6-1624822 rev. 08 11/01/2012
G
B
B
OOM ARM ASSEMBLING
To assemble the boom arm follow these 3 steps:
1 - Fit the base of the fixing hub in vertical position onto the main shaft,
by using the DSB10X45I screw. Fasten it tight (Fig. 3).
2 - Fix the U shape profile onto the base of the fixing hub, by using the
four DTB8X20I screws and their washers. Do not tighten the screws
to allow the boom arm to slide into the fixing hub (Fig. 4).
3 - Fit the black plastic caps at the both ends of the boom arm. Insert the
boom arm into the fixing hub and fasten the four screws tight (Fig. 5).
The gear unit is irreversible so no external locking device is necessary
to keep the barrier in securely engaged in close position.
A
DJUSTING THE BALANCING SPRINGS
Adjusted balancing springs are generally provided with the barrier.
If the boom arm tends to drop too quickly when it is disengaged from the
gearmotor, adjust the balancing springs in the following way:
1 - With the boom arm engaged to the gearmotor, press the open
command of the control board to lift the boom arm until the barrier
is completely opened.
2 - Switch off the motor power supply. Screw clockwise the ring nut of
the balancing-unit to increase the spring compression degree. Use
the second ring nut to block the first one (Fig. 6).
To check if the boom arm is balanced perfectly, disengage the boom
arm from the gearmotor and move the boom by hand. The boom should
slightly tend to rise.
L
IMIT SWITCH SETTING
The barrier is supplied with the electrical limit switches and the
mechanical stoppers already set to allow optimum boom arm movement.
If the base plate cannot be cemented on a horizontal plane, the boom
might be not perfectly horizontal or vertical. To avoid this, it is possible
to trim the trajectory of the boom by adjusting the mechanical stoppers
and the electrical limit switches (Fig. 7):
1 - Use a No.19 hexagonal wrench to loosen the retaining nuts
(F)
and
a No.8 allen key to loosen or tighten the countersunk screws
(G)
.
Trim the mechanical stoppers to find the desired boom arm trajectory
angle.
2 - Having done this, the electrical limit switches now have to be set.
To do this you must use a Philip’s head screwdriver to loosen the
fastening screws
(E)
of the electric limit switch cams (Fig. 8). Once
the rod is positioned at the base of the mechanical stop plate, just
move the cams as shown in Fig. 9 in order to make the micro limit
switch trip.
3 - Fasten tight the fixing screws
(E)
.
S
LOWING ACTION ADJUSTMENT
Normally the barrier is supplied with a slowdown limit switch already
adjusted to allow the ideal rod motion.
In cases where it is necessary to change the slowdown parameters, just
adjust the appropriate cams (Fig. 10) by loosening the fastening screws
with a Philip’s head screwdriver
K
(Fig. 10).
The slowdown cams are independent from the limit switch adjustment
cams (by moving them, the Open and Close cams are not modified)
and they are separate from each other (Slow opening - Slow closing).
After you have adjusted them, tighten the fastening screws and check
that the barrier is working properly by making a complete opening and
closing movement.
Note: It is recommended to anticipate the slow-opening limit
switch to avoid the bounce-back of the rod once it has arrived at
the mechanical plate.
11
4
3
5
6
H
mm
8
E
7
G
F
10
K
SLOW CLOSING
CAMS
SLOW
OPENING
CAMS
9
OPENING
CAMS
CLOSING
CAMS
Содержание BRT FAST
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