# 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.

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
283
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

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