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Table 3: limits in relation to the weight of the leaf
Leaf weight (kg)
Up to 200
200 ÷ 400
400 ÷ 500
500 ÷ 600
600 ÷ 800
800 ÷ 900
900 ÷ 1000
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 sever-
ity indexes in table 4 must be totalled, 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 4: durability estimate in relation to the manoeuvre severity index
Severity index %
Leaf weight Kg
Up to 200
200 ÷ 400
400 ÷ 600
600 ÷ 700
700 ÷ 800
800 ÷ 900
900 ÷ 1000
Leaf length m
Up to 4
4 ÷ 6
6 ÷ 8
8 ÷ 10
10 ÷ 12
Other stress related elements
(to be taken into consideration if the probability that
they occur is greater than 10% )
Surrounding temperature greater than 40°C
or lower than 0°C or humidity greater than 80%
Presence of dust and sand
Presence of salinity
Photo manoeuvre interruption
Stop manoeuvre interruption
Speed greater than "L4 fast"
Thrust active
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.
RB600, RB600P
% cycles
Maximum speed
allowed
100%
V6 = Extremely fast
80
V5 = Very fast
60
V5 = Fast
50
V4 = Medium
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---
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Robus
600
1000
10
5
30
10
50
20
---
30
---
40
---
50
---
60
10
5
20
10
35
20
---
35
---
50
10
10
15
15
20
20
15
10
25
20
20
15
25
20
% cycles
100%
90
75
60
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50
---
45
---
40
Durability in cycles
RB1000, RB1000P
Maximum speed
allowed
V6 = Extremely fast
V5 = Very fast
V4 = Fast
V4 = Fast
V3 = Medium
V3 = Medium
V3 = Medium
GB
5
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