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

Figure 17: 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 18)
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 18: squaring blade to table

6.7 Adjusting blade oscillation

Refer to Figure 19.
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 unplug.
2. First verify that upper arm is parallel to table
surface (Figure 19). Push arm down, and
measure at front and back of arm; if
measurements are
adjustment knob (L) until upper arm is parallel.
Figure 19: 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 20)
with 4mm hex wrench. Only loosen screws
enough to allow motor rotation.
5. Turn motor shaft (N, Figure 20) with flat-blade
screwdriver to observe
Alternatively, you may turn on saw to slowest
speed to observe blade motion.
Figure 20: blade oscillation
different, rotate arm
blade motion.