Forces
Initial force
The force required to move the actuator away from its rest position.
Operating force
The force required to move the actuator through the operating point.
Sustaining force
The force required to hold the actuator in its ?nal position.
Reset force
The level to which the operating force must be reduced to allow the spring-
operated mechanism to return to its original position.
Differential force
The difference between the operating force and the reset force.
Final position
Conversion US-Units
Inch / millimeter
Generally, measures in this catalogue are based on the metric system and
indicated in millimeter (mm). For the conversion please use the following
relation:
1 millimeter = 0.03937 inches
Example: 27.8 mm x 0.03937 = 1.094 inches
And for the reverse calculation:
1 inch = 25. 4 millimeters
Example: 0. 51 inches x 25.4 = 12.95 mm
Forces
The speci?cations of the operating force for the switches are indicated
in hundredth Newton (cN). For the conversion please use the following
relation:
1 Newton (N) = 100 cN = 101.972 gf
1 cN = 1.01972 gf
Example: 250 cN x 1.01972 = 254.93 gf
The re-conversion corresponds to:
1 gf = 0.981 cN,
Example: 850 gf x 0.981 = 833.85 cN
Rest position
Operating point
Operating point
Reset point
Reset point
Movement
differential
Movement
differential
Final position
Pretravel
Free travel
Overtravel
Reset travel
Pretravel
Free travel
Overtravel
Reset travel
Total travel
Diagram showing relationship
between operating force and travel
Total travel
Diagram showing relationship
between contact force and travel
15
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