Blade Tracking; Test Cutting To Verify Adjustment - Jet HVBS-710SG Operating Instructions And Parts Manual

for quickly returning tension to its previous
setting.

9.9 Blade tracking

Tracking the blade requires
that the band saw be operating while the
back cover is removed. This adjustment
should be performed by qualified persons
only.
Blade tracking has been tested at the factory.
Adjustment is rarely required when the blade is
used properly and if the blade is correctly
welded. If a tracking problem occurs, first
inspect blade condition, then adjust tracking as
follows:
1. Raise bow to vertical position and secure by
turning off hydraulic cylinder valve.
2. The blade should be properly tensioned.
Refer to section 9.8 Blade tension.
3. Open back cover.
While
following steps, keep the blade from rubbing
excessively on wheel flange. Excess rubbing
will damage wheel and/or blade.
4. Start saw and observe blade movement.
Blade should run next to, but not tightly
against, wheel flange.
5. If blade will not track in position, loosen
screws (F, Figure 21), but do not remove.
Figure 21
6. Turn set screw (G, Figure 21) counter-
clockwise so that blade starts to move away
from the flange; then immediately turn set
screw in the other direction so that blade
stops, then moves slowly back toward
flange. NOTE: This adjustment is sensitive;
do it gradually and in small increments
allowing the wheel to respond to the
changes.
performing the
16
Keep fingers clear of blade
and wheel to avoid injury.
7. Turn set screw to stop shifting of blade on
the wheel as it gets closer to wheel flange.
Put a six-inch length of paper between blade
and wheel. The paper should not be cut as it
passes between wheel flange and blade.
8. Turn set screw a small amount. Repeat the
insertion of paper between wheel flange and
blade until paper is cut into two pieces.
NOTE: You may have to repeat the check
with the paper several times before the
blade and the flange cut the paper into two
pieces. Do not
Patience and accuracy here will pay off with
better, more accurate, quieter cutting and
longer machine and blade life.
9. When the paper is cut, back off the set
screw slightly. This assures that the blade is
not touching the flange of the wheel.
10. Tighten two screws (F, Figure 21).

9.10 Test cutting to verify adjustment

Test cuts can be used to determine whether or
not you have adjusted the blade accurately. Use
2-inch round bar stock to perform these test
cuts, as follows:
1. With bar stock securely clamped in the vise,
make a cut through the bar stock. (See
Figure 22.)
2. Mark the top of the bar stock.
3. Move the bar stock about 1/4-inch past the
blade so that you can begin a second cut.
4. Rotate the bar stock 180 degrees so the
mark you made is now at the bottom of the
cut.
5. Make a cut through the bar stock.
6. Use a micrometer to measure the thickness
variation of the disk you have cut from the
bar stock. Measure at top and bottom of
disk.
hurry the adjustment.