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Chapter 2 Drive System Configuration
2–7
(3) Absolute system 2 (System using linear scale AT342)
The linear scale and servo drive unit can be connected directly and used without the scale I/F unit
(MDS-B-HR) or pole detection unit (MDS-B-MD). Note that the position and speed resolution will be
limited to 0.5µm, so to further improve the controllability, use of the system shown in (4) is
recommended.
CAUTION
In a system that does not use the MDS-B-HR unit (scale I/F unit), use the
motor thermal signal for the CNC unit's general-purpose input port, and detect
the motor overheating.
MDS-B-V14L
Servo driver
CN1A
CN2
CN4
CN3
CN1B
L+
L–
Single-phase
200VAC
UVW
To next axis,
terminator or
battery unit
To power supply if
final axis
To NC or
previous axis
Linear motor
primary side
Linear motor
secondary side
permanent
magnet
Motor thermal
signal
To NC general-
purpose input port
AT342 (Mitsutoyo)
Absolute position
linear scale
(4) Absolute system 3 (System using linear scale AT342 special + MDS-B-HR-21)
By using the scale I/F unit (MDS-B-HR), the resolution of the position and speed used for servo
control can be improved, thereby improving the servo's controllability.
MDS-B-V14L
Servo driver
Empty
CON3
CON4
Empty
CON1
CON2
CN1A
CN2
CN4
CN3
CN1B
Scale I/F
(MDS-B-HR-21M)
L+
L–
Single-phase
200VAC
UVW
To next axis,
terminator or
battery unit
To power supply
if final axis
To NC or
previous axis
Linear motor
primary side
Linear motor
secondary side
permanent
magnet
Motor thermal
signal
AT342 special (Mitsutoyo)
Absolute position linear scale
Unit name Type Qty.
Linear servomotor LM-NP- 1
Servo driver MDS-B-V14L- 1
Linear scale AT342 1
Scale I/F unit None 0
Pole detection unit None 0
Unit name Type Qty.
Linear servomotor LM-NP- 1
Servo driver MDS-B-V14L- 1
Linear scale AT342 (Special) 1
Scale I/F unit
MDS-B-HR-21M
MDS-B-HR-21 can
be used when
detecting the motor
thermal signal with
the CNC.
0
Pole detection unit None 0