SMC Networks C(D)RB1 50F Series Operation Manual page 8

Precautions when using external stoppers
Be sure to install external stoppers in the proper places. Installation in the wrong place can result in
equipment breakage, which could damage other equipment or cause human injury.
Correct position
Install the stopper at a sufficient
distance from the rotating shaft.
Install external stoppers within the range of the rotating angle. Installing an external stopper at the
maximum rotation angle may result in an inability to fully absorb the kinetic energy generated, and
damage to equipment may occur.
Precautions when Converting Rotational Motion to Linear Motion
When using a link mechanism, etc., to convert rotational motion to linear motion, and determining the
operation end using the stopper on the linear motion end (see below), a small value for θ at the operation
end may result in the torque of the rotary actuator causing excessive radial load to act on the output axle,
and equipment breakage may occur.
Install a stopper on the rotation motion side, or increase the value of θ at the operation end, to make sure
the load generated does not exceed the allowable value for the product.
(12) Do not use springs, etc., to add force in the rotational movement direction.
When rotational force from an external spring, etc., acts and generates negative pressure on the
product's interior, breakage of the internal seal or acceleration of abrasion may occur.
Incorrect position
The external stopper becomes a
fulcrum, resulting in the load's
inertia force being applied to the
table as a being moment.
Rotary actuator
7
Incorrect position
If an external stopper is installed
on the opposite side of the load,
the inertia force generated by
the load is applied directly to the
table.
Stopper