Single channel encoder system

Details Single channel encoder system Single channel encoder system

1987-07-23

1988-12-06

Hartary, Joseph W.

Recorders

Markers and/or driving means therefor

With ink supply to marker

250231SE, 318640, 400126, 400320, G01D 1524

Patent

active

047898747

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 velocity control, acceleration and deceleration zone limits, and a rest or parking position. The scale spans and parallels 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 characteristic in response to encoder sensing of the limit bands. The time varying output signals are employed as scale division count signals for position determination and as scale division count signals per unit of time, for velocity feedback. The signals of different characteristic produced upon entering and during crossing of the limit bands, are utilized in a system of logic for computing control system signals to compensate control uncertainties in differing functional modes of the control system.

REFERENCES:
patent: 4313684 (1982-02-01), Tazaki
patent: 4628609 (1986-12-01), Rieder
patent: 4709245 (1987-11-01), Piatt
Bishop et al; Carrier Reference Determination for Ink Jet Printers, IBM TDB, vol. 21, No. 12, May 1979, pp. 4928-4929.

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