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Blade Care &
Break-in
Blade Care
to prolong blade life, always use a blade with the
proper width, set, type, and pitch for each applica-
tion. Maintain the appropriate feed rate, feed pres-
sure, and blade speed and pay attention to the
chip characteristics (refer to the Chip inspection
Chart on page 31). Keep your blades clean, since
dirty or gummed up blades pass through the
cutting material with much more resistance than
clean blades, causing unnecessary heat.
Blade Break-in
the tips and edges of a new blade are extremely
sharp. Cutting at too fast of a feed rate or too
slow of a blade speed can fracture these tips and
edges, quickly dulling the blade. properly break-
ing-in a blade allows these sharp edges to wear
without fracturing, thus keeping the blade sharp
longer. Below is a typical break-in procedure. For
aftermarket blades, refer to the manufacturer's
break-in procedure to keep from voiding the war-
ranty.
use the Chip inspection Chart on page 31 as
a guide to evaluate the chips and ensure that
the optimal blade speed and feed rate are being
used.
to properly break-in a new blade:
1.
Choose the correct speed for the blade and
material of the operation.
2.
reduce the feed pressure by half for the first
50–100 square inches of material cut.
3.
to avoid twisting the blade when cutting,
adjust the feed pressure when the total width
of the blade is in the cut.
Model g0717 (Mfg. since 9/10)
Downfeed
downfeed is controlled by two knobs on the con-
trol panel.
to set the feed rate:
1.
raise the bow to the highest position.
2.
set the downfeed rate Knob in figure 31 to
the desired feed rate.
downfeed rate
Knob
figure 31. Feed rate controls.
3.
turn the downfeed start/stop knob to the left
to lower the bow at the feed rate you have
set. turning the knob to the right locks the
bow in position.
downfeed start/
stop Knob
-29-
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