Elvox EBR1 Manual Del Instalador página 20

FRAGMA
BOOM ARM ASSEMBLING
To assemble the boom arm follow these 3 steps:
1 - Insert the boom hub in a vertical position in the spline shaft (Fig. 3). Attach the
backplate to the hub with 2 screws DTB10X50, 2 washers DRL10X20Z and 2
nuts M10 (Fig. 4), making sure to tighten the screws in an alternating manner in
which the strike is parallel to the plane of the hub.
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. 5).
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. 6).
The gear unit is irreversible so no external locking device is necessary to keep the
barrier in securely engaged in close position.
ADJUSTING THE BALANCING SPRINGS
No balancing springs are generally provided with the barrier.
It is therefore necessary to order the balancing springs in according with the
SPRINGS CHOICE AND ADJUSTMENT TABLE. In fact, the
kind of springs suitable for the balancing depends on length
and kind of the boom arm, kind and number of accessories
installed.
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.
LIMIT 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).
SLOWING 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.
20
G
H
mm
CLOSING
CAMS
SLOW CLOSING
CAMS
SLOW
OPENING
CAMS
EN
3
5
F
7
4
6
E
8
OPENING
CAMS
9
K
10
11