¶ 1. Phenomenon
¶ 2. The method of investigation
¶ (1). Make sure that there is no obvious resistance when sliding the slider, and use grease to fully lubricate the optical shaft and the slider; the slider is not loose
¶ (2). Make sure that the belt tightness of the three axes is as consistent as possible; the belt is not worn or stretched
¶ Mediation Belt Video Link:
¶ 3. Make sure the nozzle is tightened and the nozzle is not worn
