56
Maintenance
8.12
Check tension and wear of belts
Maintaining correct tension on the belts is important to ensure good print quality. The belts transfer the
movements of the motors to the slides. If the belts are too loose, print head movement may not be accurate,
which can cause print inaccuracies. Over time, the belts may become slack. It is recommended to check the
tension of the belts at least once every three months. Pluck the three belts to check their tension. They should
resonate, like a guitar string. Furthermore, the tension of the three belts should be equal.
To restore the tension, perform the following steps:
1.
Home the printer (make sure the slides are all the way up)
2.
Loosen the bolts of the idler pulley with only 2 turns (don’t unscrew them completely)
3.
Push the idler unit firmly down with your thumb
4.
Tighten the two screws of the idler pulley unit again to fix it.
