Rev B
Doc 6001343 (01-20299)
11 of 40
H. GATE ARM ADJUSTMENT FOR TYPICAL INSTALLATION
Although preset at the factory, the turnbuckle may have to be adjusted to ensure the gate arm is level. If
required, adjust the turnbuckle as follows:
1.
Make sure the unit power switch is off.
2.
Rotate the gearbox pulley by hand until the crank arm is parallel with the turnbuckle shaft at its
highest point of travel (see Figure 9).
3.
If the gate arm is not level, loosen both turnbuckle jam nuts and rotate the shaft until the gate arm is
parallel with the ground, then retighten the two jam nuts.
NOTE:
While the arm is raising, the upper and lower cranks should travel toward the side access cover.
Figure 9. Gate Arm Adjustment.
I. LIMIT CAMS
Gate operator limit cams are factory adjust for 90 degree arm swing and are not to be adjusted in the
field, except during limit cam or limit switch bracket replacement.
J. GATE SENSITIVITY ADJUSTMENTS
The gate operator monitors both average and peak motor current. When the gate encounters an
obstruction, the gate operator sense the change in motor current and stops or reverses the gate. Three
sensitivity adjustments are factory-set for most installation:
•
Right gate motion (R69)
@ 11:00 o’clock
•
Left gate motion (R160)
@ 11:00 o’clock
•
Inrush current (R203)
@ 9:00 o’clock
If you installation requires different sensitivity adjustments, use the following procedures:
♦
For Typical installation, set switch S1 to “Open to Left” position and use the “Typical Installation”
adjustment procedures below. For Restricted Installation, set S1 to “Open to Right” position and
use the “Restricted Installation” adjustment procedures.
♦
The minimum sensitivity is full clock wise and maximum sensitivity is full counter clockwise. These
adjustments must be made while the gate is in motion.
♦
Before starting the adjustments, verify that the Left and Right reverse pots are set fully clockwise,
and the Inrush pot is set to the 9 o’clock position (see Figure 10).
IMPORTANT:
Current flow varies with temperature. Do not tune the sensitivity measurements too
finely, or they may change with the time of day or seasons.
♦
Make all adjustments in the order listed.
