I have a similar issue but the root cause might be different. May I ask, does the 10V reference output on your Sprint board correctly outputs 10V?

Hi, A long time lurker (~6 years) and first time poster here on Denford forum. I have been using Novamill (built in 2002 I think) for some 6 years now. Initially I was using it with the software that came with it but sometime in 2019 I converted it to Mach3 parallel controller board. That was basica...