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When LinuxCNC sends a command to the frequency controller via Modbus RS485, the G-code "freezes" or stops executing commands

unknown wrote:

And unless you disable SPI you can not use the SPI pins for GPIO in linuxcnc
 

This is the problem that I could not see.
Thanks for everything.
In my configuration I have used GPIO7 and GPIO8 as I/O .
After disabling the spi, I solved the problem....

I find it very assuring. No seller seems to think quoting any opertating voltage would be a clever idea.

If those basics are not covered I tend to stay away from offers.

p.s. The NEMA23 only refers to the frame size (mount hole pattern) the electrical specification is totally independent from that.
Voltages, current and how fast you need to run your motor are more important. 

can you share your full config?

does it work now?

youtube.com/shorts/vI0LGnGjhmI?si=QLHawiX2xE67YjWh

youtube.com/shorts/FzLijBCwhX8?si=wHB4NtbOI7QP0iu-

Here's 2 clips, one "gravel mode" and one right after restarting linuxcnc running smooth.

Basically you can make an FPGA design that uses a Spartan 6 and use the mesa hostmot2 firmware. No need to develop fpga code or write a new driver.

Here's an example
github.com/ozzyrob/Linuxcnc-FPGA