SMC Networks RS2H Series, Operation Manual

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2. Model selection
The flow chart below shows the general procedure to select the optimum model in the RS2H series to suit
the operating requirements.
Operating conditions
1. Mass of transferred object: m
A
2. Transfer speed: v (m/min)
(kg)
3. Operating pressure: P (MPa)
4. Coefficient of friction of conveyor
: μ
Input operating requirements.
↓
Determine cylinder bore size temporarily.
↓
Calculate allowable maximum impact load
m
max
by
using conveyor friction coefficient μ.
Refer to Table 1
* m
max
allowable impact depends on
conveyor friction coefficient.
↓
m
A
≦
m
max
↓
YES
Calculate allowable mass of transferred
object, m, at transfer speed v.
↓
For allowable range of m, refer to Figure-1-* (P6).
m
A
≦
m
↓
YES
Calculate lateral load F
↓
A
Calculate allowable lateral load F at
operating pressure P.
For relationship between lateral load F and operating
pressure P, refer to Figure-2-1 (P7).
↓
F
A
≦
F
↓
YES
Determine final model.
Figure-1. Impact of transferred object
Model selection example
Operating conditions
1. Mass of transferred object: 200 (kg)
2. Transfer speed: 20 (m/min)
3. Operating pressure: 0.5 (MPa)
4. Coefficient of friction of conveyor: 0.1
↓
Cylinder bore size is determined as Ø50 temporarily.
↓
Table 1. RS2H Allowable maximum impact load m
max
(kg)
Bore size
Allowable maximum
impact load
μ=0.1 μ=0.2
Ø50 400 280
Ø63 530 365
Ø80 800 565
Confirmation of m
max
: 200
＜
400 (
μ=0.1)
↓
m=278(kg) at v=20(m/min) is found on Figure-1-1.
200
＜
278
↓
Lateral load: FA=m
A
×
μ×g
=200×0.1×9.8
=196(N)
↓
F=776(N) at P=0.5(MPa) is found on Figure-2-1.
196
＜
776
↓
RS2H50 is determined as the selected model
NO
NO
NO
Mass of transferred object m [kg]
Coefficient of friction
μ
Transfer speed v [m/min]
F
A
=m
A
×
μ×g (N)
(g: gravitational acceleration
: 9.8m/s
2
)