Makita 3901 Manual De Instrucciones página 9

OPERATION
How to make joints
To make joints, proceed as follows:
1. Fit the two workpieces together as they will appear
in the finished joint position.
Corner Joint (Fig. 11)
T-Butt Joint (Fig. 12)
Miter Joint (Fig. 13)
Frame Joint (Fig. 14)
Edge-To-Edge Joint (Fig. 15)
2. Mark the center of the intended biscuit slots on the
workpiece using a pencil.
NOTE:
• The center of slots should be at least 50 mm from the
outer edge of the workpieces.
• Allow 100 mm – 150 mm between slots in multiple bis-
cuit application.
3. For Corner Joint and T-Butt Joint only (Fig. 16)
Clamp the vertical workpiece to the workbench.
For Miter Joint only (Fig. 17)
Clamp one workpiece to the workbench with the
mitered edge facing up.
For Frame Joint and Edge-To-Edge Joint only
(Fig. 18, 19 & 20)
Clamp one workpiece to the workbench.
4. Set the depth of cut according to the size of biscuit
to be used. Refer to the table in the "Adjusting the
depth of cut" section.
5. Adjust the angle guide height so that the blade is
centered in the board thickness.
6. Align the center mark on the base with the pencil
line on the workpiece.
7. Switch on the tool and gently push it forward to
extend the blade into the workpiece.
8. Gently return the tool to the original position after the
adjusting screw reaches the stopper.
9. For Corner Joint
(Fig. 21 & 22)
Clamp the horizontal workpiece to the workbench.
For Miter Joint only (Fig. 23)
Clamp the other workpiece to the workbench with
the mitered edge facing up.
For Frame Joint and Edge-To-Edge Joint only
(Fig. 24 & 25)
Clamp the other workpiece to the workbench.
10. For Corner Joint only (Fig. 26)
Place the tool on the workpiece so that the blade is
facing down.
For T-Butt Joint only (Fig. 27)
Remove the angle guide from the tool. Place the tool
on the workpiece so that the blade is facing down.
11. Repeat the steps 6 – 8 to cut the slots in the hori-
zontal or the other workpiece.
If you do not need to center the blade in the board thick-
ness, proceed as follows:
For Corner Joints, Miter Joint, Frame Joint and Edge-
To-Edge Joint only (Fig. 28)
• Remove the angle guide from the tool. Set the fence at
90° for Corner Joint, Frame Joint and Edge-To-Edge
Joint or at 45° for Miter Joint.
• Follow steps 1 – 11 excluding steps 5 and 10 described
above.
All manuals and user guides at all-guides.com
and T-Butt Joint only
For T-Butt Joint only (Fig. 29 & 30)
• Fit the two workpieces together as they will appear in
the finished joint position.
• Lay the vertical workpiece on the horizontal one. Clamp
both workpieces to the workbench.
• Remove the angle guide from the tool.
• Follow the steps 2, 4, 6, 7, 8 and 11 described above.
How to trim wall or ceiling panels
First unplug the tool. Open the blade cover and replace
the existing cutter blade with an optional circular saw
blade 110 mm in diameter.
Refer to the "Removing or installing the blade" section
which was described previously. Remove the rubber fac-
ing from the base. Then close and secure the blade
cover. Now the max. depth of cut is 25 mm.
CAUTION:
• Be very careful that the blade has been properly
mounted on the tool spindle between the inner flange
and the lock nut. Be sure to securely tighten the lock
nut.
Set the depth of cut to "MAX". Rest the base on the floor
(when trimming the wall panels) or the wall (when trim-
ming the ceiling panels). Using the floor or wall as a
guide, trim wall or ceiling panels. Feed in the direction of
the arrow.
Fig. 33: When trimming the wall panels.
Fig. 34: When trimming the ceiling panels.
CAUTION:
• Before trimming the panels, check the wall or ceiling
carefully to avoid cutting the electrical wires, nails or
other foreign materials.
• Always reinstall the rubber facing after trimming the
panels. If cutting slots for biscuits without the rubber
facing installed properly on the tool, the tool might slip
unexpectedly on the workpiece, causing dangerous
loss of control of the tool. When installing the rubber
facing, always hook it onto the inside of the front open-
ing.
MAINTENANCE
CAUTION:
• Always be sure that the tool is switched off and
unplugged before attempting to perform inspection or
maintenance.
Replacing carbon brushes (Fig. 35 & 36)
Remove and check the carbon brushes regularly.
Replace when they wear down to the limit mark. Keep
the carbon brushes clean and free to slip in the holders.
Both carbon brushes should be replaced at the same
time. Use only identical carbon brushes.
Use a screwdriver to remove the brush holder caps. Take
out the worn carbon brushes, insert the new ones and
secure the brush holder caps.
To maintain product SAFETY and RELIABILITY, repairs,
any other maintenance or adjustment should be per-
formed by Makita Authorized or Factory Service Centers,
always using Makita replacement parts.
(Fig. 31 & 32)
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