Hello Alice. How much power does motor whose torque you want to measure have? As Max just said, a good way to monitor it is through how much current and at what speed the motor is running. But if you want a more direct measurement, there are dynamic torsional load cells out there that you could use. Just google images for "torque sensor".There is an existing method. It's a simple motor on one side, torque measuring device on the other side. I put a plastic part between them, turn the motor on and write the results the torque measuring device gives me (sometimes I bring the plastic till breaking point, sometimes I measure till specific amount, etc)
I'd like the motor to be more involved and controllable. Say, it reaches a certain torque, I want it to stop automatically without me turning the switch off.
Currently the best solution I see is buy a "Rotary transformer" and put it instead of the motor. If I understand correctly a rotary transformer is kind of like a DC motor with a built-in sensor that outputs electrical output based on the torque it senses. Correct?
No. They're basically torsional load cells rotationally coupled.@Dyslexibloke
I think your suggestion sounds a little over complicated. All I want is to control a motor to stop at a certain torque.
Aren't rotary torque sensors basically DC motors with sensors? Can't I just use that coupled with a PLC?
Won't work. - Yes torque is proportional to current, but this idea totally ignores the energy stored in rotational inertia.@Dyslexibloke
I think your suggestion sounds a little over complicated. All I want is to control a motor to stop at a certain torque.
Aren't rotary torque sensors basically DC motors with sensors? Can't I just use that coupled with a PLC?
Is the torque sensing procedure of the plastic involve less than one turn of the material, or does it twist it with multiple turns?There is an existing method. It's a simple motor on one side, torque measuring device on the other side. I put a plastic part between them, turn the motor on and write the results the torque measuring device gives me (sometimes I bring the plastic till breaking point, sometimes I measure till specific amount, etc)
I'd like the motor to be more involved and controllable. Say, it reaches a certain torque, I want it to stop automatically without me turning the switch off.