Shimming.upper.wheel, Se rv ic e – Woodstock W1770 User Manual

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W1770 21" Bandsaw w/Foot Brake

—

.If the wheels are coplanar (Figure.75, A), the

straightedge will evenly touch the top and bottom

of both wheels.

—

.If the wheels are not coplanar (Figure.75, 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 and parallel with

the lower wheel.

— If the straightedge does not touch both wheels

evenly, the lower wheel needs to be adjusted

(

Figure.75, C) or the upper wheel needs to be

shimmed (

Figure.75, D).

Shimming.Upper.Wheel

1. DISCONNECT BANDSAW FROM POWER!

2. Make sure the top wheel is adjusted parallel with

the bottom wheel.

3. With

a straightedge touching both points of the

wheel that does not need to be adjusted, measure

the distance away from the wheel that is out of

adjustment (see

Figure.76).

4. Remove the blade from the saw, then remove the

wheel that needs to be shimmed.

5. Determine how many shim washers you need to com-

pensate for the distance measured in

Step.3 and

place them on the wheel shaft.

6. Replace the wheel, the original washers, the secur-

ing 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 straightedge. 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.

Coplanar

Parallel, Not

Coplanar

Not Coplanar

Gauge

Contacts Top

And Bottom of

Both Wheels

Gauge Only

Contacts Bottom

Wheel

Gauge Only

Contacts Bottom

Wheel. Top Wheel

Needs to Be Tilted.

Gauge Contacts

Wheels Unvenly

Coplanarity Gauge

Solution:

Shim Upper

Wheel Out

Not Parallel

Not Coplanar

Solution:

Adjust

Lower

Wheel

Hub

Solution:

Adjust

Tracking

Knob

Figure.75. Coplanar diagram.

Figure.76. Determining distance needed to

shim upper wheel.

Difference

Between Wheels

Wheel Out of

Adjustment