FAAC 740, Manual

Page: 5 / 21

4
Fig.10
5.4. Assembling the rack
5.4.. Steel rack to weld (Fig. )
1) Fit the three threaded pawls on the rack element, positioning
them at the bottom of the slot. In this way, the slot play will
enable any future adjustments to
be made.
2) Manually take the leaf into its
closing position.
3) Lay the first section of rack level
on the pinion and weld the threa-
ded pawl on the gate as shown
in Fig. 13.
4) Move the gate manually, che-
cking if the rack is resting on the
pinion, and weld the second and
third pawl.
5) Position another rack element end to end with the previous
one, using a section of rack (as shown in Fig. 14) to synchronise
the teeth of the two elements.
6) Move the gate manually and weld the three threaded pawls,
thus proceeding until the gate is
fully covered.
5.4.2. Steel rack to screw
(Fig. 2)
1) Manually take the leaf into its
closing position.
2) Lay the first section of rack level
on the pinion and place the spa-
cer between the rack and the
gate, positioning it at the bottom
of the slot.
3) Mark the drilling point on the gate. Drill a Ø 6,5 mm hole and
thread with an M8 male tap. Screw the bolt.
4) Move the gate manually, checking if the rack is resting on the
pinion, and repeat the operations at point 3.
5) Position another rack element end to end with the previous one,
using a section of rack (as shown in figure 14) to synchronise the
teeth of the two elements.
6) Move the gate manually and carry out the securing operations
as for the first element, thus proceeding until the gate is fully
covered.
Notes on rack installation
• Make sure that, during the gate travel, all the rack elements do
not exit the pinion.
• Do not, on any account, weld the rack elements either to the
spacers or to each other.
• When the rack has been installed, to ensure it meshes correctly
with the pinion, it is advisable to lower the gearmotor position
by about 1.5 mm (Fig.15).
• Manually check if the gate correctly reaches the mechanical
limit stops maintaining the pinion and rack coupled and make
sure there is no friction during gate travel.
• Do not use grease or other lubricants between rack and
pinion.
6. START-UP
6.. Control board connection
Before attempting any work on the board (connections,
programming, maintenance), always turn off power.
Follow points 10, 11, 12, 13 and14 of the GENERAL SAFETY
OBLIGATIONS.
Following the instructions in Fig. 3, route the cables through the
raceways and make the necessary electric connections to the
selected accessories.
Always separate power cables from control and safety cables
(push-button, receiver, photocells, etc.). To avoid any electric noise
whatever, use separate sheaths.
6... Earthing
Connect the earth cables as shown in Fig.16 ref.A.
6..2. Electronic control unit
In the gearmotors, the electronic control unit is fitted to an adjustable
support (Fig. 16 ref. 1) with transparent lid (Fig. 16 ref. 3).
The board programming push buttons (Fig. 16 ref. 4) have been
located on the lid. This allow the board to be programmed without
removing the lid.
For correct connection of the control unit, follow indications the
specific instructions:
6.2. Positioning the limit switches
Important : For correct positioning of the limit switch magnets,
the control unit must be installed and correctly connected to all
control and safety accessories.
The operator is fitted with a magnetic limit switch which
commands the gate to stop at the moment when the magnet, fixed
in the upper part of the rack, activates the sensor. The magnets
supplied with the operator are suitably polarised and activate only
one sensor contact, the closure contact or the opening contact.
Important: For correct functioning of the operator, the magnet
with the circle must be positioned to the right of the motor and, vice
versa, the magnet with the square must be positioned to the left of
the motor (SEE FIGURE 8)
Values are expressed in mm
Fig.14
Fig.13
Fig.11
Fig.12
Fig.16
Fig.15
Values are expressed in mm