Beneficts/drawbacks voltage in step motor

peirof

Hi,

a concept i have not clear….

When a step motor has more torque? (With high or low voltage)

and...

What beneficts or drawbacks have if a step motor is powered with low/high voltage?

dc42

When using constant current drivers, which are what we always use in 3D printers:

The motor torque at low speeds is determined by the motors and by the current you set them to. The driver voltage doesn't effect the torque at low speeds.
As you increase the speed, there comes a point at which the motor torque starts to reduce. This point depends on the motors and on the driver supply voltage. The higher the supply voltage, the high the motor speed before the torque starts to reduce. See https://duet3d.com/wiki/Choosing_stepper_motors#How_to_work_out_the_power_supply_voltage_you_need.