Manual Makita 3901 (page 8 of 18) (English, German, Dutch, Danish, French, Italian, Norwegian)

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OPERATING INSTRUCTIONS

Dust bag (Fig. 1)

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.

Note: If you connect a Makita vacuum cleaner to your plate joiner, more efficient and cleaner operations can be per-

formed.

Adjusting the depth of cut (Fig. 2)

6 cutting depths can be preset. Rotate the stopper until the pointer points to the appropriate size marked on the stop-

per. Refer to the table below for the correspondence between the sizes marked on the stopper and the biscuit size.

Fine adjustments to the cutting depth can be made by turning the adjusting screw after loosening the hex nut.

Angle guide (Fig. 3 & 4)

The angle guide can be moved up and down to adjust the

position of the blade in relation to the top of the work-

piece. To adjust the angle guide height, loosen the lock

lever and rotate the knob until the pointer points to the

desired scale graduation marked on the angle guide.

Then tighten the lock lever to secure the angle guide. The

scale on the angle guide indicates the distance from the

top of the workpiece to the center of the blade thickness.

Fence (Fig. 5 & 6)

The angle of the fence can be adjusted between 0° and

90° (positive stops at 0°, 45° and 90°). To adjust the

angle, loosen the lock lever and tilt the fence until the

pointer points to the desired graduation on the angle

scale. Then tighten the lock lever to secure the fence.

When the fence is set at 90°, both the distance from the

center of the blade thickness to the fence and the dis-

tance from the center of the blade thickness to the bot-

tom of the base are 10 mm.

Set plate (Fig. 7 & 8)

Use the set plate as shown in Fig. 7 & 8 when cutting

slots in thin workpieces.

Switching ON and OFF (Fig. 9)

CAUTION:

Before plugging in the tool, always check to see that the

switch actuates properly and returns to the “OFF” posi-

tion when the “OFF” side of the switch lever is depressed.

To switch on, slide the switch lever toward the “ON” posi-

tion.

To switch off, depress the “OFF” side of the switch lever.

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. 10),

T-Butt Joint (Fig. 11), Miter Joint (Fig. 12), Frame

Joint (Fig. 13) and Edge-To-Edge Joint (Fig. 14).

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. 15)

Clamp the vertical workpiece to the workbench.

For Miter Joint, Frame Joint and Edge-To-Edge

Joint only (Fig. 15)

Clamp one workpiece to the workbench.

4. Set the depth of cut according to the size of biscuit

to be used.

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. 16)

7. Switch on the tool and gently push it forward to

extend the blade into the workpiece. (Fig. 16)

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. 15)

Clamp the horizontal workpiece to the workbench.

For Miter Joint, Frame Joint and Edge-To-Edge

Joint only (Fig. 15)

Clamp the other workpiece to the workbench.

10. For Corner Joint only (Fig. 17)

Place the tool on the workpiece so that the blade is

facing down.

For T-Butt Joint only (Fig. 18)

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. 19)

1) 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.

2) Follow steps 1 – 11 excluding steps 5 and 10

described above.

For T-Butt Joint only (Fig. 20 & 21)

1) Fit the two workpieces together as they will appear

in the finished joint position.

2) Lay the vertical workpiece on the horizontal one.

Clamp both workpieces to the workbench.

3) Remove the angle guide from the tool.

4) Follow the steps 2, 4, 6, 7, 8 and 11 described

above.

Size on stopper 0 10 20 S D MAX

Biscuit size 0 1020———

Depth of cut 8mm 10mm 12.3mm 13mm 14.7mm 20mm

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Makita 3901 Manual

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