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R21-P Single Wheel Linear Measurement Encoder

 

Standard Features and Options:

  • Integrated mounting arm
  • Economical single measuring wheel
  • Unbreakable code disk
  • Various programmable features
  • Heavy duty bearings
  • USAMade in the USA

 

 

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R21-P

Product Description

The model R21 is an optical shaft encoder in a 2" diameter x 1-7/8" (Ø51mm x 48mm) housing with an integral mounting arm, compatible with a variety of mounting accessories for installation either above or below a moving web or conveyor. When used with the MW-8 (8.00" circumference) or MW-20 (20.00cm circumference) measuring wheel it can accurately track the web or conveyor to within ±.007" or ±.016cm per revolution. This is not a light duty encoder - it was built with heavy duty bearings and solid construction for reliable, long-term operation in continuous duty applications. During installation various features, such as the number of pulses per revolution, can be selected by setting configuration switches. The available features depend on the encoder model.

Call or visit our website for details about currently available programs, and to inquire about new features to meet your specific application needs.

Industry Use

Conveyor Manufacturers Printing and Labeling Custom Machine Builders Packaging
Material Handling      

Product Documentation

Additional Information

View FileDrawings

DOWNLOAD 3D
View File  STEP R21-P MW8
(not all 3D model variations available)

Supply Voltage Options
Output Circuits

Currently Available Programs

Program Description  
8EAJ
  • Output Type: single with Enhanced Anti-Jitter option
  • Output Circuits: 7272 push/pull, 7273 open collector, or 7272 differential line driver (the output circuit is pre-configured at the factory)
  • Selectable Output Pulses per linear movement when using MW-8 wheels:
    • Pulses per Foot: 1, 2, 3, 4, 6
    • Pulses per Inch: 1, 2, 3, 4, 5, 10, 16, 20
 View FileDatasheet
20EAJ
  • Output Type: single with Enhanced Anti-Jitter option
  • Output Circuits: 7272 push/pull, 7273 open collector, or 7272 differential line driver (the output circuit is pre-configured at the factory)
  • Selectable Output Pulses per linear movement when using MW-20 wheels:
    • Millimeters per Pulse: 1, 2, 3, 4, 5, 10, 15, 20, 25, 50, 75, 100
 View FileDatasheet
64AJ
  • Output Type: single with Anti-Jitter option
  • Output Circuits: push/pull, open collector, or differential line driver (pre-configured at the factory)
  • Selectable Counts per Revolution: 1 through 64
 View FileDatasheet
144AJ
  • Output Type: single with Anti-Jitter option, and direction
  • Output Circuits: push/pull, open collector, or differential line driver (pre-configured at the factory)
  • Selectable Counts per Revolution: 1, 2, 3, 4, 6, 8, 9, 12, 16, 18, 24, 36, 48, 72, 144
  • Short-Circuit and ESD protection
 View FileDatasheet

Modified Versions

Modification Description  
M265 R21 with shortened mounting handle View FileDatasheet

For our non-programmable single Wheel model, please see our R21 Wheel Encoder. For our dual Wheel models, please see our R22 Wheel Encoder and our RH Wheel Encoder.