I recently purchased 4 of these with the break out board to power some Nema 34
(Nema 34 stepper motor 1232 oz.in bipolar. part no 34HS1456 )
steppers all was going well, I started with 12 volts and a low amp setting, and then went to 24 volts at low amps, I upped the speed of the stepper and then the board burnt out badly,..
The supplier said he will replace it, so that was good, however
I can only think that the more pulse ( steps ) a motor gets the more power is being taken
so the hotter things get
my concern is will it be Ok to run my Nema 34 on 12 volts???
as this was in the e-mail that he replied with

Nema 23/24 stepper motors, we would suggest you to use 24~36V DC power supply. Because if the voltage is too low, it may burn the driver.,,,<<< is this true???

the driver is rated as follows
  • 12~24V DC power supply for Nema 17 stepper motors.
  • 24~36V DC power supply for Nema 23/24 stepper motors.
  • 36~45V DC power supply for small-sized Nema 34 stepper motors.

thanks for any help
Stevep