Operation - Makita 3901 Instruction Manual

Switch action
Fig.8
CAUTION:
Before plugging in the tool, always check to see
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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.
ASSEMBLY
CAUTION:
Always be sure that the tool is switched off and
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unplugged before carrying out any work on the tool.
Removing or installing the blade
Fig.9
CAUTION:
When installing the cutter blade, mount the inner
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flange with the side marked "22" facing toward you.
When installing the circular saw blade, mount the
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inner flange with the side marked "22" facing
toward the tool.
To remove the blade, loosen the clamp screw and open
the blade cover. Push the shaft lock and loosen the lock
nut using the lock nut wrench. To install the blade, first
mount the inner flange.
Then mount the blade and the lock nut. Securely tighten
the lock nut using the lock nut wrench. Close the blade
cover and tighten the clamp screw to secure the blade
cover.
CAUTION:
Use only Makita lock nut wrench provided to
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remove or install the blade.
Always check the depth of cut after replacing the
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blade. Reajust it if necessary.
Dust bag
Fig.10
To attach the dust bag, fit it onto the dust nozzle. If the
dust bag becomes an obstacle to your work, turn the dust
nozzle to change the dust bag position.
When the dust bag is about half full, switch off and
unplug the tool. Remove the dust bag from the tool and
pull the bag's fastener out. Empty the dust bag by tapping
it lightly to remove as much of the dust as possible.
NOTE:
If you connect a Makita vacuum cleaner to your
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plate joiner, more efficient and cleaner operations
can be performed.

OPERATION

How to make joints
Fig.11
Fig.12
Fig.13
Fig.14
Fig.15
To make joints, proceed as follows:
1. Fit the two workpieces together as they will appear
in the finished joint position.
Corner Joint (Fig. A)
T-Butt Joint (Fig. B)
Miter Joint (Fig. C)
Frame Joint (Fig. D)
Edge-To-Edge Joint (Fig. E)
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
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from the outer edge of the workpieces.
Allow 100 mm - 150 mm between slots in
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multiple biscuit 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
Fig.19
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.
Fig.20
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 and T-Butt Joint only
Fig.21
Fig.22
Clamp the horizontal workpiece to the workbench.
For Miter Joint only
8