Device for controlling the carriage movement in a printer

Details Device for controlling the carriage movement in a printer Device for controlling the carriage movement in a printer

1979-09-19

1982-06-01

Wright, Jr., Ernest T.

Typewriting machines

Carriage or carriage-moving or movement-regulating mechanism

Carriage-feed mechanism

400322, 4007051, 318571, 318653, B41J 1900

Patent

active

043324924

ABSTRACT:
In a printer comprising a printing head, which is supported by a carriage, the carriage position along a record carrier is sensed at two occasions. A cooperating micro processor calculates an actual carriage speed on the basis of the position values which are obtained. The actual carriage speed and an optimal carriage speed, which is stored, are compared and on the basis of this comparison a compensation factor is calculated for a reference signal (Ref) which determines the carriage speed. This compensation factor is checked at each carriage movement by measuring the carriage speed. Accordingly a permanently optimal carriage speed is secured and the need of an accurate trimming of the carriage speed is eliminated during manufacture as well as at later service periods.

REFERENCES:
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IBM Technical Disclosure Bulletin, "Speed Regulation for Brushless DC Motors", Keidl, vol. 19, No. 10, Mar. 1977, pp. 3831-3832.

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