YASKAWA SGMAH, User Manual

Page: 146 / 488

Sigma II User’s Manual Chapter 5: Parameter Settings and Functions
5-62
5.4 Setting Stop Functions
This section describes the procedure used to stop the servo amplifier properly.
5.4.1 Adjusting Offset
When the Servomotor Will Not Stop
The servomotor may rotate at very low speed and not stop even when 0V is specified
as the reference voltage for servo amplifier speed and torque control (analog
reference). This happens 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 0V.
Reference Offset Adjustment
The following methods can be used to adjust the reference offset to 0V.
Note: Use manual rather than automatic adjustment if a position control loop is formed in the host con-
troller.
See the following sections in Chapter 7 Using the Digital Operator for more details
on adjustment procedures.
Adjustment Method Result
Automatic Adjustment of Reference Offset The reference offset is automatically adjusted to 0V.
Manual Adjustment of Reference Offset The reference offset can be set to a specified value.
Adjustment Method Reference Source
Automatic Adjustment of Reference
Offset
7.2.3 Automatic Adjustment of the Speed and Torque Reference Offset
Manual Adjustment of Reference
Offset
7.2.4 Manual Adjustment of the Speed and Torque Reference Offset
Offset
Offset adjustment
Reference
voltage
Reference
voltage
Reference
speed or
torque
Reference
speed or
torque
Offset
corrected by
the servo
amplifier