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2. If the motor does not run and the red indicator of the photoelectric switch is off, you need to replace with
new materials, remove the back panel, replace the faulty components with new ones, and re-route the
wires according to the original wiring position, as shown in the figure below.
3.
If there is a small amount of displacement in the experiment module, it means that the connection
between the lifting motor and the motor synchronous belt pulley is loose. Loosen 1 fixed jackscrew
between them, coat medium-strength thread glue and then tighten them. Loosen another 1 fixed
jackscrew, coat medium-strength thread glue and then tighten them (Keep it still for more than 8 hours
after the jackscrews are tightened until they are solidified).
Note:
The height position between the motor shaft and the synchronous belt pulley shall not be changed.
One jackscrew must be perpendicular to the axial section of the motor (the axial section of the motor
can be seen from the vertical top of the synchronous belt pulley) as shown below:
Jackscrew position
Lifting motor shading plate
Lifting motor photoelectric
switch
升降电机（运
动顶板上）
Lifting motor (above the
running top plate)
Ｃｏｐｙｒｉｇｈｔ ＠Ｔｉａｎｌｏｎｇ Ｓｃｉｅｎｃｅ
Ｃｏｐｙｒｉｇｈｔ ＠Ｔｉａｎｌｏｎｇ Ｓｃｉｅｎｃｅ
Ｃｏｐｙｒｉｇｈｔ ＠Ｔｉａｎｌｏｎｇ Ｓｃｉｅｎｃｅ
Ｃｏｐｙｒｉｇｈｔ ＠Ｔｉａｎｌｏｎｇ Ｓｃｉｅｎｃｅ
Ｃｏｐｙｒｉｇｈｔ ＠Ｔｉａｎｌｏｎｇ Ｓｃｉｅｎｃｅ
Ｃｏｐｙｒｉｇｈｔ ＠Ｔｉａｎｌｏｎｇ Ｓｃｉｅｎｃｅ
