Speed Problem of Bipolar stepper motor

Discussion in 'The Projects Forum' started by srikanthala, Jan 7, 2009.

  1. srikanthala

    Thread Starter New Member

    Jan 7, 2009
    2
    0
    Hi

    I am developing product in automation and i am using L297 & L298 combination.
    when i am trying to increase the spped with clk signal the motor is getting struc and it is running well in the lower frequencies (2000Hz). my requirment is to run at 10000Hz.

    Please suggest me some solution

    Thanks & Regards
    Srikanth Ala
     
  2. Alberto

    Active Member

    Nov 7, 2008
    169
    36
    How many steps per turn?
    Are you using accelleration ramp?
    Are you keeping the current costant? Higher the speed higher the voltage you should apply to compensate the increasing inductance of the motor.

    Alberto
     
  3. mik3

    Senior Member

    Feb 4, 2008
    4,846
    63
    Stepper motors need some time to move from one step to the other. You can't run the motor faster than this, so you can't increase the frequency as far as you want. Check the motor specifications for this parameter.
     
  4. beenthere

    Retired Moderator

    Apr 20, 2004
    15,815
    282
    You may find that the maximum rate is 5000 steps/second. Most steppers don't turn very fast.
     
  5. srikanthala

    Thread Starter New Member

    Jan 7, 2009
    2
    0
    Thanks for the reply,

    Yes, i gone through some meterial and i undersatnd that, we need to increase like ramp.

    The related fomula is:

    C0 = 4000;

    c(n) = C(n-1) -( 2*c(n-1)/4*n+1));
    TACCR0 = C(n);

    this will generate the ramp speed with Timer.

    Once angain thanks for the Reply.

    Regards
    Srikanth Ala
     
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