Functional Description - Makita SG1250 Manuel D'instructions

i) Support panels or any oversized workpiece
to minimize the risk of wheel pinching and
kickback. Large workpieces tend to sag under
their own weight. Supports must be placed under
the workpiece near the line of cut and near the
edge of the workpiece on both sides of the
wheel.
j) Use extra caution when making a "pocket
cut" into existing walls or other blind areas.
The protruding wheel may cut gas or water
pipes, electrical wiring or objects that can cause
kickback.
19. Before using a segmented diamond wheel, make
sure that the diamond wheel has the peripheral
gap between segments of 10 mm or less, only
with a negative rake angle.
Additional Safety Warnings:
20. Never attempt to cut with the tool held upside
down in a vise. This can lead to serious acci-
dents, because it is extremely dangerous.
21. Some material contains chemicals which may be
toxic. Take caution to prevent dust inhalation
and skin contact. Follow material supplier safety
data.
SAVE THESE INSTRUCTIONS.
WARNING:
DO NOT let comfort or familiarity with product
(gained from repeated use) replace strict adherence
to safety rules for the subject product. MISUSE or
failure to follow the safety rules stated in this instruc-
tion manual may cause serious personal injury.

FUNCTIONAL DESCRIPTION

CAUTION:
• Always be sure that the tool is switched off and
unplugged before adjusting or checking function on the
tool.
Shaft lock (Fig. 1)
CAUTION:
• Never actuate the shaft lock when the spindle is mov-
ing. The tool may be damaged.
Press the shaft lock to prevent spindle rotation when
installing or removing accessories.
Sighting (Fig. 2)
There are notches on the front and rear of the base. This
is helpful for an operator to follow a straight cutting line.
Adjusting the grooving or cutting depth (Fig. 3)
The depth of grooving or cutting can be adjusted in the
range of 0 through 30 mm.
Loosen and move the clamping screw so that the pointer
points to your desired depth graduation on the scale.
Then tighten the clamping screw firmly.
Switch action (Fig. 4)
CAUTION:
• Before plugging in the tool, always check to see that
the slide switch actuates properly and returns to the
"OFF" position when the rear of the slide switch is
depressed.
To start the tool, slide the slide switch toward the "I (ON)"
position. For continuous operation, press the front of the
slide switch to lock it.
To stop the tool, press the rear of the slide switch, then
slide it toward the "O (OFF)" position.
Electronic function
The tools equipped with electronic function are easy to
operate because of the following features.
Constant speed control
Electronic speed control for obtaining constant speed.
Possible to get fine finish, because the rotating speed is
kept constant even under load condition.
Soft start
Soft-start feature minimizes start-up shock, and makes
the tool start smoothly.
Overload protector
When the tool would be employed over the admissible
load, it will stop automatically to protect the motor and
wheel. When the load will come to the admissible level
again, the tool can be started automatically.
ASSEMBLY
CAUTION:
• Always be sure that the tool is switched off and
unplugged before carrying out any work on the tool.
Installing or removing the diamond wheel
Removal (Fig. 5, 6 & 7)
Loosen and remove the bolt with the hex wrench.
Open the cover while holding the tool base with a hand
as shown in the figure.
NOTE:
• The tool base will open at a stroke by the spring force.
Rotate the diamond wheel while pressing the shaft lock
until it engages.
Remove the lock nut by rotating it counterclockwise with
the lock nut wrench.
Remove the diamond wheel and space rings.
Adjusting the groove width (the distance between
the two diamond wheels)
The width of grooving in the workpiece can be adjusted
by changing the number of the space rings as shown in
the table. (Fig. 8)
INSTALLATION (Fig. 9)
Determine the distance of the two blades according to
the table.
To install the diamond wheel, mount it carefully onto the
spindle, making sure that the direction of the arrow on
the surface of the diamond wheel matches the direction
of the arrow on the tool. Install space ring and lock nut.
Tighten the lock nut securely clockwise with the lock nut
wrench while pushing down the shaft lock.
Return the cover and the base to the original position and
tighten the bolt to secure them.
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