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Sigma II User's Manual
5.4 Setting Stop Functions
This section describes the procedure used to stop the servo amplifier properly.
5.4.1
Adjusting Offset
n
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 refer-
ence). 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 prop-
erly adjusted to 0V.
Reference
voltage
n
Reference Offset Adjustment
The following methods can be used to adjust the reference offset to 0V.
Adjustment Method
Automatic Adjustment of Reference Offset
Manual Adjustment of Reference Offset
Note: Use manual rather than automatic adjustment if a position control loop is formed in the host control-
ler.
See the following sections in Chapter 7 Using the Digital Operator for more details
on adjustment procedures.
Adjustment Method
Automatic Adjustment of Reference
Offset
Manual Adjustment of Reference
Offset
Offset
Reference
Offset adjustment
speed or
torque
7.2.3 Automatic Adjustment of the Speed and Torque Reference Offset
7.2.4 Manual Adjustment of the Speed and Torque Reference Offset
Chapter 5: Parameter Settings and Functions
Reference
voltage
Reference
speed or
torque
Result
The reference offset is automatically adjusted to 0V.
The reference offset can be set to a specified value.
Reference Source
5-60
Offset
corrected by
the servo
amplifier
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