I apologize if I overlooked this in searching, but I'm trying to resolve a bit of a noise issue and need some help. I have a C10 with the input pins set to pull down and Mach3 set to Active Low. We had some estop/limit issues a while back and put a .1uF cap on the estop input. But we also put them on the motor inputs as well for X, Y, and Z. Now, on that board, there is +5v next to the input pins e're using (10, 12, 13). We put the caps between the inputs and the +5v right next to it, but is that maybe the wrong way to go on this? Should we instead be putting it between the input and ground? Overall, the machine works okay at the start of a run but after a short bit, starts to drift and get real ugly. We're pretty sure it's interference (got better after eliminating some wireless need it), but can't figure out to clean it up completely.
Any help would be greatly appreciated!