Electrical pulse counters – pulse dividers – or shift registers: c – Applications – Position determining
Patent
1992-02-18
1994-07-19
Heyman, John S.
Electrical pulse counters, pulse dividers, or shift registers: c
Applications
Position determining
3461401, 400320, G06M 302
Patent
active
053316800
ABSTRACT:
A position detecting apparatus comprises a motion detecting section for generating a pulse when a carriage passes each of coordinate points set in a reciprocal movement span thereof at a predetermined pitch, and a counting section for storing position data representing an initial position of the carriage in advance, incrementing the position data in response to a pulse which is generated by the motion detecting section when the carriage is moved in the forward direction, and decrementing the position data in response to a pulse which is generated by the motion detecting section when the carriage is moved in the backward direction. Particularly, the position detecting apparatus further comprises a position data correcting section for controlling the counting section to correct the position data when the carriage is moved in the backward direction so that the position data represents a position shifted in the forward direction by a predetermined amount and to cancel the correction when the carriage is moved in the forward direction.
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Heyman John S.
Tokyo Electric Co. Ltd.
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