This is a troubleshooting challenge.
I am using PCI-7344 control card with MID-7654 amplifier driving a three axis dc motor servo system.
Periodically the servo system does not work. There is no drive signal to the motor. At times we have seen commands to one axis result in another axis moving. Because it it intermittent it is highly frustrating.
If I insert a breakout box in the system to try to observe signals on scope, the system only works in one direction and only when scope probes are attached.
Any ideas? I have checked and double checked the wiring. It seems correct. I have tried increasing the drive output of the amplifier and there is no change.
