Nice SLH400

ENGLISH – 5
3.2.1 Product durability
The product’s durability is its average economic life value and is
strongly inuenced by the degree of severity of the manoeuvres:
in other words, the sum of all factors that contribute to product
wear.
To estimate the durability of your automated device, proceed
as follows:
1. add the values of the items in “Table 3” relative to the
system’s conditions
2. in the graph shown in “Figure 2”, from the value obtained
above, draw a vertical line until it intersects the curve;
from this point, draw a horizontal line until it intersects the
line of the “manoeuvre cycles”. The corresponding value
is the estimated durability of the product.
The durability values shown in the graph can only be obtained if
the maintenance schedule is strictly observed – see the “PROD-
UCT MAINTENANCE” chapter. The durability is estimated on
the basis of the design calculations and the results of tests ef-
fected on prototypes. Being an estimate, therefore, it offers no
explicit guarantee of the product’s actual useful life.
Example of durability calculation: automation of a gate with
a 4.5 m-long leaf weighing 250 kg, installed near the sea:
“Table 3” shows the severity indices for this type of installation:
10% (“Door length”), 15% (“Door weight”) and 15% (“Presence
of dust, sand or salt”).
These indices must be summed up to obtain the overall severity
index, which in this case amounts to 40%. With the value found
(40%), check the horizontal axis (severity index) of the graph
and identify the value corresponding to the number of “manoeu-
vre cycles” the product will be able to complete throughout its
life, equal to roughly 105,000 cycles.
Table 3
PRODUCT DURABILITY
Severity index
Leaf length
< 3 m
3 - 4 m
4 - 5 m
5 - 6 m
0%
5%
10%
20%
Leaf weight
< 200 kg
200 - 300 kg
300 - 400 kg
0%
15%
30%
Ambient temperature greater than 40°C
or below 0°C, or humidity greater than
80%
20%
Presence of dust, sand or salinity
15%
Motor speed setting greater than “L4
fast”
15%
0
10 20 30 40 50 60 70 80 90
100
20.000
40.000
60.000
80.000
100.000
120.000
140.000
160.000
180.000
200.000
220.000
240.000
260.000
Durability in cycles (No.)
Severity index (%)
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3.3 PRODUCT IDENTIFICATION AND OVERALL
DIMENSIONS
The overall dimensions and the label (A), which allows for iden-
tifying the product, are shown in “Figure 3”.
198 191
408
85
A
3