Significant Voltage Drop in Long-Cable, High-Current Transmission
Posted: Tue Oct 27, 2026 8:26 am
Hello everyone. I am using a NEMA 52 stepper motor (https://www.oyostepper.es/category-66-b ... MA-52.html) located about 15 meters away from its driver. The cable gauge was selected based on the motor's rated current.
Recently, I’ve noticed a significant lack of torque during high-speed operation, leading to missed steps under load. While the voltage at the driver's output terminals is normal, the voltage at the motor's connection terminals drops considerably at high speeds—indicating a substantial voltage drop across the cable. The cable also becomes noticeably hot.
Could you please advise on how to calculate the appropriate wire gauge and voltage drop for high-current stepper motor connections over long distances? Should I use a thicker cable, or would it be better to move the driver closer to the motor?
Thank you.
Recently, I’ve noticed a significant lack of torque during high-speed operation, leading to missed steps under load. While the voltage at the driver's output terminals is normal, the voltage at the motor's connection terminals drops considerably at high speeds—indicating a substantial voltage drop across the cable. The cable also becomes noticeably hot.
Could you please advise on how to calculate the appropriate wire gauge and voltage drop for high-current stepper motor connections over long distances? Should I use a thicker cable, or would it be better to move the driver closer to the motor?
Thank you.