Fast running stepper motor
Posted: Mon Feb 24, 2014 6:53 pm
I am using a 1.8 degree stepper motor, running at 60 RPM with a drive frequency of 200Hz into the motor driver board. (an Easydriver)
I need it to reverse run at least x16 faster......960RPM with 3.2kHz.
Until last week no matter what I did ( changing drive volts up to 35 and
trying various motors of different resistances ), I could not make it run faster than 240RPM with driving frequency of 800Hz.
But yesterday I knocked up a variable freq square wave generator and found that if I started the motor slow and increased the freq slowly it now runs at over 1000 RPM, giving me the x16 rewind.
What puzzles me is that is this normal for stepper motors, to make them run fast, the drive frequency has to be increased slowly rather that suddenly switched in?
Thanks
_________________
I need it to reverse run at least x16 faster......960RPM with 3.2kHz.
Until last week no matter what I did ( changing drive volts up to 35 and
trying various motors of different resistances ), I could not make it run faster than 240RPM with driving frequency of 800Hz.
But yesterday I knocked up a variable freq square wave generator and found that if I started the motor slow and increased the freq slowly it now runs at over 1000 RPM, giving me the x16 rewind.
What puzzles me is that is this normal for stepper motors, to make them run fast, the drive frequency has to be increased slowly rather that suddenly switched in?
Thanks
_________________