Controlled Products Systems Group 6300-080 - Manual (Page 39)

3.4 Entrapment Sensing Adjustment
This vehicular gate operator is equipped with an inherent adjustable clutch (Type C) that is used as
the primary entrapment sensing system. The clutch will slip upon sensing an obstruction in either the
opening or closing gate cycle and will cause the gate operator to reverse direction should an
obstruction be encountered. For this system to function correctly, the gate must be properly installed
and work freely in both directions. A good set of roller bearing hinges is essential for proper swing
gate operation.
3.4.1 Clutch Adjustment
1. Be sure power to the operator is turned OFF whenever adjustments to the clutch are
being made. Loosen the upper jamb nut to "un-lock" the lower jamb nut then loosen the
lower jamb nut. (See figure 23 on the preceding page)
2. Manually move the gate so that it is positioned approximately half way open.
3. Tighten the lower jamb nut so that it is finger tight then tighten it one turn with a wrench.
Re-tighten the upper jamb nut.
4. Apply power to the gate operator and momentarily short across terminals 11 and 20 with
a 1-foot piece of 18 AWG wire. When the gate begins to open, determine if the clutch is
slipping. If the clutch is slipping, turn power OFF and tighten the lower jamb nut one
more turn. This process may have to be repeated several times to get the right clutch
adjustment. Always start the gate from the half open position when adjusting the clutch.
5. After adjusting the clutch so that the gate opens and closes without it slipping, obstruct
the gate while it is in the opening cycle. The clutch should slip with no more than 40 Lbs
of force for approximately 2 seconds, and then the operator should reverse the direction
of travel of the gate. If the clutch does not slip, it is too tight. Repeat step 4 and re-adjust
the clutch. NOTE: After the gate has reversed, the operator will be in a "soft shutdown"
making it necessary to initiate the cycle again by momentarily shorting across terminals
11 and 20.
6. Repeat step 5. Obstruct the gate while it is in the closing cycle. The clutch should slip
with no more than 40 Lbs of force for approximately 2 seconds, and then the operator
should reverse the direction of travel of the gate. If the clutch does not slip, it is too tight.
Repeat step 4 and re-adjust the clutch. NOTE: After the gate has reversed, the operator
will be in a "soft shutdown" making it necessary to initiate the cycle again by momentarily
shorting across terminals 11 and 20.
7. The ideal clutch adjustment will allow the operator to move the gate through its entire
travel cycle without slipping, but will slip upon contact with an obstruction with no more
than 40 Lbs of force. This force can be measured with a gate scale, DoorKing P/N 2600-
225.
3.4.2 Secondary Entrapment Protection System
In addition to the mechanical slip clutch, this operator uses an inherent entrapment sensing system
(Type A) to further reduce the possibility of injury should an entrapment occur. The secondary
system is completely automatic and will be activated if the clutch fails to slip when an obstruction
between the open and close limit settings is sensed. This feature requires no adjustment by the
installer or end user.
6300-065-E-4-08 Page 39