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  • Overview
  • Specifications
  • Info & Pricing

About JR12

Quantum Devices, Inc. Model JR12 provides an improved feedback solution in applications typically using pancake resolvers with same threaded shaft and jam nut mounting. With an over all 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

Electrical Specifications

Input Voltage 5 VDC ± 5%
Input Current Requirements 65mA Typ., 100mA Max Plus Interface Loads
Input Ripple 2% Peak to Peak @ 5 VDC
Output Circuits (A) 26C31 RS 422A Line Driver (TTL Compatible)
(B) ABZ 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.
Frequency Response 500 kHz
Symmetry 180 Degrees ± 10% Typical
Minimum Edge Separation < 4000PPR = 54 electrical degrees
≥ 4000PPR = 45 electrical degrees
Commutation Format Three Phase 4, 6 or 8 poles
Commutation Accuracy ± 1° mechanical
Z channel to U channel ± 1° mechanical

Environmental Specifications

Storage Temperature -40 to 125° C
Operating Temperature -20 to 115° C
IP Rating 40
Humidity 90% Non-Condensing
Vibration 20 g's @ 50 to 500 CPS
Shock 50 g's @ 11mS Duration

Mechanical Specification

Through Shaft Diameter 0.250" Tolerance: -0.0000, + 0.0010"
Radial Shaft Movement 0.007" TIR
Axial Shaft Movement ± 0.030"
Maximum Shaft Speed 8000 RPM, Contact Customer Service for Higher RPM
Interface Connector Connector: JAE P/N F1-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 min. max
Info & Pricing

More Information & Pricing

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

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