Use and Care Manual

15
11. Close back cover and secure with knobs.
12. Install red blade guard, and brush assembly.
13. Connect machine to power source.
14. Run machine to verify that blade is tracking
properly. See section 9.8, Blade tracking.
9.7 Blade tension
Disconnect machine from
power source, and use caution when working
with sharp blade.
Blade tension is vital to achieving proper results
from the band saw. For shipping purposes, the
blade may not be at full tension – verify tension
before operating.
Proper blade tension is 1550 to 1760 kg/cm
2
(22000-25000 lb/in
2
) as measured on a blade
tension gauge (not provided).
To set tension without the use of a tension gauge:
1. Disconnect machine from power source.
2. Install blade between wheels and between
bearings on blade guides.
3. Lightly tension blade to remove any sag by
turning handle (C, Figure 20) slightly
clockwise.
4. Turn tension handle (C, Figure 20) 1-3/4 to two
revolutions clockwise. This is equivalent to 800
kg (1764 lb) of blade tension.
Do not overtighten blade;
this may cause it to stretch or warp.
5. Close covers, connect to power source, and
run saw for 2 to 3 minutes to allow blade to
seat properly.
6. Disconnect machine from power source. Open
cover and loosen blade until it just begins to
sag.
7. Tighten blade until it straightens between
blade wheels and all sag is eliminated.
8. Tighten blade by turning handle (C, Figure 20)
two full revolutions.
TIP: Slacken blade tension when finished with
operations, to prolong blade life. Make note of
indicator position on tension label (D, Figure 20) for
quickly returning tension to its previous setting.
9.8 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 9.7 Blade tension.
3. Open back cover.
While performing the 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 (E, Figure 21), but do not remove.
6. Turn set screw (F, 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
blade to respond to the changes.
Figure 21
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.