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The Hockey Puck Encoder

General Information
The Hockey Puck is a revolutionary new rotary encoder that is non-contact to the measuring surface and compensates for mechanical misalignment. It has no shaft or bearings so the problems of drag, endplay, corrosion, side loading, and push-out have been eliminated. The user mounts a magnet on the rotating object and locates the encoder close by. Precise mounting is not required, as it will tolerate changes in distance, centering and planer tilt. This is important as the machine wears over time. Non-contact means vibration and shock from the mechanics are not transmitted directly to the electronics in the encoder. Our advanced design provides a wide range of operating voltages, temperatures, and resolutions. Built-in over-voltage, mis-wire and spike protection keep this encoder running.
A Designer Kit is available for you to experience the possibilities for yourself.

Downloads
Data Sheet for 58mm Hockey Puck Encoder
Non-Contact Encoder Configuration Guide (18mm, 30mm and 58mm)
30mm Encoder Data Sheet
18mm Encoder Data Sheet

Watch short Video (640x480) Watch short Video (320x240)

The Hockey Puck is a non-contact angular sensor package
 

Sensing Envelope
The Hockey Puck has the ability to sense the rotational position of a magnet in a variety of ways. The figures below show potential magnet placement areas (envelopes) using the center or the outside of the encoder. Of course, other positions or angles can be used. Also noteworthy is that strong external magnetic fields may adversely affect performance.

    
 
Center Envelope
The magnet is mounted to the center of the gear and the center of the Hockey Puck is located in the front of the gear.

The Hockey Puck has a sensing envelope referenced from the center

Locate the magnet within the sensing envelope

  
  Adjacent Envelope
The rotating shaft is slipped through a ring magnet. The ring magnet can be sensed by the Hockey Puck from the side. Please note that when sensing from the side slight non-linearity exists depending on the ring magnet selected.

The Hockey Puck has a sensing envelope adjacent to the device

Locate the magnet within the sensing envelope

  
 
Specifications        
  Mechanical
Enclosure: 58mm diameter delron
Mounting: Servo ring / 3 through mounting holes
Weight / Height: 2oz / 25mm
Maximum RPM: 3000 PRM		 Electrical
Supply Voltage: 6 to 30 VDC, 60mA
Output Format: Incremental quadrature (Ch A and Ch B, with optional Marker)
Output Resolution: 10 to 2048 quadrature pulses per revolution (13 bit)
Output Driver: Push/Pull (OLP7272)
Protection: reverse polarity, spike, noise, open circuit, short circuit
Electrical Connections: 5 wire plug-able terminal strip (see Table)
LED Indicators: Power, Channel and Marker
 		 Environmental
Temperature: -25 to +70 degrees C
Humidity: 100% relative humidity
Potting Compound: Non-porus, water and chemical resistant, RoHS compliant
Shock & Vibration: Meets MIL-STD-202 Specs (information available on web site) Shock—half sine, 50g, 11ms Thermal Shock— -40 to + 125 one hour dwell Vibration—10 to 500 hz at 10g
Enclosure Rating: IP65, 67 or 68 (depending on connection style)		  
 
Output

Standard Resolutions

Output Waveform

Standard Connector

  
  Consult the factory for any other resolutions. The resolution specifies the number of pulses per revolution per channel (CH A and CH B).
Decimal: 10, 20, 25, 40, 50, 80, 100, 125, 200, 250, 400, 500

Binary: 8, 16, 32, 64, 128, 256, 512, 1024, 2048		 Encoders come standard with 5 pin connector with M2 locking screws capable of terminating a 16 to 28 gauge wire. Connector simply plugs in for easy installation.
  Pin 1 : +V (6 to 36 VDC)
  Pin 2: Gnd
  Pin 3: Channel A output
  Pin 4: Channel B output
  Pin 5: Marker pulse M
 		  
 
Mechanical Details

58 mm Diameter Encoder

 
 
Magnets
The magnet plays an important role in the overall measurement. Joral offers magnets of many shapes and sizes, depending on the application. Typical magnets would be of the disk or ring shape in the 4 to 20mm diameter range. A small disk magnet could be mounted on the end of a shaft. A ring magnet could be slid through a shaft. A bar magnet could be rotated or moved linearly. Joral offers a Designer Kit containing an encoder and an assortment of magnets. Consult the factory for additional information.		    
 
Options
The Hockey Puck comes standard in 30, 40, 50 and 58mm diameter packages in the standard resolutions with the push/pull quadrature output. Customizations are available with the connector, the resolution, absolute position output, color, labeling, power supply voltage, and other electrical or mechanical modifications. Please contact the factory to discuss your application requirements.		    
         
         

Joral  LLC    |  5050 S. Towne Dr.   |   New Berlin, Wi 53151   |   262-522-3266