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QM22 Optical Rotary Encoder

  • Overview
  • Specifications
  • Info & Pricing

About QM22 Optical Rotary Encoder

Quantum Devices Model QM22 optical rotary encoder is a high performance, small diameter modular encoder ideal for high volume OEM applications and priced competitively for all sizes of motion control projects. The QM22’s versatile electrical configurations include lines counts up to 2500* and several commutation options*. Patented lock-n-twist mechanism simplifies installation; saving production time and money. Perfect for NEMA 11 BLDC servo applications. Use QM22 with our QC201 Commutation Indicator for fast, accurate motor encoder alignment.

* Contact Quantum Devices for custom configurations (e.g. resolution, commutation, etc.)

Design Features:

  • Bearingless modular design
  • 4, 6 or 8 pole commutation*
  • Resolutions to 2500*
  • Miniature package size
  • Easy lock-n-twist assembly feature
  • RoHS construction
  • Hermetically sealed LED
  • High noise immunity

Electrical Specifications

Input Voltage 5 VDC ± 5%
Input Current Requirements 35 mA typical, 50 mA max plus interface loads
Input Ripple 2% peak to peak @ 5 VDC
Incremental Output Circuits (ABZ) 26C31 line driver (RS-422 or single-ended TTL) sink or source 20 mA max
Commutation Output Circuits (UVW) B = open collector 4 mA sink max, pull up voltage 30 VDC max
C = open collector with 2 kΩ pull-ups, 4 mA sink max
Incremental Output Format Quadrature with A leading B for CCW rotation viewed from
encoder top
Max Operating Frequency 500 kHz or 15,000 RPM
Commutation Format Three phase 4, 6, 8 or 10 poles (other pole counts upon request)
Commutation Accuracy (UVW) ± 2° mechanical
Interpolation Factors 500/512 PPR = 2x, 1000/1024 PPR = 4x
2000/2048 PPR = 8x, 2500 PPR = 10x

Environmental Specifications

Storage Temperature -40 to 125°C
Operating Temperature -30 to 115°C
IP Rating IP40
Humidity 90% non-condensing
Vibration 20 g's @ 25 to 2,000 Hz
Shock 100 g's @ 6 ms duration

Mechanical Specifications

Bore Minimum Diameter Bore Size +0.0002”
Recommended Shaft Tolerance +0.0000”/-0.0005”
Minimum Shaft Engagement 0.490” [12.5 mm]
Allowable Shaft Runout 0.002" [0.05 mm] TIR (±0.001" shaft radial play from initial shaft position of assembled encoder)
Allowable Axial Shaft Movement ± 0.010" [± 0.25 mm]
Mounting 1.024” [26 mm] bolt circle
Dynamic Commutation Adjustment Range 26° mechanical
Moment of Inertia 4.0 x 10⁻⁶ oz·in·s²
Info & Pricing

More Information & Pricing

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

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