Limit Switch Adjustments - HySecurity StrongArm 14F Programming And Operations Manual

full close position. (You may need to turn the close brake valve clockwise later to make a smooth
drift from limit contact to full position.)
4. The next vlave to be adjusted is the open brake valve; which is the second brake valve to the left of
the relief valve. At this time the arm is now in the closed position.
a. To adjust the open brake valve you will first need to turn the adjuster counter clockwise to the
top of its adjustment.
b. Give the operator an "Open" command and slowly begin turning the close brake valve adjuster
screw clockwise until the arm begins to move open smoothly and at the same speed as it did when
you lowered it to the close position. As the arm raises and trips the limit switch, it should smoothly
drift to full open position. (You may need to turn it clockwise later to make a smooth drift to stop.)
5. Adjust the manual bypasss valve by raising the arm approximately 45 degrees and press the "Stop"
button.
a. Turn the bypass needle valve, adjuster screw clockwise until it bottoms out.
b. Pull out on the manual by-pass knob and lock it open by twisting it 45 degrees to the right.
c. Slowly turn the needle valve adjuster screw counter clockwise until the arm begins to drift close
at a smooth slow speed. Tighten the lock nut for the needle valve adjuster screw and turn the
manual bypass knob 45 degrees to the left to lock it in place.
6. Cycle the operator open and close several times too verify settings and tighten the brake valve lock
nuts.
NOTE: The brake valves do not control the closing of the arm when the manual bypass knob is pulled.
NOTE: Careful adjustment of the open limit switch and brake valve may be especially important in installations where there is truck
traffic and the gate operator is close to the edge of the road. Be aware that the later the open limit switch trips when the gate is
opening, the sooner the open circuit will be able to accept a safety reverse when the arm is closing. The best adjustment requires a
rapid, but smooth, stop of the arm at the end of the open cycle.
l s
iMit WitCh
For the arm to stop smoothly, when opening or closing, the
limit switches must trip approximately ten degrees before the
arm achieves full travel.
1. Press Close and observe whether arm stops horizontal
and level.
• To lower arm, adjust Close Limit Cam outward
(toward the StrongArm access door panel).
• To raise arm, adjust Close Limit Cam inward
(toward the rear panel).
2. Press Open. Position the arm so it stops within 10°
of vertical.
• To raise arm, adjust Open Limit Cam outward.
• To lower the arm, adjust Open Limit Cam inward.
MX3657-01 Rev. D ©2020
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Initial Setup
Inward
Outward
Closed
Limit Cam
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Open
Limit Cam
Limit switches
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