Instructables

how to find torque of a rotating actuator shaft..

am doing a project on developing a instrument helps finding the torque value of a actuators rotating shaft before fitting it to the valve ....

lemonie3 years ago

What units are used to quantify torque...?
You could build a length-weight rig (pic), but be warned that if you test things to their limits you put them under maximum load/stress.

L
t.bmp
seandogue3 years ago
Pardon, but why do you need to determine the value empirically for end-use? I would simply use the actuator mfg data to determine the baseline and make sure I choose an actuator with slightly more torque than is required. It's final strength can be modified by use of PWM or similar.
Sounds like he wants to know if its the RIGHT torque, so the actuator will operate the valve.
Understood, not taking issue with your suggestion, but still, the problem sounds like an issue of finding out the required torque for the valve, rather than that supplied by a rotating actuator (presumably a rotary solenoid or similar), which can be specified to a vendor or selected from a catalog or website, prior to purchase, once the required value is known.
Ah, I've read it bass-ackwards.
Agreed.
Steve
React it against springs in a rotating frame, measure the displacement.