Here's what I sent them.
Several years ago I purchased a driver and breakout board from you. I has worked great for me. It's a 4 axis board and I never used the 4th axis. Now I'm trying to connect the 4th axis and having some trouble. The motor only turns in one direction. I'm not getting a voltage drop on the driver board on pin#9, when I reverse the motor. It drops on the breakout board but not on the driver board. Do you have any ideas what I could try? I don't see the driver board on you e bay page anymore, are you still selling them? I think I got mine in 2007.
Thank You,
This is the answer I got from them.
Hi Jerry, Sure It is possible your mach3 pinouts are incorrect, because pin 9 is the step pin and the voltage should not drop on that. Pin 8 is the actual direction pin. and pin 5 is the enable pin. See if that changes anything. Sorry, not carrying that anymore.
I may have all my pins wrong, I don't know, but it's been working. I have pins 2,3 on the X axis, 4,5 on the Y axis, 6,7 on the Z axis and 8,9 on the 4th axis. I'm not sure what the guy is telling me.