Itm BM21 User manual

www.itmtools.com.au
Ver: 1.0
BM21
SERVICE MANUAL
BM21
BEVELLING MACHINE

2www.itmtools.com.au
BM21 SERVICE MANUAL
Replacement of the motor
1. Dismount the guide, milling head cover, and milling head according to
„Replacement of the milling head”.
2. Dismount the controller according to „Replacement of the controller”.
3. Unscrew 2 screws mounting the frame with the seal to the motor.
4. Unscrew 4 screws mounting the motor to the frame, remove the motor
from the frame, and unscrew 4 dampers.
5. Replace the motor, proceeding in reverse order. Pay close attention to
the following:
-damper – prohibited is stretching the damper by tightening the
mounting screw. Use spacer washers as in the figure below if needed,
Damper
Frame
Mounting
screw
Frame with
the seal
Mounting
screw
Mounting
screw

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BM21 SERVICE MANUAL
BM-21 service manual page 2/8
-presence of the rubber seal between the motor and the frame,
- presence of the microrubber between the frame and the lower cover of the
controller.
NOTE! Place the wires in such a way not to crush them.
Damper
Frame
8.4 mm spacer
washer
Mounting
screw
Motor
Rubber
motor seal
Microrubber
seal
Lower cover
of the
controller

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BM21 SERVICE MANUAL
BM-21 service manual page 3/8
Replacement of the milling head
1. Loosen the knob of the milling head cover, unscrew the lever, and slide
out the milling depth indicator completely. Remove the cover along with
the guide.
2. Place a 32 mm flat wrench onto the driving ring and lock the wrench,
then use a 8 mm hex wrench according to the direction of the arrow to
loosen the bolt. Remove the milling head from the motor shaft.
3. Replace the milling head. Mount again by proceeding in reverse order.
Knob
Lever
Milling head cover
Depth indicator
Milling
head
8 mm hex
wrench
32 mm flat
wrench

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BM21 SERVICE MANUAL
BM-21 service manual page 4/8
Replacement of the controller
1. Unscrew 4 screws connecting the controller cover to the frame. Remove
the controller cover.
2. Unplug the wires of the controller and capacitor. Unscrew the screw of the
mounting block, separate the block, and unplug the protective earth wire.
3. Replace the controller by proceeding in reverse order. Maintain the wire
colors as shown in the figure. NOTE! Place the wires in such a way not to
crush them.
Screw mounting the
controller cover to the
frame
Controller and
capacitor wire
Protective
earth wire
Controller
wires
Capacitor wire
Mounting block
Screw of the
mounting block

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BM21 SERVICE MANUAL
BM-21 service manual page 5/8
Replacement of the power cord
1. Unscrew 4 mounting screws and pry off the controller assembly.
2. Unscrew the cable grommet of the power cord, and unscrew the lock nut
of the cable gland. Unplug the wires of the power cord from the power
switch, and unscrew the protective earth wire from the controller body.
3. Replace the power cord and connect the wires. Screw the controller to the
frame. NOTE! Place the wires inside the controller in such a way not to
crush them.
Cable grommet
Power cable wires
Protective earth
wire of the power
cord
Mounting
screws
Lock nut of the cable
gland

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BM21 SERVICE MANUAL
BM-21 service manual page 6/8
Replacement of the power switch
1. Unplug the wires from the power switch.
2. Squeeze the latches and push the switch out of the controller body.
3. Replace the switch by proceeding in reverse order. Maintain the wire
colors as shown in the figure.
Wires
Latches
Controller
body
Power
switch
Latches

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BM21 SERVICE MANUAL
BM-21 service manual page 7/8
Replacement of the START-STOP switch
1. Disconnect the wires from the START-STOP switch.
2. Rotate the latch of the START-STOP switch to OFF and remove the switch.
3. Unscrew the nut of the switch drive. Use a special key KLC-000046.
4. Replace the START-STOP switch drive by proceeding in reverse order.
Latch
Controller body
START-STOP
switch
Special key

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BM21 SERVICE MANUAL
BM-21 service manual page 8/8
Replacement of the guide assembly
1. Unscrew the screws mounting the guide assembly to the milling head
cover. Remove the guide assembly.
2. Replace the guide assembly in reverse order.
Mounting screws
Guide assembly