Need help for PID Pressure Control using Stepper Motor

[vijay s]

PID for Pressur Control

Hai
i have an application to control the pressure of oil in Flow Pipe, Where Stepper Motor is used for Increasing or Decreasing Pressure by Compression...

So, Can i implement PID Controller here to Control Pressure.. And Actually Stepper Motor is Controlled with Pulses from Microcontroller....

any Ideas, please Share...

 

[bassa]

Re: PID for Pressur Control

You may follow the link given below, from National Instruments

Feedback loop (PID) for driving a stepper motor

The reason why you can't find PID examples with pulse train outputs is the fact, that this is everything else but a typical usecase. Unlike servo motors, the discrete positions of a stepper motor are not well suited for closed loop control. In fact most motion control systems that offer closed loop stepper modes don't run PID loops. Instead they compare the motor's position with the commanded position at the end of the move and compensate the difference by pull-in moves. Stable PID control of a stepper motor is hard to obtain and it's not recommended.

regards
bassa