Type 4000
7
Table 3. Cam Position and Identification Cover Selection
Information
Actuator Travel
Cam
Lobe
Cam Orientation for
Actuator Failure Mode
Identification
Cover
Actuator Travel
Lobe
Fail Open
Fail Close
Cover
Markings
greater than
0.75 inch (19.1 mm)
60
D
R
P5FV60R
less than or equal to
0.75 inch (19.1 mm)
30
D
R
P5FV30R
actuator travels greater than 3/4-inch (19.1 mm). Refer
to table 3 to select the correct identification cover.
Cam Adjustment
Refer to figure 9. With the cover and indicator re-
moved, loosen the screw and turn the cam locking nut
counterclockwise until the cam loosens.
The cam has two lobes. The 30 degree lobe is used
for actuator travels of 3/4-inches (19.1 mm) or less.
The 60 degree lobe is used for actuator travels of
greater than 3/4-inch (19.1 mm). The cam also may be
turned over. Each lobe is stamped either direct (D) or
reverse (R). Refer to table 3 for cam installation infor-
mation.
Install the cam so that the follower will ride on the cor-
rect lobe listed in table 3. For fail-open actuators, the
follower will ride on the cam lobe above the follower.
For fail-close actuators the follower will ride on the
cam lobe below the follower.
To secure the cam, make sure the screw is backed
out from the locking nut. Tighten the locking nut finger
tight then tighten the screw. Install and adjust the indi-
cator and reinstall the cover.
Indicator Adjustment
To adjust the indicator, remove the front cover and pull
the indicator upwards until it comes off the Allen
screw. Before installing the indicator make sure that
the Allen screw is tight. Press the indicator on the
screw and adjust it by rotating clockwise to the desired
position.
Calibration
Pre-calibration
Ensure that the cam is installed correctly for the ap-
propriate actuator travel and failure mode. Refer to the
“Cam Adjustment” procedure. Also ensure the pin on
the feedback lever arm assembly is positioned correct-
Figure 9. Cam Adjustment
CAM LOCKING NUT
SCREW
CAM
CORRECT
INCORRECT
CAM
FOLLOWER
1/16-INC H
(1–2 mm)
CAM POSITIONED FOR A FAIL-OPEN
ACTUATOR WITH 3/4-INCH (19.1 MM)
OR LESS TRAVEL
A7197-1 / IL
ly for the appropriate actuator travel. Refer to step 7 in
the “Positioner Mounting” procedure.
With the two locking screws facing you, as shown in
figure 10, there should be at least one coil of the feed-
back spring above the screws. However, the end of
the feedback spring should not touch the spring guide.
To adjust the spring, loosen the two locking screws.
Hold the two locking screws in place while rotating the
feedback spring. Tighten the locking screws.
