4B light duty polypropylene Rotech rotary shaft encoder is used
primarily for protecting equipment and personnel from dangerous
underspeed/belt slip conditions in extreme environments. Other
applications include accurate speed control, direction of rotation
detection, gate position indication and counting the number of
revolutions of the shaft.
An inductive sensing device in the body of the encoder detects a
steel rotor. On slow speed or accurate position control, a photo diode
detects the slots on a steel disk. One pulse is created for each rotor
or slot so the unit can be connected directly to a PLC/computer or 4B
The shaft to be monitored is drilled and taped to take the 1/2 in.
UNC Rotech Bolt. The unit is secured to the shaft with this bolt and is
able to move with the shaft. No guards are required as the rotating
components are encased inside the housing of the encoder. No brackets
are required as the encoder couples directly to the end of the shaft and
floats with the shaft.