LTQ008 – LTQ230 Series 3-Phase
Products
User Instructions –
AIIOM000165
EN
Page
20
of
40
5.8.1
Adjusting CW End-of-Travel
1.
Reposition Mechanical Stop
a.
Disconnect power.
b.
Loosen the right-side mechanical stop. This is the CW mechanical stop
limit adjustment. Using a 17 mm wrench and a 5 mm hex key, hold the
jam nut and turn the stop screw 5 – 6 turns CCW so it clears the
mechanical box inside the actuator.
i.
This will allow the user to adjust the cam/switch stop position without
running into the mechanical stop screw.
c.
Use the manual override handwheel to position the actuator to the
required CW position. Keep all changes within ± 3° of the factory
settings.
2.
Adjust CW Cam (Bottom)
a.
Cam 1 is the bottom cam (red) and the end-of-travel adjustment for the
actuator CW position. With power off, and the actuator at its required
CW position, use a sharp 2.5 mm hex key to free up the cam set screw.
Take care not to let the hex key slip at this stage; it can easily strip out.
Once the screw is free, adjust it as detailed below:
i.
Rotate the hex key to the right 10 – 15° until an audible click is heard.
This will reset the switch roller arm.
ii.
Gently tighten (CW) the set screw (only until slight pressure is felt).
Ideally, the set screw rides along the camshaft.
iii.
Slowly
rotate the hex key to the left, pushing the cam, until an audible
click is heard on the bottom switch. The click means correct
adjustment has been achieved.
iv.
Tighten the cam set screw.
b.
Apply power and test for the correct CW position:
i.
Drive the actuator CCW at least 15 – 20°.
ii.
Drive the actuator CW until the cam stops the electrical travel.
iii.
Verify that the CW position matches the one required.
iv.
Repeat step 2a if further adjustment is needed.
3.
Tighten Mechanical Stop
a.
With the actuator in the proper position, hold the 17 mm wrench on the
right-side jam nut to prevent the jam nut from locking. Turn the 5 mm
hex key CW until the end of the stop screw bottoms out against the
internal stop boss.
b.
Turn the hex key
one full turn CCW
, and lock the position with the jam
nut. Now, the actuator will reach its end-of-travel electrically before
there is any interference from the mechanical stop.
c.
The CW position calibration is now complete.
Figure 6: CW mechanical stop
Figure 7: Cam 1 (bottom, CW
cam)
Figure 20: The CW limit switch shown
in the fully CW position
