Single channel encoder system

Details Single channel encoder system Single channel encoder system

B - Operations, Transporting

41

J

341/97, 342/29.1

B41J 19/18 (2006.01) B41J 19/20 (2006.01) G01D 5/245 (2006.01) G05B 19/23 (2006.01) G06K 15/22 (2006.01)

Patent

CA 1314605

Abstract A control system providing a control of position, velocity, and direction of movement of a member in an axis of freedom which employs a scale having scale divisions thereon and bands or zones defining limits of constant vel- ocity control, acceleration and deceleration zone limits, and a rest or parking position. The scale spans and paral- lels the axis of freedom. A single channel transducer or encoder mounted on and moving with the member produces time varying output signals in response to the sensing of scale divisions along the scale and signals of different charac- teristic in response to encoder sensing of the limit bands. The time varying output signals are employed as scale divi- sion count signals for position determination and as scale division count signals per unit of time, for velocity feed- back. The signals of different characteristic produced upon entering and during crossing of the limit bands, are util- ized in a system of logic for computing control system signals to compensate control uncertainties in differing functional modes of the control system.

572875

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