6
Use of the Miter Gauge
The miter gauge can be used on either the disc or
belt surfaces to sand accurate angles on workpieces.
When using the gauge, alone, you sand a single angle.
However, by tilting the table and using the miter gauge in
combination with the table tilt, it is possible to sand
compound angles, as well.
When grinding a compound angle you should always
check the accuracy of your setup by sanding a piece of
scrap material before doing any finish sanding on the
actual workpiece.
1. Set the angle you wish to sand using the scale on the
miter gauge.
2. Tighten the miter gauge securely so the miter reference
surface will not move while you are sanding.
3. Place the workpiece against the miter reference surface
and slide it along the reference surface and into the
sanding disc or belt. The basic method is shown in Figure
5, below.
Figure 5: Use of the miter system
Maintenance
Belt Replacement
1. Disconnect the power to the machine to prevent
accidental start-ups. If the machine is plugged into an
outlet, unplug it. If the machine is hardwired to a branch
circuit with a junction box, remove the fuse or trip the
circuit breaker to the branch.
2. Remove the lock knob and top cover (See Figure 6).
3. Remove the side guard and table.
4. Release the belt tension by turning the tension handle
in a counterclockwise direction (See Figure 7). If the
handle is difficult to turn, perform
Track Mechanism
Maintenance
according to the instructions following this
section.
5. Remove the belt.
6. Check the drums and platen for scoring or signs of wear
which might require service or replacement.
7. Check the height of the platen with a straight edge. If it
is not 1/32 in. above the drums, adjust it according to the
instructions in
Platen Replacement or Adjustment
in the
Machine Setup
section of this manual.
8. Check the drums for looseness which might cause
tracking problems. Correct any loose condition by
tightening or replacing any parts as required.
9. Slip the new belt onto the drums and platen.
10. Adjust the tension handle clockwise until the belt is flat
against the platen and there is no curling or buckling of the
belt in the middle.
11. Turn the drums by hand to see if the belt tracks
moreor- less true. JUST BECAUSE THE OLD BELT
TRACKED CORRECTLY DOES NOT MEAN THE NEW
BELT WILL. Always check the tracking when replacing a
belt.
12. To adjust the tracking:
12.1. Plug the machine back into the outlet or
reestablish power in the branch.
12.2. Loosen the tracking lock knob.
12.3. Jog the motor on and off as necessary to observe
the tracking, and turn the tracking knob as
necessary to make the belt track in the center of the
platen and drums. Turn the tracking knob clockwise to
move the belt toward the right and counterclockwise to
move the belt toward the left.
12.4. When the belt seems to be tracking correctly, turn
the motor on and leave it running while fine tuning the
tracking.
12.5. Lock the tracking lock knob.
12.6. When the lock knob is secure, turn the power
off and disconnect the machine from the outlet or
branch as in Step 1, above.
13. Replace the table, side guard, top cover and lock knob
by reversing steps 3 and 2, above.
14. If you have not already done so, reconnect the power
to the machine and return it to service.
To p c o v e r
To p c o v e r lo c k sc re w
Tra c k a d ju stin g k n o b
Tra c k in g lo c k k n o b
B e lt
Figure 6: Top cover components
Содержание BTM250
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