Belt drive trolley Tension Adjuster has been incorrectly tension-ed. This is a easy fix to assure that down the road the tension does not change improperly.

After the trolley adjustor has been corrected. You can see there is no chance of tension changing without notice.

Safety sensor wire that has been damaged. This snag caused a voltage issue and needs to be replaced.

shorted out safety sensors. This connection caused the sensors to not properly turn on.