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If you are looking to monitor the torque of the stepper motor, you may want to look into using a RotaryEncoders
It may be difficult to monitor the current on the stepper motor as the current is being pulsed through the coils to move the motor How to Drive a Stepper Motor - Electromechanical / Motors, Actuators, Solenoids and Drivers - Electronic Component and Engineering Solution Forum - TechForum │ DigiKey