Palmgren 9683314 Operating Manual & Parts List page 9

Palmgren Operating Manual & Parts List
OPERATION (CONTINUED)
FEED PRESSURE
• Correct feed pressure holds the blade in the cut. Feed pressure is
supplied by the weight of the head. Maximum material removal
rate corresponds with the proper pressure.
• Optimum feed pressure ensures that maximum power is used for
cutting. If the feed pressure is too low, the blade will not dig into
the material properly. Too much feed pressure will cause the
blade to dig too deeply, bogging down the motor, and possibly
burning it out. In addition, blade "shocking" could result.
• Extra energy will be used to produce powdered chips rather than
smooth shavings; this will produce more heat and dull the blade.
CAUTION:
Do not attempt to increase feed pressure by leaning on
head.
REGULATING FEED PRESSURE
Refer to Figures 8 and 13.
• Feed pressure is controlled by the feed regulator. The regulator
creates a force which counteracts the feed pressure. The force
from the feed regulator can be adjusted to create any feed
pressure up to the set maximum.
• Having the correct feed pressure will produce the optimum feed
rate and the fastest cut. Incorrect pressure, whether too great or
too small, will put less power into the cut and reduce the feed
rate.
NOTE: Wasted power damages the saw.
• Determining the proper feed is largely a judgement based on
experience. The feed is usually determined during the cutting
operation. Before the cutting begins, the blade should be off the
work and the head should be held in position by placing the feed
control knob (See Figure 8) in the OFF position
• Once the blade is running, the head is slowly lowered onto the
work by turning the feed control knob to the on position, and
adjusting the feed regulator knob to the desired feed rate.
• After the blade begins the cut, optimum feed rate should be
determined.
• To determine if the feed is incorrect, examine the chips
produced. When the blade is operating at the ideal feed for the
speed, the chips will be curled and continuous. If the chips are
thick and not continuous, the feed pressure should be reduced. If
the chips are powdery, the feed pressure needs to be increased
(Refer to Figure 13).
Curled shavings indicate
correct feed pressure.
Thick discontinuous chips
indicate too much pressure.
Turn knob clockwise.
Powdery chips indicate too
little pressure. Turn knob
counterclockwise.
Figure 13 – Determine Feed Pressure
CUTTING FLUIDS
• Using a cutting fluid can improve the cutting conditions and
keep them more consistent throughout the cut by:
a. Lubricating the blade, which reduces the friction between it
and the workpiece.
b. Taking heat away from the cut and preventing the workpiece
and blade from overheating.
c. Dissipating the built-up heat because hot metals become
tough and more difficult to cut and blades become dull at an
accelerated rate.
NOTE: Because much of the built-up heat comes from friction
between the blade and the workpiece, cutting fluids are often
referred to as "coolants" .
• The importance of cutting fluids increases with blade speed and
toughness of the material.
• There are many available types of cutting fluids. Consult a
machinist's handbook for specific information. The most
common general purpose coolant is a mixture of water and
water soluble oil (Model No. 6Y647). The producer of the water
soluble oil should provide the appropriate mixing ratios.
COOLANT TANK
Refer to Figure 16.
• The coolant reservoir (Ref. No. 14) can hold up to four and a half
gallons of coolant. For proper operation, the pump must be
completely submerged in fluid.
• Check that the fluid level is sufficient before attempting wet-cut
operations. Usually four gallons is sufficient.
• Check that the tank is not filled with debris.
CAUTION:
Do not allow shavings to flow through the pump.
Change the fluid and clean the tank often. Whenever possible, the
chips should be cleaned out of the chip tray (Ref. No. 1) before they
are washed into coolant reservoir.
POSITIONING
Refer to Figure 14, page 10.
The vise is designed to keep the workpiece steady while it is being
cut. The vise should only have to counteract the cutting forces. Using
the proper position will help produce a safe and accurate cut. These
general rules about positioning apply to most situations:
• The workpiece should rest flat on the workbed without the need
for side support. Some suggested configurations are shown in
Figure 14.
• The entire length of the work should be supported. Do not
balance the workpiece on the workbed. Use support stands to
prevent the work from falling off after the cut.
• Avoid positions which will cause the blade to encounter sharp
edges. If sharp corners cannot be avoided, file down the point
that the blade will contact.
WORK STOP ADJUSTMENT
Refer to Figure 14, page 10.
• Loosen the knob holding the work stop casting to the work stop
bar.
• Adjust the work stop casting to the desired length position.
• Rotate the work stop to contact the workpiece as close to the
bottom as possible.
• Tighten the knob.
• Do not allow the blade to rest on the workpiece while the motor
is shut off.
• Flats and rectangles have thickness averages of w (See Figure 14).
9
9683314