20
11.4
Evaluating cutting efficiency
Is the blade cutting efficiently? The best way to
determine this is to observe the chips formed by
the cutting blade.
If chip formation is powdery, then the feed rate is
much too light, or the blade is dull.
If chips formed are curled, but colored — that is,
either blue or straw-colored from heat generated
during the cut — then the feed rate is too high.
If chips are slightly curled and are not colored by
heat – the blade is sufficiently sharp and is
cutting at its most efficient rate.
12.0
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.
Keep all surfaces clean and free of rust, slag,
chips, and coolant build-up.
Clear metal particles with a small paint brush or
parts cleaning brush.
Clean filter screen.
Do not use compressed air, as it may force
chips into the guide bearings and other critical
areas of the saw.
Wipe saw down with a clean, dry cloth, and oil
all unpainted surfaces with light machine oil.
Keep blade guides clean and free of metal
particles.
Check guide bearings frequently to make sure
that they are properly adjusted and turning
freely.
If the power cord is worn, cut, or damaged in
any way, have it replaced immediately.
Ball bearings on blade guide assemblies and
blade wheels are permanently lubricated and
sealed. They require no further lubrication.
Grease the vise lead screw (Figure 30) as
needed, with a general purpose grease.
Place a thin coat of oil on the table surface on
which the vise jaw slides.
Figure 30
12.1
Coolant level
Maintain coolant level. Low coolant level can
cause foaming and high blade temperatures.
Replace dirty coolant; dirty or weak coolant can
clog the pump, cause crooked cuts, a low cutting
rate and/or permanent blade damage. To fill the
tank, remove the filter cup and pour coolant into
the hole to about 80% of full capacity. Full
capacity is 9 liters (2.5 gal). Follow coolant
manufacturer’s instructions for proper use and
disposal.
12.2
Gear box
To change gear box oil:
1. Disconnect machine from power source.
2. Place bow in vertical position.
3. Remove drain plug (A, Figure 31) and drain
oil. (Follow local regulations for disposal of
used oil.)
Figure 31
4. Reinstall drain plug and return bow to
horizontal position.
5. Remove vent plug (B), and fill gear box
through the hole with approximately 0.3L
(10.14 oz.) of 90W oil.
6. Reinstall vent plug (B).
