Using Encoder Output - YASKAWA SGM-A3 User Manual

APPLICATIONS OF Σ-SERIES PRODUCTS

3.2.3 Using Encoder Output

3.2.3 Using Encoder Output

3
TERMS
76
1) Encoder output signals divided inside the Servopack can be output externally. These
signals can be used to form a position control loop in the host controller.
Servomotor
encoder
Phase A
Phase B
Phase C
The output circuit is for line driver output. Connect each signal line according to the fol-
lowing circuit diagram.
Servopack
(1CN-33)
Phase A
(1CN-34)
(1CN-35)
Phase B
(1CN-36)
(1CN-19)
Phase C
(1CN-20)
(1CN-1)
(1CN-50)
↕P: Represents twisted-pair cables
Divided (or dividing)
"Dividing" means converting an input pulse train from the encoder mounted on the motor
according to the preset pulse density and outputting the converted pulse. The unit is pulses
per revolution.
This output is
explained here.
Host
Servopack
controller
Frequency
dividing
circuit
SG
FG
Line receiver used: SN75175 manufactured by
R (termination resistor):
C (decoupling capacitor):
Host controller
Line receiver
Phase A
Phase B
Phase C
4
12
D
Choke
coil
Smoothing
capacitor
Texas Instruments Inc. or
MC3486 (or equivalent)
220 to 470 Ω
0.1 μF