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JR12 Optical Rotary Encoder

  • Overview
  • Specifications
  • Info & Pricing

About JR12 Optical Rotary Encoder

Quantum Devices, Inc. Model JR12 Optical Rotary Encoder provides an improved feedback solution in applications typically using pancake resolvers with same threaded shaft and jam nut mounting. With an overall height of less than one inch and the stability of a bearing encoder design, the model JR12 can provide significant performance upgrades in applications limited by traditional resolvers or modular encoder solutions. Output options consist of a quadrature with index pulse and three-phase commutation. A flexible member allows for much greater tail shaft run out and TIR than can be tolerated by modular encoder designs, plus the mounting flange eliminates the need for expensive servo mounting clips.

Design Features:

  • Replaces size 15 pancake resolver
  • Bearing design simplifies encoder attachment
  • Resolutions up to 20,000 lines per revolution
  • 4, 6 or 8 pole commutation
  • Eliminates expensive mounting servo clamps
  • Accommodates resolver type ¼” threaded shafts
  • High noise immunity
  • Cost competitive with modular encoders
  • 500 kHz frequency response
  • RoHS construction

JR12 Electrical Specifications

Input Voltage 5 VDC ± 5%
Input Current Requirements 65 mA typical, 100 mA max plus interface loads
Input Ripple 2% peak to peak @ 5 VDC
Output Circuits A = 26C31 line driver (RS-422 or single-ended TTL)
B = ABZ 26C31 line driver, UVW open collector (no U’ V’ W’)
Incremental Output Format Quadrature with A leading B for CW rotation
Index pulse true over A and B high
Max Operating Frequency 500 kHz
Symmetry 180° electrical ± 10% typical
Minimum Edge Separation <4000 PPR = 54° electrical
≥4000 PPR = 45° electrical
Commutation Format Three phase 4, 6 or 8 poles (other pole counts upon request)
Commutation Accuracy ± 1° mechanical
Z Channel to U Channel ± 1° mechanical

JR12 Environmental Specifications

Storage Temperature -40 to 125°C
Operating Temperature -20 to 115°C
IP Rating IP40
Humidity 90% non-condensing
Vibration 20 g's @ 50 to 500 CPS
Shock 50 g's @ 11 ms duration

JR12 Mechanical Specifications

Bore Diameter (Tolerance) 0.250" (+0.0010/-0.0000")
Allowable Shaft Runout 0.007" TIR
Axial Shaft Movement ± 0.030"
Maximum Shaft Speed 8000 RPM
Interface Connector Connector: JAE P/N FI-W15P-HFE
Mounting Size 15 pancake resolver
Moment of Inertia 9.1 x 10⁻⁵ oz·in·s²
Acceleration 1x10⁵ radians/s²
Accuracy Instrument error 1.5 arc minutes max
Info & Pricing

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Consult factory for configurations not shown (e.g. resolution, commutation, etc.).

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