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I'm using a Raspberry Pi 4 to drive a Mesa 7i96.   For unknown (as yet) reasons, I can't reliably run without errors unless I bump SERVO_PERIOD to 2000000 (i.e., 2ms).

What affect will this have on machine operation?  I sort of understand what's scheduled to run in the base thread, which of course is largely (completely?) irrelevant now that I have the Mesa.  But I don't have a good mental model for what runs in the servo thread, so I don't have a good understanding of what happens to operation/performance if it only runs half as often as usual.  Where would the difference show up?

Until recently my mill maxed out at about 40ipm, so absolute performance wasn't really a consideration.  I've upgraded to a machine capable of at least 80ipm using Grbl, and initial tests with LinuxCNC and the Mesa card indicate 100ipm may be fine.  So now I'm wondering if I need to start worrying more about that servo thread.

paul

Dear linuxcnc users,
i want to introduce my new open source project based on the W5100S-EVB-PICO . ~10 USD (raspberry pico clone)

features:
1 to 8 step generator with 255KHz maximum output in this version, (possible higher freq) enough for 15m/min with 0.001mm
1 to 8 quadrature encoder counter with 12.5MHz theoretical maximum counting frequency.

current version in the github page is support 4 stepgen and 4 encoders
linuxcnc driver supports multiple instances
planned direct SPI communication with raspberry-pi4 (with normal pico)

github: stepgen-encoder

what do you all have against a raspberry pi?
it works well and there are all kinds of cases for it.
2. NIC via USB