VDS AT PLUS Serie Manual Tecnico página 14

3.4. ASSEMBLING THE RACK
3.4.1. STEEL RACK TO WELD (fig.7)
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
threaded pawl on the gate.
4) Move the gate manually, checking 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 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.
3.4.2. STEEL RACK TO SCREW (fig. 8)
1) Manually take the leaf into its closing position.
2) Lay the first section of rack level on the pinion and place the
spacer 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 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.
3.4.3. NYLON RACK TO SCREW (fig. 9)
1) Manually take the leaf into its closing position.
2) Lay the first section of rack level on the pinion.
3) Mark the drilling point on the gate. Drill a Ø 4 mm hole and
thread with screw 6x20 mm with relative plate reinforcement.
4) Move the gate manually, checking if the rack is resting on
the pinion, and repeat the operations at point 2.
5) Position another rack element end to end with the previous
one, using a section of rack 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.(only for steel rack).
• 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.
• 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.
Fig. 7
4. START UP
4.1. CONTROL BOARD CONNECTION
ATTENTION:
Before attempting any work on the board (connections,
programming, maintenance), always turn off power.
4.2. ADJUSTING THE TORQUE TRANSMISSION
To adjust the torque transmission, act on the screw placed on
the engine (Fig. 10):
- Rotate the screw clockwise to encrease the torque
transmission.
- Rotate the screw anticlockwise to decrease the torque
transmission.
CAUTION: THE MOTOR IS PROVIDED WITH THE CLUTCH
R E G U L AT E D AT M A X . S H O U L D B E R O TAT E
ANTICLOCKWISE THE SCREW, UP TO ACHIEVE THE
OPTIMAL ADJUSTMENT.
Fig. 8
(only for AT 2500)
Fig. 9
Fig. 10