It can sometimes be due to the steppers getting to hot or if you have a travel speed to high.
You can prove if any of the pulleys are slipping buy marking the shafts and pukkeys and checking them after it has skipped. If this is ok and it's always after about 1 hour I would think that they are over heating.
Recommended Posts
neotko 1,417
Did you check also the pulleys on the motors? Also check if the belts have any oil, if so clean with alcohol.
Link to post
Share on other sites