Glideforce w/ feedback: potentiometer length and repeatability

Support Motor controllers/drivers and motors
1

I have a Glideforce GF23-120502-3-65 linear actuator with pot feedback and 2" stroke. I have 2 questions/concerns:

  1. It appears that only about 40% of the potentiometer is being used over the full stroke length (~0.4 kOhm fully retracted to ~4.7 kOhm fully extended for the 10 kOhm pot). Is this normal? I was expecting the entire pot to be used.

  2. The readings are not repeatable. For example, when fully extending the motor the readings may vary by up to ~10% over multiple iterations. Is there an explanation for this other than a bad/loose pot?

Thanks!

2

Hello.

The potentiometer range you are measuring is normal for the 2" stroke length.

Could you clarify what you mean when you say the readings vary by up to 10%? For example, are you seeing variation as much as 400Ω (which would correspond to a positional uncertainty of 0.2″), or are you seeing variation on the order of 40Ω (which would correspond to a positional uncertainly of 0.02″)

Brandon