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Mitsubishi Electric CNC Specifications And Instruction Manual page 73

Direct drive motor
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Direct Drive Motor Specifications and Instruction Manual
6 Assembly and Installation
(1) Installing a magnetic drum
Install a flange on the shaft side and fix with screw in the axial direction by using the magnetic drum installation
hole. Center the core with centering track so that the amplitude to the shaft rotation center is 15μm or less to install
the magnetic drum.
Magnetic drum
installation hole
Magnetic drum
CAUTION
1. To avoid the interference with the sensor head, design the flange outer diameter φC so that it is equal to the magnetic
drum outer diameter or less.
2. Fix the magnetic drum with screw on the shaft. (Do not fix with shrink fitting.)
3. Center the core with centering track. Do not perform by striking on the magnetizing part as it may result in damages.
4. Adherence of magnetic materials to the magnetizing part could lead to incorrect detections. Perform an air blow when
the core alignment is completed.
Type
MBA405W-BE082
MBA405W-BF125
MBA405W-BG160
IB-1501068-C
C
B
Shaft
Flange
Magnetizing part
Centering track part
(magnet)
Centering track
Magnetic drum installation hole
outer diameter
[mm]
8-φ3.4 through (evenly spaced
φ98
around φ90 circumference)
8-φ4.5 through (evenly spaced
φ148.3
around φ134 circumference)
8-φ4.5 through (evenly spaced
φ198.6
around φ170 circumference)
Design the flange's outer diameter
the clearance (0.1 mm) from the magnetic
drum's inner diameter that allows the run-out
A
of the shaft rotation center to be 15mm or less.
*If the gap is large, adjustment may take time
and if it is too small, the run-out cannot be
adjusted.
0.01
A
0.015
A
Iron-based screw
Installation
position [mm]
48
[Unit:mm]
B to have
Recommended
screw torque
screw
[N•m]
M3
0.61 to 0.83
M4
1.39 to 1.89
M5
2.75 to 3.63

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