Motors Jammed Error message - never found the reason why

Hi everyone,

I saw some very old postings from several people regarding the jammed motor error (e.g., More unsubstanciated error messages). I got this error message every couple of minutes, sometimes every layer.

Though we are now using a 3L, I never threw away our old Form 2. And today I finally found some time to try to repair the old Form 2. The only thing I could find was a very dirty linear bearing element on the front side, that is responsible for keeping the wiper and the tank moving smoothly. I cleaned everything, every ball bearing ball, and also smoothened the surface of the metal rail, and added new grease.

I don’t know if that will help, I am waiting for my test-prints, 7 of 400 layers without error message.

Did any of you ever found out why your printer had those errors, and what did you do to solve the problem?