42 Motor Phase Current
Posted by
Joe Vicars
on 2000-12-11 06:25:35 UTC
From the literature I have been able to find it seems that a NEMA 42
stepper with coil resistance of .4 ohms has a phase current rating of
about 6-7 amps
My question is how strictly do you have to adhere to this current
rating? I was under the impression that even a brief over-current could
damage a motor. BUT, in my literature for th Anaheim Bi-Level drivers,
they say to set the "Kick Current" to 1.4 times the motor's rated
current. The motor runs at the Kick Current level during starting and
high speed. At standstill and low speed, the drive switches to a lower
voltage. Thus "Bi-Level".
I fried a 34 single stack with these same drivers so I am a little
scared of ruining a 400 dollar motor.
Advice?
P.S. I can't wait for Mariss to come out with those 180VDC
drivers!!!
stepper with coil resistance of .4 ohms has a phase current rating of
about 6-7 amps
My question is how strictly do you have to adhere to this current
rating? I was under the impression that even a brief over-current could
damage a motor. BUT, in my literature for th Anaheim Bi-Level drivers,
they say to set the "Kick Current" to 1.4 times the motor's rated
current. The motor runs at the Kick Current level during starting and
high speed. At standstill and low speed, the drive switches to a lower
voltage. Thus "Bi-Level".
I fried a 34 single stack with these same drivers so I am a little
scared of ruining a 400 dollar motor.
Advice?
P.S. I can't wait for Mariss to come out with those 180VDC
drivers!!!