Rev B
Doc 6001343 (01-20299)
27 of 40
E. LIMIT CAMS
Gate operator limit cams are factory adjusted for 90 degree arm swing, and never need to be adjusted in
the field. However, if long-term use requires replacing the limit cams, use the following procedure to
install and adjust the replacement limit cams.
•
Remove old limit cams by loosening the locking screws and removing cams from the shaft.
•
When installing replacement limit cams, ensure that the limit cams are centered over their
corresponding limit switches.
•
Small adjustments are magnified by the length of the gate.
•
To avoid damage to the gate and gate operator due to the gate overrunning it limits, perform the
following steps carefully:
1. REPLACING AND ADJUSTING LIMIT CAMS IN A TYPICAL INSTALLATION
Figure 13. Setting Limit Cams for Typical Installation.
1.
Make sure that switch S1 is set to the “Left” position.
2.
Turn on gate operator power switch.
3.
Using manual CLOSE and STOP, move the gate to its proper closed limit position.
4.
If not already loose, loosen the locking screw on the left limit cam and turn the cam counter-
clockwise until it just barely closes the limit switch.
5.
Tighten the left limit cam locking screw.
6.
Using manual OPEN and STOP, move the gate to its proper opened limit position.
7.
If not already loose, loosen the locking screw on the right limit cam and turn the cam clockwise until
it just barely closes the limit switch.
8.
Tighten the right limit cam locking screw.
9.
Open and close the gate to check the limit cam settings. If required, readjust the limit cams until
they are set properly.
