Linear SLC User Manual download pdf (Page 8)

SLR • SLC • SLD Slide Gate Operator Installation Guide - 6 - 227968 Revision X19 8-11-2011

Operator Setup (Continued)

Limit Nuts Rough Adjustment

The limit nuts are not preset at the factory and must be

adjusted for the length of the gate in each installation. The

limit switches are activated by two threaded nylon rotary

limit nuts which are attached to a threaded limit shaft driven

by a chain and sprockets from the main drive shaft (see

Figure 8). REMOVE THE CARDBOARD FILLER BEFORE

ADJUSTING THE LIMIT NUTS.

The Controller is factory set for right hand installations. The

left limit nut is for OPEN and the right limit nut is for CLOSE.

The limit nuts ﬂ ip their deﬁ nition in left hand installations.

(see left-right hand programming on Page 11).

1. With the gate connected to the gate operator in a mid-travel position,

the power disconnect switch turned OFF, disconnect the operator

by using the manual disconnect lever, once the operator has been

disconnected, manually move the gate by hand to within a foot of

its fully open position (the foot of distance is necessary to allow for

coasting of the operator after the limit switch is tripped).

2. Once the gate is in this position, adjust the OPEN limit nut until it

activates the limit switch for open. Press down the detent plate and

rotate the nut along the threaded shaft (see Figure 9).

3. After setting the open limit, move the gate to one foot from fully

closed and repeat the process for the CLOSE limit nut (see Figure 9).

Limit Nuts Fine Adjustment

After ﬁ nishing the rough limit nut adjustments, reposition the

gate to approximately the center of travel.

1. Re-engage the operator using the disconnect handle.

2. Turn the power disconnect switch ON.

3. Stand clear of any moving parts and press the OPEN button.

4. After the gate opens, press the CLOSE button.

5. Observe the gate in both directions as it runs through each complete

cycle. Adjust the open or close limit nuts again if necessary. Fine

levels of adjustment can be made by adjusting a few teeth on the

nut at a time. If the gate stops during travel, you may need to adjust

the Open or Close Current Setting or the Maximum Run Timer (see

Pages 12-13).

PRESS DETENT

PLATE DOWN

ROTATE

LIMIT NUT

Figure 9. Setting the Limits

CAUTION

If the operator is installed in a left-hand installation. Set the

Controller to left-hand operation BEFORE running the operator

for the ﬁ ne setting of the limit nuts. Failure to do so will result

in over-shooting the limit switches, and can cause damage to

the operator and/or gate. Refer to programming on Page 11.

LEFT-HAND INSTALLATION

OPEN LIMITCLOSE LIMIT

RIGHT-HAND INSTALLATION

OPEN LIMIT CLOSE LIMIT

RIGHT-HAND

OPEN

DIRECTION

LIMIT

NUTS

LIMIT

SHAFT

LIMIT

SWITCHES

Figure 8. Limit Box Assembly

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