9
2. Loosen knob and raise upper guard (see Figure
7-2). Open side panel by turning its knob and
lowering panel on its hinges.
3. Loosen clamp handle on head casting. See
Figure 7-1.
4. Install pivot shaft of platen (or shaft of wheel) all
the way into head casting, as shown in Figure
7-1.
5. Position platen as desired:
•
For grinding flat or angular workpieces,
position platen with platen surface facing
outward.
•
For grinding of cylindrical workpieces,
position platen with “yoke” side facing
outward.
6. Set platen at desired angle and tighten clamp
handle.
7. Install and track the abrasive belt (see sect. 7.3
and 7.4).
8. Raise tension lever to set belt tension.
Do not
overtighten.
9. Bring upper guard down into position and adjust
so that it will not contact abrasive belt. Tighten
upper guard knob.
10. Adjust work rest to 1/16 inch from belt.
Platen wheel adjustment
The platen wheels have eccentric shafts, which
allow adjustment of the wheels tangent to the
surface of the platen.
Turn one or both screws (A, Figure 7-1) to adjust.
Figure 7-1: installing platen assembly
Installing/replacing grinding belt
Do not operate machine with
side panel open.
1. Lower belt tension lever (see Figure ---) to
release tension on belt.
2. Loosen knob and raise upper guard (see Figure
7-2). Open side panel by turning its knob and
lowering panel on its hinges.
3. If required, loosen work rest to provide
clearance for belt removal.
4. Remove belt from drive wheel, idler wheel, and
contact wheel. Install replacement belt centered
over drive wheel, idler wheel, and contact
wheel. Make sure direction arrows on belt
match machine operation.
5. Raise belt tension lever to tighten belt against
the wheels. Tighten belt until it is just taut. Do
not over-tension the abrasive belt. A moderate
tension will provide faster cutting, longer belt
life, and better tracking.
Excessive belt tension will
reduce belt life and cause excessive wear
of contact wheel bearings.
Belt tension
should only be sufficient to allow proper
tracking.
6. Check belt tracking; see
sect. 7.4
.
Figure 7-2: belt replacement
Belt tracking
Do not operate machine with
side panel open.
1. Loosen knob and raise upper guard. Open side
panel by turning its knob.
2. Spin drive wheel by hand and check tracking of
belt. If belt tracks to right or left, adjustment is
required.
3. Turn idler adjust screw (Figure 7-3) clockwise to
cause belt to track right. Turn idler screw
counterclockwise to cause belt to track left.
Perform this in small increments and allow belt
to respond to the changes.
4. Close side panel and secure by turning knob on
panel. Lower upper belt guard and secure with
knob.
Upper guard
Idler wheel
Contact wheel
Side panel
Drive wheel
Platen
Clamp
handle
Pivot
shaft
A
A
