Got mine put together and I am having an issue with my right side Y axis motor. The left side will jog from my computer but the right side does not. If I change the cables, the left still works but not the right. If I unplug the right Y axis motor and plug into Z plug it will jog the right side.
Suggestions?
@golfer8866 Welcome to the group, Scott. 
Since you can move the right motor with the Z driver, the motor is good. Since changing the cables doesn’t move the problem, the cable is good.
I would suggest that you start by resetting all the dip switches on the driver that is acting up. Even if they seem to be correct, reset each of them.
If that doesn’t work, raise a support ticket with Sienci and I’m sure they will fix you up.
@golfer8866 I’m sure that they will take care of you, Scott. Given what you’ve said, while waiting, you may want to loosen the two bolts holding the anti-backlash nut to the plate.
Well its not the motor, its this third plug, what ever motor I plug into it it acts like what I mentioned. It jumps, seems almost like its acting like like what I think a steeper motor would. So I think its the brain box.
@golfer8866 It’s hard for me to tell from your pic, but it looks like the two sets are not set the same. All 4 sets should be set the same. Here is a pic of how they should be set. Switches 1 and 3 should be on; 2 and 4 should be off.
Thank you, thank you, thank you, so in my head each red box was being called out as box 1, box 2, etc… not the actual white switch. Now I know why they call them DIP switches. The thing you said that got me over was “All 4 should be set the same”
@golfer8866 So, Scott, are you up and running? If so, I’ll close this thread and simply tell you to have fun.
Yes it is working, you can close the thread.
@golfer8866 Good stuff.