Method for sensing carriage position separation and compensating

Details Method for sensing carriage position separation and compensating Method for sensing carriage position separation and compensating

1996-12-10

2000-01-18

Le, N.

Incremental printing of symbolic information

Ink jet

Ejector mechanism

B41J 2300

Patent

active

060152044

ABSTRACT:
A method for sensing separation of a carriage from a home position and compensating the home position by using a program stored at a microprocessor of an ink jet printer includes a home position separation sensing process which has the steps of: checking whether or not the ink jet printer is in a stop state and the carriage is placed at the home position; checking whether or not the carriage placed at the home position is separated from the position by sensing the state change of a photo sensor; and setting a flag according to the state change of the photo sensor, and a home position separation state compensating process which has the steps of: checking whether or not a flag has been set; if it is checked that the flag has been set, counting time to maintain the present state for a predetermined time; resetting the home position if the counted time exceeds the predetermined time; checking whether or not an ink cartridge is attached to the carriage; if it is checked that the ink cartridge is attached to the carriage, compensating the position of the carriage tocorresponds to the reset home position; and after completion of the compensating step, clearing all related flags.

REFERENCES:
patent: 4785312 (1988-11-01), Toyomura
patent: 5605407 (1997-02-01), Hama et al.
patent: 5617122 (1997-04-01), Numata et al.
patent: 5701145 (1997-12-01), Ninomiya
patent: 5825381 (1998-10-01), Choo

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