I have a question about the voltage to drive a stepper motor 12 volts works but higher voltages make the motor weaker I am building a simple stepper driver A nema 23 2.7 amp stepper motor and 36 volt power supply The controls are hand held, forward ,reverse, stop, and speed I built the controls and driver using a 12 volt battery to test Now I completed the project and am using the 36 volt supply The motor runs at the same speed but it is so weak I can hold the shaft and stall the motor This is also the same with 36 and 24 volt batteries With a 12 volt battery I can not stall the motor I am using http://piclist.com/techref/io/stepper/SLAm/SLAm_bld.htm and an Arduino I would be happy if someone would point out my stupidity
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