IAI America SSPDACR - Manual (Page 63)

10. Options
55
10 20 mm/s
10. Options
10.1 Brake
The brake is a mechanism to retain the slider of a vertically installed actuator so that the slider will not drop when
the power is cut off or servo turns off. If any axis is used vertically, an optional brake is required.
10.2 Creep Sensor
This sensor is used to perform home return at high speed. Normally home return is implemented with the slider
contacting the stopper at the stroke end on the motor side and then reversing its direction. To support this
“stopper method,” the home return speed is kept to a range of 10 to 20 mm/s. This means that sliders of long
strokes require a longer time to complete the home return. The creep sensor is a proximity sensor that allows the
slider to move at high speed until halfway and then reduce its speed to the normal home return speed before the
home, in order to shorten the time required for home return. The standard installation position of this sensor is on
the right side of the actuator as viewed from the motor, represented by the option model number “C.” A cover
similar to the one used for limit switches is provided on the outside of the sensor. If both the creep sensor and limit
switches are installed, the same cover is used for each. If you want to have the creep sensor on the left side,
specify the option model number “CL.” Check the figure of cover installation in 10.3, “Limit Switch.”
Home return of an axis with a long stroke requires a
longer time for the axis to move to the mechanical end.
Creep sensor
A sensor is provided before the mechanical end and once this sensor
actuates, the speed is reduced to perform normal home return operation.
Speed
High speed
With creep sensor
Without creep sensor
Creep sensor Mechanical
end
Distance