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Print Carrier Crash Protection

IP.com Disclosure Number: IPCOM000087584D
Original Publication Date: 1977-Feb-01
Included in the Prior Art Database: 2005-Mar-03
Document File: 1 page(s) / 11K

Publishing Venue

IBM

Related People

Barrow, NF: AUTHOR [+3]

Abstract

It is common practice to control a serial printer from a computer. Furthermore, it is common for serial printers to include a carrier which moves back and forth in front of a platen. The carrier is usually either driven by a stepping motor or by a servo motor.

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Print Carrier Crash Protection

It is common practice to control a serial printer from a computer. Furthermore, it is common for serial printers to include a carrier which moves back and forth in front of a platen. The carrier is usually either driven by a stepping motor or by a servo motor.

If, due to some malfunction, the printer receives spurious signals from the computer, the motor driving the carrier can be given signals which cause the carrier to crash into the end plates of the printer.

It has been found desirable to place detectors at the end of the carrier traverse. Signals from these detectors override signals from the computer and stop the carrier. The detectors can be mechanical switches, photocells, Hall detectors, etc.

These detectors prevent the carrier from being driven too far in one direction.

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