Method of initializing pen recorder carriage position

Details Method of initializing pen recorder carriage position Method of initializing pen recorder carriage position

1983-05-05

1985-03-05

Goldberg, E. A.

Recorders

Markers and/or driving means therefor

Stylus feature

346 46, 346 11, G01D 900, G01D 936, G01D 1516

Patent

active

045034419

ABSTRACT:
A pen recorder has a carriage movable across a sheet of print paper and supporting a rotatable drum with a plurality of pen units mounted thereon. The carriage is movable between a pair of side frames through a print region and a nonprint region. When the carriage is moved by a stepper motor into abutment against one of the side frames which provides a stopper position, the relationship between the phase of the stepper motor and the position of the carriage is determined. Each time a print cycle is finished, the carriage is returned to a home position which is at the other end of the nonprinting region. A desired pen unit can be selected by reciprocating the carriage in an interval within the nonprint region, the interval being spaced from a preset number of increments of angular movement of the stepper motor.

REFERENCES:
patent: 4405931 (1983-09-01), Fujisawa

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