10-5
October 2000 © TOSHIBA TEC
MR-3011/3012 DESCRIPTION OF CIRCUITS
10.5 Drive Circuit for Feed Motor
This circuit controls the rotation/stoppage and the direction of the rotation of the feed motor.
The feed motor has an encoder sensor to feed back signals controlling the number and stoppage of rotations to
the CPU. Control signals from the CPU controls the direction and stoppage of the motor rotation. These control
signals (PREM_A, PREM_B, PREM_C and PREM_D) are changed as shown in the table below.
PREM_PWM is a signal output for speed control, and outputs pulse width modulation waves by comparing the
reference clock in the CPU with the output from the clock sensor of the feed motor.
KMOT1
CN11.1
KMOT2
CN11.2
2
1
FMOT
Feed motor
IC8.1
1
+
2
-
3
2
1
C109
PREM_B
TP47
1
1
2
R129
PGND
B
IC6.1
1
2
A
3
Y
2
1
L2
L1
1
2
1
2
R95
R122
2
1
Q21
3
S
D 2
1
G
S 3
D 2
G
1
A 2
K 1
D2
D1
A 2
K 1
Q22
Q20
Q19
S 3
1
G
2
D
2
D
3
G
1
S
R118
2
1
C108
2
1
2
R80
1
4
C1
B
3
1
R123
2
8
IC6.3 Y
9
B
10 A
Y
IC6.4
11
12
B
13 A
RCL
13
12
Y
1
2
R42
R113
2
1
SGND
+5V
C2 5
E
2
Q23
1
B2
6
B
IC6.2
5
Y
A
4
PREM_A
PREM_C
PREM_D
PREM_LMT
PREM_PWM
TP48
1
TP46
1
TP48
1
TP54
1
IC1.6
???
2
1
DF+24V
SW1
PREM_A
Low
Low
High
High
PREM_B
Low
High
Low
High
PREM_C
Low
High
Low
Low
PREM_D
Low
Low
High
Low
State of Motor
OFF
Forward
rotation
Reverse
rotation
Braked
Q19
OFF
OFF
ON
ON
Q20
OFF
ON
OFF
ON
Q21
OFF
ON
OFF
OFF
Q22
OFF
OFF
ON
OFF
#Chapter_10.p65
10/3/00, 5:09 PM
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