Fig. 8
Fig. 9
Fig. 10
Fig. 11
Fig. 12
5
Meko manuale 1_2011
3.5 Assembling the rack
3.5.1 Installing the Toothed Rack B117 – PVC rack M4
20x26mm with inner steel frame (0.5m sections)
a)
Move the gate manually to its open position.
b)
Align the first section of the rack to the gate edge
and lower it on the pinion. Use a spirit-level to make
sure it is perfectly straight.
c)
Fix this first section of rack to the gate with the provided
self-tapping screws. Fix the screws in the in the
middle of the slot as illustrated (Fig. 8).
d)
Close the gate manually for about ½ meter, join the
second section of rack to first one and place it on
the motor drive pinion cog.
e)
Keep the rack perfectly flat and fix it to the gate.
f)
Repeat the same procedure until the gate is fully
covered.
g)
In case the last section of rack partially comes out
from the rack edge, do not cut it.
Add a bracket as a gate extension to support the
last bit of rack (Fig.9).
h)
To avoid the gates weight being supported by the
motors drive pinion cog, unscrew M10 screws and
adjust the four grub screws to lower a little the gear
motor. Then tighten again M10 screws and the
lock-nuts.
3.5.2 Welding Metal Toothed Rack B102 – steel rack M4
12x30mm (1m sections)
a)
Move the gate manually to its open position.
b)
Assemble the three threaded stand-offs on the first
section of rack, positioning in the middle of the slot
(Fig. 10).
c)
Align the first section of the rack to the gates edge
and lower it on the pinion. Use a spirit-level to ensure
the rack is perfectly straight and level.
d)
Weld the threaded stand-off to the gate (Fig. 11)
e)
Move the gate manually, checking that the rack is
always resting on the motors drive pinion cog, and
weld second and third stand-offs.
f)
Place the second section of rack side by side with
the first one, using an upside-down section of rack
to synchronise the rack teeth as illustrated in Fig. 12.
g)
Move the gate manually and weld the three threaded
stand-offs.
h)
Repeat the same procedure until the gate is fully
covered.
i)
In case the last section of rack partially comes out
from the rack edge, do not cut it.
Add a bracket as a gate extension to support the
last bit of rack (Fig.9).
l)
To avoid the gates weight being supported by the
motors drive pinion cog, unscrew M10 screws and
adjust the four grub screws to lower a little the gear
motor. Then tighten again M10 screws and the
lock-nuts.
Check the gate always reaches the mechanical stops
keeping the alignment between the rack and the
motor drive pinion cog. Ensure that there are no friction
points in the gates complete travel.
