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— If the wheels are coplanar (Figure 83, A),
the straightedge will evenly touch the top
and bottom of both wheels.
— If the wheels are not coplanar (Figure 83,
B), place the straightedge on the lower
wheel first (ensuring that it touches both
the top and bottom rim), then adjust the
upper wheel tracking knob to make the
upper wheel coplanar with the lower wheel.
— If the straightedge does not touch both
wheels evenly, the lower wheel needs to
be adjusted (Figure 83, C) or the upper
wheel needs to be shimmed (Figure 83,
D).
Shimming Upper Wheel
1.
DISCONNECT MACHINE FROM POWER!
2.
Make sure the top wheel is adjusted parallel
with the bottom wheel.
3.
With a straightedge touching both points of
the lower wheel, measure the distance away
from the upper wheel, which is out of adjust-
ment (see Figure 84).
4.
Remove the blade from the saw, then remove
the upper wheel.
5.
Determine how many shim washers you need
to compensate for the distance measured in
Step 3 and place them on the wheel shaft.
6.
Replace the upper wheel, the original wash-
ers, the securing screw, and the blade.
7.
Tighten the blade, then check the wheels with
the coplanarity gauge. (Wheel coplanarity
changes as the blade is tightened, so it is
best to check the wheel alignment when the
blade is tensioned as it would be for normal
operations.)
8.
When the wheels are coplanar, place a mark
on each wheel where you held the straight-
edge. This assures repeated accuracy every
time you adjust your wheels.
Note: When wheels are properly coplanar,
the blade may not be centered on the crown
of the wheel, but it will be balanced.
Model G0701 (Mfd. Since 9/17)
A
Coplanar
Gauge
Contacts Top
And Bottom of
Both Wheels
C
Not Parallel
Not Coplanar
Gauge Contacts
Wheels Unevenly
Solution:
Adjust
Lower
Wheel
Hub
Figure 83. Coplanar diagram.
Wheel Out of
Adjustment
Figure 84. Determining distance needed to shim
upper wheel.
B
Not Coplanar
Solution:
Adjust
Tracking
Knob
Gauge Only
Contacts Bottom
Wheel. Top Wheel
Needs to Be Tilted.
D
Parallel, Not
Coplanar
Solution:
Shim Upper
Wheel Out
Gauge Only
Contacts Bottom
Wheel
Difference Between
Wheels
-65-
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