
I was working with a 7502 with the issue of "motor gripping" (velocity changing on the motor creare reading issue) and I've solved that with WD-40.
But, after 5-6 days, the problem persist again.
Is the WD-40 evaporate quickly or the motor is gone?
Here's a video as reference

https://youtu.be/EYDBfWruw_c
Thank you in advance, guys and gurls ^^!