Jet Tools J-7040 - Manual (Page 12)

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5. Start the motor and allow the saw to come up
to speed.
6. Slowly set the saw down onto the workpiece.
Adjust cutting speed with feed rate control
valve.
7. DO NOT DROP THE SAW HEAD OR FORCE
THE CUT. Let the weight of the saw head
provide the cutting force.
8. The saw will automatically shut off at the end
of the cut.
10.1 Coolant flow
The coolant pump must be
submerged before operating to prevent damage
to the pump.
1. The blade guides are fitted with coolant
fittings. Coolant is provided to the fittings
through interconnecting tubing. The coolant is
dispensed directly onto the saw blade.
2. Adjust the coolant flow valves on the top, rear
of the saw head as required to provide the
desired flow. The flow should be no more than
the blade can draw into the workpiece by
blade movement.
3. The coolant flow can be stopped in two ways:
1) By using the coolant pump switch on the
electrical equipment box, or
2) By closing the coolant flow valves on the
top, rear of the saw head.
10.2 Coolant mixture and quantity
The general purpose coolant is a mixture of water
soluble oil and water. Mix one part of soluble oil
(TRIM SOL) to ten parts of water (one quart oil, ten
quarts of water). Eleven quarts of coolant are
required for the coolant pump to operate properly.
There are numerous coolants on the market that
are formulated for special applications. Consult
your local distributor for details in the event you
have a long range production task, or are required
to cut some of the more exotic materials.
11.0 Adjustments
The efficient operation of the cut-off saw is
dependent upon the condition of the saw blade. If
the performance of the saw begins to deteriorate,
the first item that you should check is the blade.
If a new blade does not restore the machine’s
cutting accuracy and quality, refer to sect. 13.0,
Troubleshooting (or the blade manufacturer’s
guide) for conditions to consider and adjustments
that can be made to increase the life of the blade.
To change the blade, refer to sect. 12.3, Changing
blades. To adjust blade tracking, refer to the
following procedures.
11.1 Blade tracking adjustment
Blade tracking has been tested at the factory.
Adjustment is rarely required when the blade is
used properly or if the blade is correctly welded.
(See Figure 10 for location of blade tracking
adjustment screws.)
Figure 10: Blade tracking and tensioning
11.2 Factory or field procedure
1. Raise the saw head enough to allow the saw
motor to operate.
2. Loosen four knobs securing the blade cover.
Lift the cover and swing it backward.
3. Remove the blade guard mounted on the left
blade guide support.
4. Remove both blade guide bearing brackets.
NOTE: Maintain proper tension at all times
using the blade tensioning mechanism.
5. Loosen the center locking screws in all three
hex adjustment screws on the blade tensioning
mechanism (see Figure 10).
While performing the
following, keep the blade
from rubbing excessively on the shoulder of
the wheel. Excessive rubbing will damage the
wheel and/or the blade.
6. Start the saw. Slowly turn the single hex
adjustment screw at the rear of the tracking
mechanism to tilt the idler wheel. Do not turn
either of the other two adjustment screws.
Turn the adjustment screw until the blade is
touching the shoulder of the idler wheel.
NOTE: Turning the screw inward causes the blade
to move toward the shoulder of the wheel. Turning
the screw outward causes the blade to move away
from the shoulder.
7. Turn the single hex adjustment screw so the
blade starts to move away from the shoulder of
wheel – then turn the single hex adjustment