Browse Prior Art Database

Torque-Test Print Wheel Tool

IP.com Disclosure Number: IPCOM000040236D
Original Publication Date: 1987-Oct-01
Included in the Prior Art Database: 2005-Feb-02
Document File: 2 page(s) / 59K

Publishing Venue

IBM

Related People

Ashcroft, G: AUTHOR [+4]

Abstract

A technique is described whereby a tool provides a torque-testing procedure for print wheels, as used in daisy wheel printers and typewriters, which cannot be obtained during normal machine testing in the printer. The tool provides torque testing, which in turn determines the correct number of leaf springs, the correct lubrication, and the correct rotational force requirements of the wheel. (Image Omitted) The torque test print wheel tool consists of inductive torque transducer 10, multi-motion activator 11, instrument panel 12, main frame assembly 13, and guide rods 14 to position carriage 15.

This text was extracted from a PDF file.
At least one non-text object (such as an image or picture) has been suppressed.
This is the abbreviated version, containing approximately 70% of the total text.

Page 1 of 2

Torque-Test Print Wheel Tool

A technique is described whereby a tool provides a torque-testing procedure for print wheels, as used in daisy wheel printers and typewriters, which cannot be obtained during normal machine testing in the printer. The tool provides torque testing, which in turn determines the correct number of leaf springs, the correct lubrication, and the correct rotational force requirements of the wheel.

(Image Omitted)

The torque test print wheel tool consists of inductive torque transducer 10, multi- motion activator 11, instrument panel 12, main frame assembly 13, and guide rods 14 to position carriage 15. Also included is reference fixture 16 mounted to an index conveyor (not shown), adjustable stop 17 used to set the depth while depressing the print wheel in simulating actual printer operation, and drive tool 18 used to position the wheel for testing. For reference, the print wheel assembly, as shown in Fig. 2, consists of cartridge top 19, leaf spring 20, dampening ring 21, daisy wheel 22 and cartridge bottom 23. After the print wheel assembly is positioned by reference fixture 16, a vertical cylinder in multi-motion activator 11 is extended. Drive tool 18 makes contact with the wheel and depresses it until stop 17 bottoms onto frame 13. The wheel is rotated back and forth 360o in each direction through multi-motion activator 11. Torque is measured by means of a load cell so as to indicate if the proper number of leaf springs 20 are installed...