Too small output to turn the motor


I am using the JRK21V3 controler to drive a windscreen wiper motor this motor moves a buterfly (rotation 90°) valve whitch is used to regulate the amount of whater to go to a pump. the fedback value is the motor current of the pump.

If I set the target high from the start the motr reaches the target perfect. The problem is when the calculated error is smal the given output is too smal to move the motor. What can I do?

If I make the P grater the proces is unstabile.

thank you.


Increasing the integral coefficient (I) should help compensate for small errors. You might want to read the “Setting up your system” section in the jrk user’s guide, which has some advice on tuning the PID constants.

- Kevin