Yaskawa Large Capacity Sigma II Series - Manual (Page 138)

4 Parameter Settings and Functions
4.4.1 Adjusting Offset
4-62
4.4 Setting Stop Functions
This section describes the procedure used to stop the SERVOPACK stably.
4.4.1 Adjusting Offset
„ When the Servomotor Will Not Stop
The servomotor may rotate at very low speed and not stop even when 0 V is specified as the
reference voltage for SERVOPACK speed and torque control (analog reference). This hap-
pens when the reference voltage from the host controller or external circuit is slightly offset
(in mV units). The servomotor will stop if this offset is properly adjusted to 0 V.
„ Reference Offset Adjustment
The following methods can be used to adjust the reference offset to 0 V.
If a position loop is formed in the host controller, be sure to make manual offset adjustment and do not
make automatic reference offset adjustment.
See the following sections in Chapter 6 Using the Digital Operator for more details on
adjustment procedures.
Automatic Adjustment of
Reference Offset The reference offset value is automatically set to 0 V.
Manual Adjustment of
Reference Offset The reference offset value can be adjusted manually.
Automatic Adjustment of
Reference Offset 6.2.3 Automatic Adjustment of the Speed and Torque Refer-
ence Offset
Manual Adjustment of
Reference Offset 6.2.4 Manual Adjustment of the Speed and Torque Reference
Offset
Offset
Offset adjustment
Reference
voltage
Reference speed
or toruque
Reference
voltage
Reference speed
or toruque
Offset
corrected by
the SERVOPACK
IMPORTANT