Rotary encoder

Also known as quadrature encoder, quadratic encoder, absolute encoder, encoder. Category: Hardware

A rotary encoder is a sensor that measures the angular position of a shaft or plate. An incremental (quadrature) encoder counts pulses as the part turns, while an absolute encoder reports the position directly without a reference run.

How PhotoRobot uses it

On PhotoRobot glass-plate tables an encoder delivers roughly 40,000 pulses per rotation, evaluated 1000 times per second. This is what allows images to be captured at precise angles while the table keeps moving (Fast Spin). Absolute encoders determine the position of each machine axis without a calibration sensor.

See on photorobot.com

  • Control unit: The computer inside or beside every PhotoRobot that drives its motors, triggers cameras and connects it to the network.
  • Fast Spin: PhotoRobot capture mode that photographs during continuous turntable rotation instead of stopping at each angle.
  • Flash duration: How long a flash burst lasts; a very short flash freezes a moving subject sharply.

Where this term appears on photorobot.com

Mentioned on 5 pages of photorobot.com:

  1. PhotoRobot Control Units - Technical Documentation (Page)
    …32bit, 1GHz, 2000 MIPS Operating system Custom PhotoRobot OS Optical position sensor 1 Quadratic encoder 1 Absolute encoder (SLAVE module) N/A YES N/A Digital inputs 4 2 4 Digital outputs 2 Laser out…
  2. FOMEI Digital Pro X Studio Flash - PhotoRobot User Guide (Manual)
    Modeling Brightness Up/Down (Digital Encoder) Operation Instructions: Infographic 1.
  3. PhotoRobot CASE 850 Portable Studio User Guide (Manual)
    …holders Cross laser for precise product positioning Power and data cables Foldable legs Encoder & calibration probe Spare X-rings General purpose lugs to hold lights, light dividers, diffusion panels,…
  4. Mastering Product Photography: Shoes and Footwear (Blog)
    This, together with an encoder wheel which is capable of reading back the glass’ position for accurate and fast movement.
  5. PhotoRobot Case 850: The Highly Portable 360 Turntable (Video)
    This is made possible thanks to this encoder wheel, and this optical sensor with an auto-calibration function.

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