speed of stepper motor!!

[tech_vaibhav_eee]

k..thanks 4 all the replies..i will work on all that tomorrow and will update u on my progress..

 

[tech_vaibhav_eee]

i worked on the stepper today..well i accelarated the motor as u said and the results i got are:
the max. rpm it is giving is 20 no matter how quickly or slowly i accelarate it.(i tried to accelarate it from 1rpm to 30 rpm but it gives max. of 20 rpm..)
this rpm is independent of the input com. voltage.(i trid from 6v to 20v and only the torque changes on changing the voltage)..

so, should i assume that the max. rpm of the stepper is 20 or it can be increased in any other way??
how do we generally check the max. rpm of a stepper?
is placing resistors a solution??
@duffy..looking forward 4 a reply..thanks in advance..
@others..please read the prev. posts for specifications of my motor and driver.

 

[blueroomelectronics]

Contact the manufature and inquire about the maxium RPM. Steppers tend to be low RPM motors as they're designed for controlled rotation.

 

[duffy]

Yes, steppers don't run nearly as fast as a brush-type motor.

 

[tech_vaibhav_eee]

k..assuming that the max. rpm is near to 40..how can i extract max. rpm??

 

[blueroomelectronics]

k..assuming that the max. rpm is near to 40..how can i extract max. rpm??

Contact the supplier or manufacture. What made you assume it was 40?

 

[tech_vaibhav_eee]

i got the steppers from somewhere long time back and i dont remember the supplier..is there any other way to know the max. rpm...anyways there must be some way to speed up the motor.?

 

[duffy]

This is stupid, but sometimes works - loosen the set screw on the motor shaft coupling.

 

[tech_vaibhav_eee]

what generally is the max. rpm of a 12v 500ma unipolar motor...1.8degree step angle...

 

[blueroomelectronics]

Read this thread.
**broken link removed**