Caution, Operator setup (cont.), Open and close limit adjustment – Linear VS-GSWG User Manual

Page 8: Limit nuts rough adjustment, Limit nuts fine adjustment, Setting speeds using lso-2 & lsc-2, Right-hand installation, Left-hand installation

VS-GSWG Swing Gate Operator Installation Guide

- 6 -

P1250 Revision X6 7-8-2011

Operator Setup (cont.)

Open and Close Limit Adjustment

The limit nuts are not preset at the factory and must be adjusted
for 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. REMOVE THE CARDBOARD FILLER
BEFORE ADJUSTING THE LIMIT NUTS.

The Controller is factory setup for right-hand installations.
The OPEN limit switches are the ones closer to the bottom
of the operator. In left-hand installations, the CLOSE limit
switches are the ones closer to the bottom of the operator
(see Figures 7 & 8).

Limit Nuts Rough Adjustment

Before running the operator, set the limit nuts as follows:

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

turn the power disconnect switch OFF.

2. To adjust the limit nuts, press down on the detent plate and rotate the

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

3. Adjust the OPEN limit nut until it is about 1/2” from activating the

LSO-2 OPEN limit switch.

4. Adjust

the

CLOSE limit nut until it is about 1/2” from activating the

LSC-2 CLOSE limit switch.

Limit Nuts Fine Adjustment

After fi nishing the rough limit nut adjustments, run the
operator to set the fi ne limit adjustment.

1. Turn the power disconnect switch ON.

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

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

4. 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 13-14).

Setting Speeds using LSO-2 & LSC-2

Limit switches LSO-2 and LSC-2 control when the operator
accelerates to maximum speed and decelerates to
minimum speed. It is recommended that LSO-2 and LSC-2
are adjusted fi rst so the gate slows to near stop before
hitting LSO-1 or LSC-1 as these will apply the brake upon
activation.

Adjust LSO-2 and LSC-2 by slightly loosening the two
screws which hold them in place and sliding toward or away
from the center of the limit box. Care must be taken not to
adjust too close to the center as the limit nut may travel past
the switch and start accelerating at the end of the cycle.

PRESS DETENT
PLATE DOWN

ROTATE
LIMIT NUT

Figure 9. Setting the Limits

LIMIT

SHAFT

BOTTOM OF

OPERATOR

CLOSE LIMIT
SWITCH (LSC-2)

OPEN LIMIT
SWITCH (LSO-2)

CLOSE LIMIT
SWITCH (LSC-1)

OPEN LIMIT
SWITCH (LSO-1)

CLOSE LIMIT NUT

OPEN LIMIT NUT

RIGHT-HAND

INSTALLATION

LSC-2 & LSO-2

CONTROL MOTOR

SPEED RAMP UP & DOWN

LSC-1 & LSO-1

CONTROL GATE

FULL OPEN AND CLOSE

Figure 7. Limit Box Assembly (Right-hand Installation)