Promac 322BE1-BP Manual page 12

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ASSEMBLY CHART-SANDING BELT DEVICE
3
1. Lock protection
5
4
BELT BALANCE
1.
Turn Tracking knob clockwise to make sanding belt
toward right side or turn counter-clockwise to make
belt toward left side Note: It is only allowed a tiny
adjustment at each turn.
2.
Rotate belt by hand, meanwhile adjust tracking knob.
3.
Control the switch for a short on/off starting with left
hand. Meanwhile put right hand on tracking knob
for clockwise or counter turning till the belt runs
stably between the two rollers.
BELT TENSION ADJUSTMENT
1.
Be sure switch is on OFF position.
2.
Test Belt tension from the back by thumb press.
3.
If the tension is not high enough for working, may begin the
following procedures:
3.1. Turn the belt tension knob clockwise about 120∘and
remove the sanding belt from rollers.
3.2. Open the cover where the position is located down the
tracking knob.
3.3. Clockwise loosen the hex. Nut (part No.57) by a supplied
12mm open spanner.
3.4. Turn adjusting rod (Part No.58) clockwise to increase belt
tension.
NOTE:
a. Each clockwise turning of adjusting rod makes aluminum
roller upward 2.5mm, and each counter turning shall
make the roller downward 2.5mm.
b. Normally it is unnecessary to make a whole turning of
2.5mm micro adjustment is always recommended. Each
edge turning of the hex. Adjusting rod makes aluminum
roller upward or downward 0.42mm.
3.5. Counter-clockwise tighten the hex. Nut (Part No. 57) to fix
the position of adjusting rod. 3-6 Close the cover
4.
Locate sanding belt on the center of two rollers.
5.
Repeat the procedures of belt balance of the fig.4 (page 5).
12

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