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Chapter 2 Drive System Configuration
2–8
2-3-2 Configuration of parallel drive system
The system configuration when driving one axis with two motors and two servo drive units is as shown
below. In this case, the position command sent to each servo drive unit must be the same position
command using the CNC synchronous control function.
(1) 2-scale 2-motor (2-amplifier) control
MDS-B-V14L
CN4
CN1B CN1B
CN4
CN3
CN3
Linear scale
L+
L–
Single-phase
200VAC
UVW
CON3
CON4
CON1
CON2
Analog voltage output type
incremental scale or
AT342 (Mitsutoyo)
absolute position scale
Linear scale
Pole detector
(MDS-B-MD-600)
* Not required for the AT342
scale
EmptyCON3
CON4
CON1
CON2
CN2
CN1A
CN2
UVW
Master axis
MDS-B-V14L
Slave axis
Scale I/F
(Incremental scale : MDS-B-HR-11M)
(AT342 scale : MDS-B-HR-21M)
To next axis,
terminator or
battery unit
To power supply
if final axis
To NC or
previous axis
Linear motor
primary side
(Slave)
Motor thermal
signal
Linear motor
primary side (Master)
Scale I/F
(Incremental scale : MDS-B-HR-12M)
(AT342 scale : MDS-B-HR-22M)
Pole detector
(MDS-B-MD-600)
* Not required for the AT342
scale
Motor thermal signal
Incremental system
Unit name Type Qty.
Linear servomotor LM-NP- 2
Servo driver MDS-B-V14L- 2
Linear scale LS186, LIDA181 etc. 2
MDS-B-HR-12M
1
Scale I/F unit
MDS-B-HR-11M
1
Pole detection unit MDS-B-MD-600 2
Absolute system
Unit name Type Qty.
Linear servomotor LM-NP- 2
Servo driver MDS-B-V14L- 2
Linear scale AT342 (Special) 2
Scale I/F unit MDS-B-HR-22M
MDS-B-HR-22 can
be used when
detecting the motor
thermal signal with
the NC.
1
MDS-B-HR-21M
MDS-B-HR-21 can
be used when
detecting the motor
thermal signal with
the NC.
1
Pole detection unit None 0