Beck 14-100, Инструкция по эксплуатации

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36
80-1403-01, Rev. 3
Setting Over-travel Limit
Switches RET and EXT
This procedure should be used if the factory
over-travel switch settings must be changed in the
field. It is advisable to operate the actuator fully in
each direction—using the electric Handswitch—to
check switch settings before attempting to change
them. Use the following instructions if they require
adjustment:
F Loosening/Tightening Switch Cam
1. Remove the top cover (15/16" bolt head). The
O-ring seal will remain in the rim of the top
cover when removed. Open the terminal block
cover (1/2" bolt head).
2. Use the electric Handswitch to drive the control
shaft so that the EXT switch cam is accessible.
Using a 7/64" hex wrench, loosen the screw so
that the cam is just snug to the shaft (see figure
above).
3. Use the Handwheel to position the control
shaft so that the lever of the sector-lever gear
assembly is parallel with the upper bearing
plate. See figure below for location of lever
and bearing plate.
4. Disconnect power from the actuator.
5. Connect the continuity meter across terminals
B and V. Rotate the cam until the meter
shows no continuity (switch contact opens;
switch clicks).
6. Tighten the cam locking screw to 5 Ib-in (0.56
N•m) torque.
7. Disconnect the meter and reconnect switch
wires and actuator power.
8. Using the Handswitch, drive the output shaft to
the fully retracted position. Note the direction
of rotation of the lobe of the cam. The correct
cam lobe motion is away from the switch lever
with the switch lever on the lower part of the
cam. If this is not correct, return to step 2 and
reset the cam to the proper orientation.
9. Drive the output shaft again to the fully
extended travel limit. If the correct stopping
point is reached (lever parallel with the upper
bearing plate), the switch is properly set.
10. Manually position the control shaft position
indicator dial to zero.
11. With the Handswitch, move the control shaft
until the position indicator dial reaches the
150° position.
12. Repeat the instructions for setting the RET
travel limit except that the direction of motion
is opposite to that used for the EXT switch
setting. Connect the continuity meter across
terminals B and U.
13. Close the covers and tighten the terminal
cover bolt to 10 Ib-ft (13.5 N•m). Tighten the
top cover bolt just enough to compress the
O-ring seal.
Setting Auxiliary Switches
Standard switch settings for actuators with 2
or 4 auxiliary switches are shown on the diagram
on page 35. The operating point of all auxiliary
switches is defined as a percentage of output
shaft travel. 100% is defined as the retracted
limit of shaft travel. The heavy line indicates
a closed circuit. Follow these instruc tions to
change the operating point of auxiliary switches:
NOTE: In the following procedure, it is
assumed that switch settings are to be
adjusted so that contacts are open when the
desired position is achieved. If they are to
be adjusted to close, it may be necessary to
reverse the operating mode of the switch by
reversing the leads on the switch itself. Be
sure to disconnect power from the switch
terminals first.
F Lever and Bearing Plate
CONTROL END