I inherited this piece of equipment which I assume at some point worked but now doesn't. It is controlled by Labview, which appears to send it commands over the serial port. It is called an indexer, and I think the commands are sort of like G code, in that they are commands to go to a certain spot, instead of just pulses. However, the stepper motor it is attached to only locks but does not move. I am having a lot of difficulty finding the manual for this, so I don't have much to go on in terms of trying to troubleshoot the problem.