Full Product Manual

18
10.0 Operating controls
To start saw, toggle switch (C, Figure 27) to ON.
To stop saw before it reaches the end of cut, toggle
switch (C) to OFF. Otherwise, saw will
automatically stop at the end of a cut.
Toggle the coolant switch (D, Figure 28) to ON.
Flow of coolant to blade area is controlled by the
taps connected to the blade guide assemblies.
Figure 28
IMPORTANT: When cutting magnesium, never
use soluble oils or emulsions (oil-water mix) as
water will greatly intensify any accidental
magnesium chip fire. See your industrial coolant
supplier for specific coolant recommendations
when cutting magnesium.
11.0 Operation
11.1 Pre-Operation inspection
Give machine an overall inspection and verify the
following:
1. Guards and covers are in place and in working
order.
2. Blade tooth direction matches diagram on
bow.
3. Blade is properly tensioned, and tracking
correctly on wheels.
4. Side and rear blade guide bearings are
properly adjusted.
5. Coolant level is sufficient.
6. Gearbox is properly lubricated.
7. Do not begin cut on a sharp edge; file edge
first.
11.2 Blade break-in procedure
New blades are very sharp and, therefore, have a
tooth geometry which is easily damaged if a careful
break-in procedure is not followed. Consult the
blade manufacturer’s literature for break-in of
specific blades on specific materials. However, the
following procedure will be adequate for break-in of
JET-supplied blades on lower alloy ferrous
materials.
1. Clamp a round section workpiece in the vise.
The workpiece should be 2 inches or larger in
diameter.
2. Set the saw on low speed. Start the cut with a
very light feed rate.
3. When the saw has completed 1/3 of the cut,
increase the feed rate slightly and allow the
saw to complete the cut.
4. Keep the same hydraulic cylinder setting and
begin a second cut on the same or similar
workpiece.
5. When the blade has completed about 1/3 of
the cut, increase feed rate. Watch the chip
formation until cutting is at its most efficient
rate and allow the saw to complete the cut
(see section 11.4, Evaluating cutting
efficiency).
6. The blade is now ready for regular service.
11.3 General operating procedure
1. Raise bow until it will clear workpiece by a few
inches, and close hydraulic cylinder valve to
secure it in place.
NOTE: Never start a cut with blade
contacting workpiece.
2. Place workpiece in vise and tighten vise. The
workpiece should be fitted directly between the
jaws without adding other objects.
When workpiece to be cut is a profiled section,
flat piece or special shape, refer to examples
in Figure 29 for proper clamping positions. The
top row shows acceptable clamping positions;
the bottom row shows unacceptable positions.
If thickness of profiled section is very thin, a
piece which duplicates the profile should be
fitted inside the workpiece itself, to prevent
workpiece being crushed between the jaws.
Figure 29
Never hold a workpiece by
hand when cutting it – the workpiece should be
firmly secured in the vise. Do not reach into the
cutting area during cutting operations.