Nice ALTO Instructions And Warnings For Installation And Use page 43

c) - On Graph 3 note the obtained value B on the horizontal axis and
from this point, trace a vertical line until it intersects the line with your
maximum leaf opening angle (see example in graph).
d) - On Graph 3 trace a horizontal line passing through each point of
intersection created between the previously traced vertical line and
the line with your maximum leaf opening angle.
Then on the vertical axis, read all values of "A" including those
between the traced horizontal lines (see example in graph) and
where feasible select the minimum possible value. This will be the
required value A.
e) - On the post, note the selected value "A" and trace a vertical line from
this point (fig. 11). The line must intersect the horizontal line already
present; these two lines will serve as a reference for subsequent fix-
ture of the gearmotor.
f) - Lastly, release the gearmotor with reference to the chapter "Manually
locking and releasing the gearmotor", in the "Operation Manual".
A
11
GRAPH 3
(see paragraph 3.4)
300
A
250
200
150
100
50
mm 0
7 – English
A
B
B
110° 105° 100° 95°
50
05. Determining the procedure to be followed to complete gear-
motor installation.
CAUTION, VERY IMPORTANT!
At this point if there is a wall, pole or other fixed ele-
ment behind the post, to determine whether this may
obstruct complete rotation of the arm, measure dis-
tance E (fig. 12), i.e. the space between the previously
traced vertical line on the post at the closest point of
the obstacle. Then,
- if distance E is between 80 mm (minimum) and 299
mm (maximum), continue installation according to pro-
cedure 4.1B. (this envisages shortening of the arm);
- if distance E is equal to or greater than 300 mm, con-
tinue installation according to procedure 4.1A (this en-
visages the standard arm length as supplied).
12
E
90°
100 150
B = 145
E E
EXAMPLE: if a maximum opening angle
of 105° is required, and value B on the
gate post is measured at 145 mm, value
A can be selected from one of the values
from 125 to 150 mm or from 185 to 210
mm. In both cases, the minimum value
is recommended.
B
200 250