Hello all,

I'm putting together a CNC Mill using the CNCDrive, UC100 and CNC4PC C10 Bob. The firmwware on the UC100 is for UCCNC and it's the latest version.

The issue I'm having is when the UC100 is unplugged or the PC is sleeping the outputs on the c10 are floating at around 2.7 volts. This is bad as it causes my stepper drivers to step at about 0.5ipm, and it's just not a single axis doing this it all three at the same time. I can't think of a way around the problem, I can't use the enable pin on the C10 because the outputs are disabled. I also can't pul anything up or down because the buffers seem to be in this tri-state of 2.7v.

The machine performs perfectly when the PC is awake.

Any ideas would be great.


Edit: I just noticed that if I set pins 5 or 7 high on the UC100 the bob powers up if the machine isn't providing the C10 5v..