Gain And Speed Adjustments; Gain Adjustment; Span Adjustment Graph; Gain Hinge Springs - ABB AV1 Operating Instructions Manual

GAIN AND SPEED ADJUSTMENTS

Gain Adjustment

100
OUTPUT
POSITION
50
(0 TO 100%
TRAVEL)
0
0
Figure 4-4. Span Adjustment Graph
Gain and speed adjustment information applies to both the Type
AV1 and Type AV2 positioners. This is the gain of the overall posi-
tioner. The factory-installed 0.25-millimeter (0.100-inch) gain
hinge spring suits most applications. This adjustment is not a
mandatory part of calibration.
Gain adjustment on the Type AV positioners is accomplished by
changing the gain hinge spring (Item 7, Figs.
ing the beam assembly to the positioner housing. Provided with
each positioner are two different gain hinge springs. If actuator
oscillation occurs, the overall positioner gain may be too high.
Positioner gain is related to the thickness of the gain hinge spring.
Gain decreases as the thickness of the gain hinge spring
increases. Refer to Table
For information on changing the gain hinge spring, refer to
Hinge Spring in Section
Table 4-1. Gain Hinge Springs
Part Number
2
5400264_1
5400264_2
NOTES:
1. For small actuators, it may be necessary to combine both

gain hinge springs.

2. The high gain hinge spring comes installed from the fac-
tory.
CALIBRATION
50
INPUT SIGNAL
(0 TO 100%)
9-3
4-1 for hinge information.
8.
1
Thickness
Gain
mm in.
0.25 0.010 High
0.76 0.030 Medium
GAIN AND SPEED ADJUSTMENTS
100
T00776A
or 9-4) connect-
Gain
4 - 5