Operation; Straight Cutting; Maintenance - Makita DMC300 Instruction Manual

3. Dismount the rear half of the wheel guard from
the dust collection cover, while lowering the tool handle
from a raised position to a down position.
► Fig.24: 1. Wheel guard 2. Dust collection cover
4. Pull the front half of the wheel guard, at a slight
upward and outward angle, apart from the dust collec-
tion cover.
► Fig.25: 1. Wheel guard 2. Dust collection cover

OPERATION

CAUTION:
Always maintain a firm grip on the
tool during operation.
CAUTION:
Do not force the tool. Forcing and
exerting excessive pressure or allowing the wheel to
bend, pinch or twist in the cut can cause overheating
of the motor and dangerous kickback of the tool.
CAUTION:
When cutting plastics, be sure not
to overheat the cutting wheel. It may result in melt-
ing the workpiece.
CAUTION:
Do not bang or bump a cutting
wheel when starting or during operation.
CAUTION:
Always wear safety goggles or a
face shield during operation.
CAUTION:
After operation, always switch off
the tool and wait until the wheel has come to a
complete stop before putting the tool down.
Down cutting
NOTICE:
Exercise due care about using an effec-
tive cutting surface of the wheel so as to avoid
exposure towards cut-off particles.
NOTICE:
Keep a cutting wheel stand straight in
workpiece and avoid tilting or swinging the tool
during operation.
Position the wheel guard correctly to provide maximum
protection from sparks and loose particles thrown from
the cutting wheel. Place the tool over workpiece without
the cutting wheel making any contact. Turn the tool on
and wait until the cutting wheel attains full speed. Then
slowly lower the tool over the workpiece surface, using
a moderate feed suited to your applications.
Forward rotation
► Fig.26
Reverse rotation
► Fig.27

Straight cutting

CAUTION:
Be sure that a cutting wheel
always works in an up-grinding motion. It other-
wise may cause the tool to be pushed uncontrolled
out of the cut.
NOTICE:
Keep your cutting line straight and
apply steady pressure to obtain a uniform cut
through workpiece.
Set the base plate of dust collection cover on workpiece
to be cut without the cutting wheel making any contact.
Turn the tool on and wait until the cutting wheel attains
full speed. Then slowly move the tool over the work-
piece surface, keeping it flat and advancing smoothly
until the cutting is completed.
Select the reverse rotation for push cutting, and the
forward rotation for pull cutting.
Push cutting in reverse rotation
► Fig.28
Pull cutting in forward rotation
► Fig.29
NOTE: Be aware that the dust collection cover tends
to function less effectively in pull cutting as some
cutting particles spread inside the cover against the
dust extraction flow.

MAINTENANCE

CAUTION:
Always be sure that the tool is
switched off and the battery cartridge is removed
before attempting to perform inspection or
maintenance.
NOTICE:
Never use gasoline, benzine, thinner,
alcohol or the like. Discoloration, deformation or
cracks may result.
To maintain product SAFETY and RELIABILITY,
repairs, any other maintenance or adjustment should
be performed by Makita Authorized or Factory Service
Centers, always using Makita replacement parts.
Dressing diamond wheel
If the cutting action of the diamond wheel begins to
diminish, use an old discarded coarse grit bench grinder
wheel or concrete block to dress the diamond wheel. To
do this, tightly secure the bench grinder wheel or con-
crete block and cut in it.
After use
Clean the dust inside the tool by running the tool at an
idle for a while. Accumulation of dust in the motor may
cause a malfunction of the tool.
15 ENGLISH