Type Av4 Positioner Motor Speed Adjustments - ABB AV3 Instruction Manual

CALIBRATION
GENERAL CALIBRATION
4 - 6
Figure 4-3. Type AV4 Positioner Motor Speed Adjustments
2. Set the FINE adjustment to the fastest speed (fully clockwise)
(Fig. 4-3).
NOTE: The fine adjustment potentiometer does not have an end
stop. At the end of travel a clutch within the potentiometer slips
to indicate that you have reached the end.
3. Apply pulse inputs until the actuator reaches 0%.
4. Using a stopwatch measure the time it takes the actuator to
reach 100% by applying a constant increase signal.
5. Having obtained an actuator speed value in Step 4, use Table
4-1 to determine the coarse speed adjustment setting which
encompasses the actuator speed.
6. Turn the FINE adjustment potentiometer counterclockwise
(Fig. 4-3) by an estimated number of turns to achieve a motor
speed that equals the speed of the actuator measured in Step 4.
EM I/EL EC T R O N IC S
H O U SIN G
SE RVO M OTO R W IR E
C O N N EC T IO N
C O A R SE
F IN E
T 00 3 17 A