max jitter so important for PC with MESA card?


1 - Depends on the application. If you need to do fast software stepping or trying to read an encoder through the parallel port you, will need something with pretty good latency.
2 - Yes, smaller numbers are better.
3 - Yes, with hardware step generation and encoder counting, super low latency is less critical.

Remember those wiki pages and the info in them are often quite old and sometimes obsolete. Most of the boards listed there are only available 2nd hand if they can be found at all. The good news is finding a newer PC with acceptable latency usually isn't very hard. Most are fine. Ones to steer away from are generally low end high volume discount machines from larger manufacturers, that tend to have very limited or no ability to change power saving settings in the bios (and laptops).
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