Linuxcnc on Raspberry

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15 May 2021 23:45 #209010 by andypugh
Replied by andypugh on topic Linuxcnc on Raspberry

Cncninja wrote: The Mesa 7190HD is 59USD and works over SPI has anyone given this a shot yet?


I think that Pi + 7i90 is the config that Gene (on the mailing list) is running his Sheldon lathe with.

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21 May 2021 07:00 #209733 by tjtr33
Replied by tjtr33 on topic Linuxcnc on Raspberry
Hi Cncninja,
I am assuming you are talking about software step generation with RPi4.

Given that, do you mean 30000 steps per second? or per minute?

30000 per second requires less than 33uS period for thread AND doublestep.

At my tested 80uS thread I can do a bit less than 12500 per second.
( 1 sec / .000080 sec = 12500 thread cycles per second , at most )

tomp

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