Jet VBS-2012, Operating Instructions And Parts Manual

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2. Preventing flash from becoming embedded in
the blade.
3. Preventing shorts or poor electrical contact.
13.0 Band saw operation
Consult section 9.0 for identification of the controls.
Unlock the control panel using the provided key.
Never operate band saw
without blade and wheel covers in place and
secured.
13.1 Blade break-in procedure
New blades are very sharp and therefore have a
tooth geometry that 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. The following
procedure will be adequate, however, for break-in
of JET-supplied blades on lower alloy ferrous
materials.
1. Use a section of round stock.
2. Operate the saw at low speed. Start the cut
with a very light feed rate.
3. When the saw has completed about 1/3 of the
cut, increase the feed rate slightly and allow
the saw to complete the cut.
4. Keep the feed rate at the same setting and
begin a second cut on the same or similar
workpiece.
5. When the saw has completed about 1/3 of the
cut, increase the feed rate while watching the
chip formation until cutting is at its most
efficient rate (refer to “Evaluating Cutting
Efficiency” below). Allow the saw to complete
the cut.
6. The blade is now considered ready for use.
13.2 Setting blade speed
1. Refer to Speed and Pitch chart in section 16.0.
Select speed setting for the material to be cut.
2. While machine is NOT running, move gear
shift lever (B, Figure 2) to required speed
setting (high or low).
Move gear shift lever only
when machine is NOT running, to prevent
damage to gearbox.
3. Start saw using the pushbutton.
4. Turn speed setting handwheel (C, Figure 2) to
required speed. Turning handwheel clockwise
increases speed; counterclockwise decreases
speed.
Rotate speed setting
handwheel only when machine is running.
13.3 Evaluating cutting efficiency
The best way to determine whether a blade is
cutting efficiently is to observe the chips formed by
the cutting.
•
If chip formation is powdery, then the feed rate
is too light, or blade is dull.
•
If the chips formed are curled, but colored –
blue or straw colored from heat generated
during the cut – then feed rate is excessive.
•
If chips are slightly curled and not colored by
heat, then the blade is sufficiently sharp and is
cutting at its most efficient rate.
14.0 Maintenance
Before doing maintenance on
the machine, disconnect it from the electrical
supply by pulling out the plug or switching off
the main switch. Failure to comply may cause
serious injury.
Use a brush to loosen accumulated chips and
debris. Use a shop vacuum to remove the debris.
Make sure the chip brush on the lower band wheel
is properly adjusted.
If the power cord is worn, cut, or damaged in any
way, have it replaced immediately.
Wipe off the rubber tires, and clean the tables after
each day’s use.
14.1 Lubrication schedule
•
Upper Blade Guide Shaft – lightly grease
weekly. Clean after each day's use.
•
Speed Change Handle – grease monthly with
a light film on teeth and threads.
•
Variable Pulley - insert a light weight grease
into the grease fitting located on end of pulley
shaft.
•
Blade Tension Screw – grease monthly.