POSITION DETECTING APPARATUS

A position detecting apparatus comprises a motion detecting section (1, 3) for generating a pulse when a carriage (CA) passes each of coordinate points set in a reciprocal movement span thereof at a predetermined pitch, and a counting section (5) for storing position data representing an initial pos...

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Bibliographische Detailangaben
1. Verfasser:	UENO, SHIGENORI
Format:	Patent
Sprache:	eng
Schlagworte:	ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVEREDIN A SINGLE OTHER SUBCLASS CORRECTION OF TYPOGRAPHICAL ERRORS i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME LINING MACHINES MEASURING MEASURING ANGLES MEASURING AREAS MEASURING IRREGULARITIES OF SURFACES OR CONTOURS MEASURING LENGTH, THICKNESS OR SIMILAR LINEARDIMENSIONS MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR PERFORMING OPERATIONS PHYSICS PRINTING SELECTIVE PRINTING MECHANISMS STAMPS TARIFF METERING APPARATUS TESTING TRANSPORTING TYPEWRITERS
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Beschreibung
Zusammenfassung:	A position detecting apparatus comprises a motion detecting section (1, 3) for generating a pulse when a carriage (CA) passes each of coordinate points set in a reciprocal movement span thereof at a predetermined pitch, and a counting section (5) for storing position data representing an initial position of the carriage (CA) in advance, incrementing the position data in response to a pulse which is generated by the motion detecting section (1, 3) when the carriage (CA) is moved in the forward direction, and decrementing the position data in response to a pulse which is generated by the motion detecting section (1, 3) when the carriage (CA) is moved in the backward direction. Particularly, the position detecting apparatus further comprises a position data correcting section (2, 4) for controlling the counting section (5) to correct the position data when the carriage (CA) 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 (CA) is moved in the forward direction.