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  • Specifications
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About QM35 EZ-COMM

The Quantum Devices EZ-Comm system is the fastest and most economical way to align an optical encoder’s commutation channels to a motor. EZ-Comm was designed to reduce assembly cost for high volume manufacturing. By eliminating multiple steps from the typical timing of an encoder and motor, EZ-Comm saves manufacturing time and reduces assembly cost. EZ-Comm is integrated into the high performance, low profile modular design of the QM35.  QM35 EZ-Comm is ideal for high volume OEM applications and priced competitively for all sizes of motion control projects. As simple as a push of a button, EZ-Comm is the newest and simplest way to commutate your BLDC motors.

Design Features:

  • Bearingless modular design
  • Low profile assembled height
  • Resolutions up to 5000 lines per revolution
  • 4, 6, 8 or 10 pole commutation
  • Easy lock-n-twist assembly feature
  • Through shaft sizes up to 0.375″ diameter
  • Up to 1Mhz frequency response
  • High noise immunity
  • RoHS construction
  • Hub to shaft uses two 3-48 set screws
  • Hermetically sealed LED
  • Multiple mounting options including resolver size 15

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 26C31 RS 422A line driver (TTL compatible)
Optional UVW open collector (No U’ V’ W’)
Incremental Output Format Quadrature A leading B for CCW rotation viewed from encoder top.
Max Operating Frequency < 5000PPR = 500Khz or 15,000RPM
5000PPR – 7999PPR = 675Khz
≥ 8000PPR = 1.0Mhz
1000LC-10P, 1024LC-10P, 2000LC-10P, 2048-10P and 2048LC-14P = 7,000RPM
Commutation Format Three phase 4, 6, 8 or 10 poles
Commutation Accuracy (U-V-W) See Specification Sheet
Interpolation Factors 1000/1024PPR = 2x, 2000/2048PPR = 4x
2500PPR = 5x, 4000/4096PPR = 8x
5000/5120PPR = 10x, 8000/8192PPR = 16x

Environmental Specifications

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

Mechanical Specification

Hub Minimum Diameter Hub size +0.0002"
Recommended Shaft Tolerance -0.0005, + 0.0000"
Minimum Shaft Engagement .400" [10.2mm]
Allowable Shaft Run Out 0.05mm, 0.002" TIR [+/- .0010" shaft radial play from initial shaft position of assembled encoder]
Allowable Axial Shaft Movement ± 0.25mm, ± 0.010"
Mounting 1.28", 1.812" bolt circle, resolver mount
Dynamic Commutation Adjustment Range 30° mechanical
Moment of Inertia 8.0 x 10⁻⁶ oz-in-S²
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