g. If the actuator has over-traveled, rotate Cam 2 slightly counter-clockwise, then move the actuator towards the fail
position electrically. Stop and electrically reverse the direction of travel. Move the actuator until Cam 2 operates
Switch 2 and the actuator stops. Repeat this procedure until the actuator is properly positioned.
h. Rotate Cam 4 until it comes in contact with Switch 4’s arm roller and the switch just “breaks”. A light “click” can be
heard. Rotate the cam slightly counter-clockwise. (This ensures that Switch 4 will “break” just prior to the actuator
reaching the extreme opposite end of travel.) Tighten the setscrews on Cams 2 and 4.
Switch adjustments for counter-clockwise spring fail operation (viewed from the top of the actuator)
a. Ensure the actuator is de-energized and positioned in the counter-clockwise (fail) position. Loosen the setscrews on
Cams 2 and 4. Rotate both clockwise until they clear the switch arm rollers of switches 2 and 4.
b. Rotate Cam 2 counter-clockwise until it comes in contact with Switch 2’s roller arm and the switch “breaks”. A light
“click” can be heard. Tighten the setscrews on Cam 2.
c. Rotate Cam 4 counter-clockwise until it comes in contact with Switch 4’s arm roller and the switch just “breaks”. A
light “click” can be heard.
d. Rotate Cam 4 slightly further in the counter-clockwise direction. (This ensures that Switch 4 will ”break” just prior to
the actuator reaching the full fail position.) Tighten the setscrews on Cam 4. Energize the actuator. This will move
the actuator to the opposite end of travel.
e. Upon reaching the opposite end of travel, Cam 1 should just engage the roller on Switch 1 so that the switch just
“breaks”. This action will stop the actuator. Check that the actuator has properly positioned the driven equipment.
f. If actuator travel is insufficient, rotate Cam 1 slightly counter-clockwise until the cam just clears the roller of Switch 1.
As soon as the cam clears the roller, the actuator will “bump” electrically towards the end of travel. Continue until
the actuator reaches the full end of travel.If the actuator has over-traveled, rotate Cam 1 slightly counter-clockwise,
then move the actuator towards the fail position electrically. Stop and electrically reverse the direction of travel.
Move the actuator until Cam 1 operates switch 1 and the actuator stops. Repeat this procedure until the actuator is
properly positioned.
g. If the actuator has over-traveled, rotate Cam 1 slightly clockwise, then move the actuator towards the fail position
electrically. Stop and electrically reverse the direction of travel. Move the actuator until Cam 1 operates switch 1 and
the actuator stops. Repeat this procedure until the actuator is properly positioned.
h. Rotate Cam 3 until it comes in contact with Switch 3’s arm roller and the switch just “breaks”. A light “click” can be
heard. Rotate the cam slightly further in the clockwise direction. (This ensures that Switch 3 will “break” just prior to
the actuator reaching the extreme opposite end of travel.) Tighten the setscrews on Cams 1 and 3.
6. Operate the actuator electrically several times to ensure proper operation and to verify that travel limits and stops are
correctly set.
7. De-energize the actuator to verify proper spring failure operation. Ensure the driven device is properly positioned in the
spring failure position.
8. If the actuator is supplied with an optional feedback potentiometer and/or position controller, verify proper calibration
of input and output signals after making cam adjustments.
9. Replace the actuator cover and cover screws.
10. The actuator is now ready for electrical operation.
2
C l o s e l y m o n i t o r t h e e l e c t r i c a l s t r o k e , a s t h e t r a v e l l i m i t s w i t c h e s
a r e n o t y e t p r o p e r l y a d j u s t e d . E n s u r e t h e a c t u a t o r d o e s n o t
o v e r- t r a v e l a n d d a m a g e t h e d r i v e n e q u i p m e n t .
C l o s e l y m o n i t o r t h e e l e c t r i c a l s t r o k e , a s t h e t r a v e l l i m i t s w i t c h e s
a r e n o t y e t p r o p e r l y a d j u s t e d . E n s u r e t h e a c t u a t o r d o e s n o t
o v e r- t r a v e l a n d d a m a g e t h e d r i v e n e q u i p m e n t .
SURE 49
