IAI America LSA-S10SS - Manual (Page 28)

1. Specifications Check
22
1.3.3 Example for Judging Operation Availability by Operational Conditions
[Operating conditions]
• Applicable model : S8SS/S8SM type
• Speed : 2.0m/s
• Acceleration : 24.5m/s 2 (The deceleration is
assumed to be the same.)
• Travel : 1.5m
• Slider payload : 2kg
• The actuator moves back and forth over a stroke of 1.5m.
The above operation pattern can be illustrated by
the graph shown to the right.
Now, let’s start calculation according to “Selection Method.”
1) Figure out the maximum thrust of Condition 1.
Apply the above operation pattern to the aforementioned equation of maximum thrust.
Fa = (M +m) • a + Ff
Here,
M : Slider weight (1.7kg for the S8SS/S8SM)
m : Slider load (kg) : 2kg in this example
a : Commanded acceleration (m/s 2 ) : 24.5m/s 2 in this example
Ff : Traveling resistance (N) : 25N in this example
From above, Fa is calculated as follows:
Fa = (3.7 × 24.5 + 25) � 115.65N
The calculated value exceeds the maximum thrust 100N of the S8SS/S8SM.
Let’s lower the specified acceleration to 19.6m/s 2 . Fa changes as follows:
Fa = (3.7 × 19.6 + 25) � 97.52N.
The calculated value is smaller than the maximum thrust 100N of the S8SS/S8SM.
1G = 9.8m/s 2
Speed
Time
ta tf td
t