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LP12 Optical Rotary Encoder

  • Overview
  • Specifications
  • Info & Pricing
Overview

About LP12 Optical Rotary Encoder

Quantum Devices, Inc’s Model LP12 optical encoder provides an improved feedback solution in applications typically using modular encoders. With an over all height of less than an inch and the stability of a bearing encoder design, the model LP12 can provide significant performance upgrades in applications limited by traditional modular encoder solutions. Outputs consist of a quadrature with index pulse (Incremental or Sinusoidal) 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 it provides 30 degrees of rotation for commutation timing.

LP12 Optical Encoder Design Features:

  • Low profile assembled height of 0.816″
  • Bearing design simplifies encoder attachment
  • Incremental resolutions up to 20,000 lines per revolution
  • SIN/COS outputs available up to 1250 PPR
  • Standard 4, 6 or 8-pole commutation
  • 1.280″, 1.575″, 1.812″ Bolt Circle Mounting
  • Through shaft sizes up to 0.3125″ (8 mm) diameter
  • High noise immunity
  • Cost competitive with modular encoders
  • 500 kHz frequency response
  • RoHS construction
Specifications

LP12 Incremental Electrical Specifications (A & B Output Options)

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

LP12 Sin/Cos Electrical Specifications (C & D Output Options)

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 C = sine/cosine 1 Vpp (measured differentially), index**,
UVW 26C31 line driver (RS-422 or single-ended TTL)
D = sine/cosine 1 Vpp (measured differentially), index**,
UVW open collector (no U’ V’ W’)
Incremental Output Format Quadrature sine/cosine with sine leading cosine for CW rotation. Ungated index pulse.
Max Operating Frequency 500 kHz
Sine/Cosine Amplitude 1 Vpp ± 5% (measured differentially)
Index Amplitude ** C = 1 Vpp ± 5% (measured differentially) square wave
D = 1 Vpp ± 5% (measured differentially) sinusoidal
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

LP12 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

LP12 Mechanical Specifications

Bore Diameter (Tolerance) 0.125", 0.1875", 0.250", 0.3125", 3 mm, 4 mm, 5 mm, 6 mm, 8 mm (+0.0006/-0.0000")
Recommended Shaft Engagement 0.750” minimum
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 1.280”, 1.575”, 1.812” Bolt Circle
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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