Detail P+ F Encoders Pepperl+ Fuchs
1. Incremental rotary encoders
supply a certain number of pulses for each shaft revolution. Speed is measured by counting the pulses for a period of time. To calculate angle or the distance covered, pulses are counted starting from a reference point.
Dual channel quadrature output encoders feature two signal outputs that are 900 out of phase with each other. This permits the controller to determine direction of rotation and perform bi-directional positioning tasks.
In addition, three-channel incremental encoders have a third signal channel ( known as “ zero” , or reference, signal) that provides a single pulse for each revolution.
2. Absolute rotary encoders:
a. Single-Turn Absolute Rotary Encoders
b . Multi-Turn Absolute Rotary Encoders:
provide a distinctly coded numerical value for each shaft position. In positioning tasks in particular, the absolute encoders relieve the controller of computation tasks and keep costs down by eliminating the need for additional input components.
Moreover, reference runs when the machine is switched on or after power failures are no longer required as the current position value is available immediately. Parallel absolute encoders transmit the position value to the analyzing electronics through several parallel cables. Serial absolute encoders transmit their output data via standardized interfaces and protocols.
In the past, point-to-point connections were frequently set up for serial data transmission but today fieldbus systems are being used more often.
The Pepperl+ Fuchs rotary encoder portfolio includes the most varied range of current interfaces for absolute encoders to be found on the market.
Tampilkan Lebih Banyak