5
GB
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.
RB400, RB400
Leaf weight (kg)
% cycles
Maximum speed
allowed
Up to 200
100%
V6 = Extremely fast
200 ÷ 400
80
V5 = Very fast
400 ÷ 500
60
V4 = Fast
500 ÷ 600
50
V3 = Medium
600 ÷ 800
---
---
800 ÷ 900
---
---
900 ÷ 1000
---
---
Table 3: limits in relation to the weight of the leaf
Table 4: durability estimate in relation to the manoeuvre severity index
Severity index %
Robus
Durability in cycles
400
Leaf weight Kg
Up to 200
10
200 ÷ 400
30
400 ÷ 600 ----
600 ÷ 700
---
700 ÷ 800
---
800 ÷ 900
---
900 ÷ 1000
---
Leaf length m
Up to 4
10
4 ÷ 6
20
6 ÷ 8 25
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%
10
Presence of dust and sand
15
Presence of salinity
20
Photo manoeuvre interruption
15
Stop manoeuvre interruption
25
Speed greater than “L4 fast”
20
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.
Severity index %
Durability in cycles
