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12.5 Blade grinding
Keep
rotating grinding wheel. Failure to comply may
cause serious injury. Always heed the indicator
light – when glowing, it warns that the grinder
motor is running.
After annealing, the blade must be ground to
remove excess metal or flash from the weld. With
the teeth facing out, grind the weld carefully (Figure
16). Do not hit the teeth, or grind deeper than the
weld, burn, or overheat the weld area. Be sure to
remove flash from back edge of blade. Any flash or
"stub" teeth which project beyond the normal set or
height of the other teeth must be ground off.
Figure 17 illustrates some unacceptable grindings.
Figure 16
Figure 17
12.6 Secondary Annealing
Anneal the weld 2 to 3 times again after grinding.
12.7 Welder Clean-Up
It is important that the welder jaws be kept clean at
all times. The jaws and inserts must be wiped or
scraped clean after every weld. Doing this will
ensure better welds by:
1. Holding proper alignment.
2. Preventing flash from becoming embedded in
the blade.
3. Preventing shorts or poor electrical contact.
hands
away
from
13.0 Band saw operation
Consult section 9.0 for identification of the controls.
Unlock the control panel using the provided key.
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).
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.
handwheel only when machine is running.
14
Never
operate
band
Move gear shift lever only
Rotate
speed
saw
setting
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