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2 Wiring and Connection
MITSUBISHI CNC
(b) (star) - (star) changeover circuit
Coil changeover circuit
<Wiring of motor coil>
(c) Coil changeover control circuit (common)
Coil changeover relay control circuit
-connection (MC1:ON MC2:OFF) -connection (MC1:ON MC2:OFF)
POINT
Wire it according to each 6 terminal’s sign (U1, V1, W1, U2, V2, W2) of spindle motor for the coil changeover.
U1
V1
W1
U2
V2
W2
U
V
W
MC1
MC2
Spindle motor
Spindle
drive unit
MC1: Contactor to connect low-speed coil (1st -connection)
MC2: Contactor to connect high-speed coil (2nd -connection)
terminal
U2
U1
V1
W1
V2
W2
W
U
V
Spindle
drive unit
:The terminal which is assembled
at the contactor ON
U2
U1
V1
W1
V2
W2
W
U
V
:The terminal which is assembled
at the contactor ON
Spindle
drive unit
RA
MC1 SK
MC2
RA
S
T
MC2 SK
MC1
RA
CN9-8
CN9-10
MDS-D2/DH2 Series
(break contact)
(break contact)
(make contact)
(break contact)