Product Manual

10
Figure 7-3: carbide guide adjustment
7.4 Blade tension and tracking
Refer to Figure 7-4.
7.4.1 Tension
Blade tension has been set by manufacturer at
approximately 1800 kg/cm2 (25,000 psi) for the
supplied blade. Turn handwheel (C, Figure 7-4)
clockwise; if collar (N) slips out of position, then
blade is properly tensioned. Continue turning
handwheel until collar re-engages. NOTE: Simply
turn handwheel, do not press on it.
If tension mechanism will not move blade, loosen
and then re-tighten socket head cap screws on gibs
(X, Figure 7-3).
7.4.2 Tracking
Tracking is performed with
wheel covers open and blade moving. Use
extreme caution so that you do not come into
contact with blade.
Blade tracking has been set by manufacturer.
Adjustment is rarely required when blade is used
properly and is correctly welded.
Tracking is set properly when back of blade lightly
touches shoulder of wheels. Note: Over-tracking
(allowing blade back to rub hard against wheel
shoulder) may damage blade wheels and blade.
If blade is not tracking properly:
1. Raise bow enough to allow saw motor to
operate.
2. Open wheel cover and remove left blade guard.
3. Back off left and right bearing guide assemblies.
NOTE: Maintain proper tension at all times
using the blade tensioning mechanism.
4. Loosen center locking screws (O, Figure 7-4) in
all three hex adjustment screws (P) on
tensioning mechanism.
Figure 7-4: blade tension and tracking
While performing the
following, keep blade from excessively
rubbing on wheel shoulder, which may
damage wheel and/or blade.
5. Start saw. Slowly turn single hex adjustment
screw (P
1
) to tilt idler wheel. Do not turn either
of the other two adjustment screws. Turn
adjustment screw until blade is touching
shoulder of idler wheel.
NOTE: Turning screw inward causes blade to
move toward wheel shoulder. Turning screw
outward causes blade to move away from
shoulder.
6. Turn single hex adjustment screw (P
1
) so blade
starts to move away from wheel shoulder. Then
immediately turn single hex adjustment screw in
opposite direction so that blade stops, then
moves slowly toward shoulder.
Keep fingers clear of blade
and wheel to avoid injury.
7. Turn single hex adjustment screw (P
1
) to stop
motion of blade on wheel as it gets closer to
wheel shoulder. Put a 6-inch length of paper
between blade and wheel. The paper should
not be cut as it passes between wheel shoulder
and blade.
8. Turn single hex adjustment screw (P
1
) a small
amount. Repeat insertion of paper between
wheel shoulder and blade until paper is cut in
two pieces. NOTE: You may have to repeat the
check with the paper several times before blade
and shoulder cuts paper into two pieces. Do not
hurry this adjustment; patience and accuracy
here will pay off with better, more accurate,
quieter cutting and much longer machine and
blade life.
9. When the paper is cut, turn hex adjustment
screw (P
1
) slightly counterclockwise. This
assures that blade is not rubbing excessively
against wheel shoulder.
10. Shut off saw.