4.
Use screws to the set the tightness of the timing belts on the left and right plates.
Note:
○ The longest screws are used to set the tightness of the timing belts. Do not fully
tighten them. Otherwise, the timing belts may be damaged.
○ Make sure that you set the timing belts on the left and right plates with the same
tightness. Otherwise, materials can't be engraved properly.
5. Fit the middle plate.