Jrk21v3 not displaying current

I’m using the Jrk 21v3 to control a Concentric linear actuator with potentiometer feedback. I’m using the Jrk Configuration Utility to run the motor by manually setting the target. The Jrk is in analog voltage feedback mode. As you can see from the attached image, the controller and motor are functioning properly in that I set the target and then the motor runs until the target is achieved. However, according to the graph, there is no current detected. I even scaled the graph down to +/- 10 mA and there is still no deflection. Any ideas why this would be?


Hello. What is your current limit parameter set to? If it is 0, then the current will not be measured, and behavior you are seeing is expected. You could try changing it to something like 4000 mA. --David

That was it–thanks!