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QR145  Download Spec Sheet

QR145

QR145

  • Overview
  • Specifications
  • Info & Pricing
Overview

About QR145

Quantum Devices, Inc. Model QD145 Optical Incremental Encoder provides an improved feedback solution in applications typically using modular encoders. With an over all height of just only 0.87” and the stability of a bearing encoder design, the model QD145 Optical Incremental Encoder can provide significant performance upgrades in applications limited by traditional modular encoder solutions. Outputs consist of a quadrature with reference pulse and three-phase commutation, which can be configured with either the industrial standard 5 volt RS422A Line Driver or the 5 to 26 volt OL7272 line driver. A flexible member allows for much greater tail shaft run out than can be tolerated by modular encoder designs, plus it provides 30 degrees of rotation for commutation timing. A housing constructed of conductive carbon fiber composite provides the EMI shielding of an all metal housing and the performance of a lightweight robust assembly.  Optional IP66 housing available at a fraction of the cost of competitors’ comparable sealed encoders.

Design Features:

  • 500 kHz Fundamental Frequency Response
  • Low Profile, 0.87″ assembled Height
  • Bearing Design Simplifies Encoder Attachment
  • Resolution up to 5000 Lines Per Revolution Direct Read
  • 4, 6 or 8 Pole Commutation
  • Conductive Carbon Fiber Housing
  • Standard 1.812″ Bolt Circle Mounting
  • Through Shaft Sizes up to 0.375″ Diameter
  • High Noise Immunity
  • Cost Competitive with Modular Encoders
  • Optional IP66 Housing
Specifications

QD145 Optical Encoder Electrical Specifications

Input Voltage 5 VDC +/- 5% or 5-26 VDC
Input Current Requirements 125mA Max. Plus interface loads
Input Ripple 2% Peak to Peak @ 5 VDC
Output Circuits AM26LS31 RS 422A Line Driver
OL7272 High Voltage Line Driver
TTL Output
Incremental Output Format Quadrature with A leading B for CW rotation with Index Pulse centered over A for 2500 line count and below. Index Pulse true over A and B High for 2500 line count and above
Frequency Response 500 kHz
Symmetry 180 Degrees +/- 10% typical
Minimum Edge Separation 54 Electrical degrees max
Commutation Format Three Phase 4, 6 or 8 Poles
Commutation Accuracy +/- 1° Mechanical

QD145 Optical Encoder Environmental Specifications

Storage Temperature -40 to 125°C
Operating Temperature -20 to 100°C Typical
-20 to 120°C Optional
Humidity 98% Non-Condensing
Vibration 20 g's @ 50 to 500 CPS
Shock 50 g's @ 11 mS Duration

QD145 Optical Encoder Mechanical Specifications

Maximum Shaft Speed 8000 RPM
Through Shaft Diameter 0.250", 0.3125", 0.375", 5mm, 6mm, 8mm, 10mm
(-0.0000, + 0.0005)
Radial Shaft Movement 0.007" TIR
Axial Shaft Movement +/- 0.030"
Housing Carbon Fiber Composite (case ground via cable)
Housing Volume Resistivity 10⁻² ohm-cm
Termination 15 Conductor Cable, 28 AWG 18" long, 9 conductor cable for non-commutated and TTL outputs
Mounting 1.812" Bolt Circle
Moment of Inertia 1.5x10⁻⁴ oz-in-S²
Acceleration 1x10⁵ Radians per Second²
Accuracy +/- 1.0 arc minute
Info & Pricing

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