Servo Adjustment
6.1.4 Adjusting Offset
6 -4
6.1.3 Adjusting Gain
If speed loop gain or position loop gain exceeds the allowable limit for the servo system includ-
ing the machine to be controlled, the system will tend to vibrate or become too sensitive. Smooth
operation is not possible under such conditions, so reduce each loop gain value to an appropriate
value.
Refer to
6.2.1 Setting Servo Gain
for details regarding servo gain adjustment.
6.1.4 Adjusting Offset
The servo system does not operate smoothly if reference voltage from the host controller or ex-
ternal equipment has a reference offset value in close proximity to 0 V. In that case, adjust the
reference offset value to 0 V.
J
J
Reference Voltage Offset from Host Controller or External
Circuitry
Offset
Offset adjustment
Reference speed
or reference
torque
Reference
voltage
Reference
voltage
Reference speed
or reference
torque
Make offset
adjustment with the
Servopack
J
J
Reference Offset Adjustment
The following two methods are available to set the reference offset value to 0 V.
Reference offset automatic adjustment
The reference offset value is automatically set to 0 V.
Reference offset manual adjustment
The reference offset value can be adjusted manually.
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.
Refer to the following sections in
Chapter 7 Using the Digital Operator
for reference offset ad-
justment in detail.
Reference Offset Automatic Adjust-
ment
7.2.3 Automatic Adjustment of the Speed and Torque Refer-
ence Offset
Reference Offset Manual Adjustment
7.2.4 Manual Adjustment of the Speed and Torque Reference
Offset
6
IMPORTANT
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