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The length of the leaf makes it possible to determine both the maximum number of cycles per hour and consecutive cycles, while the weight
makes it possible to determine the reduction percentage of the cycles and the maximum speed allowed. For example, for ROBUS 1000 if
the leaf is 5 m long it will be possible to have 33 cycles/hour and 16 consecutive cycles. However, if the leaf weighs 700 kg, they must be
reduced to 50%, resulting in 16 cycles/hour and 8 consecutive cycles, while the maximum speed allowed is V4: fast. The control unit has a
limiting device which prevents the risk of overheating based on the load of the motor and duration of the cycles. This device triggers when
the maximum limit is exceeded. The manoeuvre limiting device also measures the ambient temperature reducing the manoeuvre further when
the temperature is particularly high.
The "durability" estimate is shown in chapter 8 "Technical characteristics", which is the average useful life of the product. The value is deeply
influenced by the severity index of the manoeuvre, this being the sum of all factors that contribute to wear. To perform this estimate, all severity
indexes in table 4 must be totalle d, then the estimated durability in the graph must be checked with the total result.
For example, when ROBUS 1000 is fitted to a gate weighing 650 kg and 5m in length, equipped with photocells and without other stress
related elements, it obtains a severity index equal to 50% (30+10+10). From the graph the estimated durability is equal to 80,000 cycles.
Table 2: durability estimate in relation to the manoeuvre severity index
Severity index
RB400 RB600 RB1000
%
Leaf weight (kg)
Up to 200
30
200 ÷ 400
60
400 ÷ 500
-
500 ÷ 600
-
600 ÷ 800
-
800 ÷ 900
-
900 ÷ 1000
-
Leaf length (m)
Up to 4
10
4 ÷ 6
20
6 ÷ 8
35
8 ÷ 10
-
10 ÷ 12
-
Other stress related elements
(to be taken into consideration if the probability that they occur is grea-
ter than 10%)
Surrounding
10
temperature
greater than
40°C or lower
than 0°C or
humidity greater
than 80%
Presence of
15
dust and sand
Presence of
20
salinity
Photo mano-
15
euvre interrup-
tion
Stop manoeuvre
25
interruption
Speed greater
20
than "L4 fast"
Thrust active
25
Severity index total%:
Note: if the severity index exceeds 100%, this means that the conditions are beyond the acceptable limits; a larger model is therefore
advised.
4 – English
RB250HS
10
5
60
30
10
-
50
20
-
-
30
-
-
40
-
-
50
-
-
60
-
10
5
15
20
10
25
35
20
40
-
35
-
-
50
-
10
10
10
15
15
15
20
20
20
15
10
20
25
20
30
20
15
25
25
20
25
RB500HS
30
40
60
-
-
-
-
15
25
35
-
-
10
15
20
20
30
25
25
Durability in cycles
Severity index %
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