Adjust the Tensioning Belt.
STEP 1：
Loosen the two smallscrews counterclockwise (do not need to be completelyremoved).
STEP 2：
Loosen the retaining nut of the long screw with wrench.
STEP 3：
Turn in the screws in the figure clockwise (be carefulnot to screw too much, so as not to puncture the slide belt).
- Stop when you feel a little resistance.
STEP 4：
Tighten the two smallcrews clockwise
STEP 5：
Loosen the long screws a bit
Please note don’t tighten the retaining nut too much otherwise it will cause the plastic parts to break..
Please refer to the video below for specific instructions
(38) QIDI X-Smart3 | How to adjust XY axis belt tightness - YouTube
Please make sure that both the top and bottom belts are adjusted and confirm the tension is about the same when pulled by hand.
