Re: Stepper motor PID control

Most stepper motors use a closed loop system otherwise the
speed is severally limited. You can change modes at rest but you
don't need to. How are you planning to measure position?


w..
..

simnav@xxxxxxxxx wrote:

Sorry.. I've forgotten this question in previous message: It's
possible to control a stepper motor in a closed loop system via a
common PID algorithm ? I ask this to you because many commercial
controllers that I've found have encoder input but use it only for
stall detection. I think a continuous controlling of stepper motor
isn't a great idea due to discreet nature and relative low resulution
of stepper motors: I think that is sufficient an accidental little
movement of mechanical system respect to idle position to cause
continuous vibrations: is it correct ? My idea is to use PID only
during motion commands and stop it when axis is settled in a given
range: it will limits axis overshoot and precise positioning without
undesidered steady vibrations.
What do you think about.

Best regards.
Simone Navari.

.

Relevant Pages

  • Re: DIY CNC Machine How Hard Can It Be?
    ... With stepper control, at least, my experience has been that there is a ... And if you want the stepper to be able to go at more than a tiny fraction of ... stepper motors cannot stop suddenly without first ramping ... sometimes cutting through the first tracks. ...
    (sci.electronics.design)
  • Help with PIC selection
    ... Control 6 bipolar stepper motors with a hand pad. ... In the picture an arrow points to the three manual knobs I use to ... the world is full of educated derelicts. ...
    (sci.electronics.design)
  • Re: Stepper motor from Princess Auto?
    ... Hi Rod, ... This website is not new, but if you wish to read about stepper motors ... and their control by computers, I have yet to see anything better. ...
    (alt.machines.cnc)