Adjusting Blade Oscillation - Jet JWSS-22B Operating Instructions Manual

4. Place a machinists square or other 90-degree
measuring device on table and against blade
(Figure 20). Do not deflect blade by pushing into
it.
Figure 20: inspecting blade squareness
5. If side of blade does not lie flush against square,
first check that the set screws (see G, Figure
17) protrude evenly into the clamping area.
Adjust if needed.
6. If blade is still not perpendicular, loosen eight
screws on trunnion plates, at front and back of
saw (Figure 21)
7. Nudge trunnion/arm assembly until side of
blade is flush to square.
8. Tighten all screws at front and back.
9. If needed, loosen screw on pointer (K) and
adjust it to zero. Tighten screw.
Figure 21: squaring blade to table

9.7 Adjusting blade oscillation

Refer to Figure 22.
Blade movement can be adjusted to accommodate
different wood stock and types of operations. For
example, for faster, more aggressive cutting the
blade can be adjusted for slight backward
movement on the upstroke, and slight forward
movement into the wood on the downstroke. For
slower, fine detail work and more control,
completely vertical blade movement is often
preferred.
This adjustment is based upon user's preference; as
the scroller gains experience, he/she will get a feel
for the oscillation that is most efficient for the work
at hand.
1. Turn off saw and remove blade.
2. First verify that upper arm is parallel to table
surface (Figure 22). Push arm down, and
measure at front and back of arm; if
measurements
adjustment knob (L) until upper arm is parallel.
Figure 22: arm/table parallelism
3. Adjustments to blade oscillation can be subtle;
place a square or block of wood on table and
alongside blade as reference.
4. Loosen screws on motor flange (M, Figure 23)
with 4mm hex wrench. Only loosen screws
enough to allow motor rotation.
5. Turn motor shaft (N, Figure 23) with flat-blade
screwdriver
Alternatively, you may turn on saw to slowest
speed to observe blade motion.
Figure 23: blade oscillation
14
are different, rotate
to observe blade
arm
motion.