Before posting this question I've been looking up google but can't find an answer to this question other than "speed control and torque control". I've done a lot of research on steppers but still don't know the relation of torque and speed. Don't get me wrong, I don't mean the relation of "increasing the speed too much, decreasing torque.". I am wondering if the speed will be constant when loaded in a bipolar setting.
For example, the stepper turns 130 rotations per minute. The stepper has a max torque output of 1Nm. When I load the stepper with 0,5Nm, does it decrease the speed? Since a stepper motor has to do certain steps, I think the speed would stay constant. I want to know if the speed will be constant or a feedback & PID control is required.
Thank you in advance!
Best Answer
A stepper motor, as the name says, moves in steps. Each step is a fixed angular movement and the number of steps per second defines the speed. It will always move at the same speed no matter what load you put on it until the load is so big that it simply can't move. At that stage it will starts to skip steps or outright stop if the load remains too high. You will hear a clicking noise when that happens.