hello
I have a dc motor that is running a pump. this pump has a presure sensor and I would like to controll the pressure of the pump by changing the speed of the pump. this works fine manualy but now i want the pressure to be constant.
the pololu jrk21v3 controller because it offers position or speed feedback options. This board works very good whit position feedback. But the problem is whit speed feedback. When the PID error gets down to 0 also the duty cycle goes down to 0 and my pump is not running ok. the pump is oscilating from almost 0 rpm to full load
what am I doing wrong whit the controller.
I think that the speed controll would work in a diferent way.
when the feedback and the set valeu are the same the duty cycle stays constant and is geting smaller or larger if needed…What is happening to me the duty cycle goes to 0 when the feedback and the set valeu are the same
any solutions
thanked you