LinuxCNC-RIO - RealtimeIO for LinuxCNC based on FPGA (ICE40 / ECP5)

PCW wrote:

If this is a drive level issue, note that a 26C31 does not swing to 5V
and its output level is about 2 diode drops below 5V (3.6V) with a 5 mA load.

I connected the motor driver using +5V and A-.
 

Meister, if you were in Taiwan, I would definitely buy one for you. Taiwan and China are not the same country.This Riocore ICEBreaker V1.0e circuit board should be a 2026 product; I bought it on Taobao in China in June 2026. At the time, I asked the China seller about a DM542 zero-point positioning error, and the China seller tested it and got the same result. He recommended I discuss it on the Linux CNC forum. 
 

PCW wrote:

If this is a drive level issue, note that a 26C31 does not swing to 5Vand its output level is about 2 diode drops below 5V (3.6V) with a 5 mA load.I have experience using some MESA control cards and connecting drivers, so I shouldn't have any technical difficulties connecting motor drivers.  

I have experience using some MESA control cards and connecting drivers, so I shouldn't have any technical difficulties connecting motor drivers.