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Motor Plate for High-Speed Wheel Printer

IP.com Disclosure Number: IPCOM000034163D
Original Publication Date: 1989-Jan-01
Included in the Prior Art Database: 2005-Jan-26
Document File: 2 page(s) / 49K

Publishing Venue

IBM

Related People

Curry, SA: AUTHOR [+3]

Abstract

A high-speed wheel printer has its missile hammer accurately located relative to its preferred print point on a platen by controlling manufacturing tolerances of its motor plate. A motor plate 1 is cast with a missile hammer surface 2 as an integral part thereof. The motor plate 1 is machined so that all critical dimensions, which influence the physical location of a missile hammer 3 mounted on the motor plate 1, are machined with one fixturing operation. This avoids tolerance stack ups due to various machining operations that usually require different fixtures. The missile hammer 3 is a solenoid including a housing 4 having cylindrical portions of different diameters and an armature 5. Largest portion 5' of the housing 4 abuts the machined missile hammer surface 2 of the mounting plate 1.

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Motor Plate for High-Speed Wheel Printer

A high-speed wheel printer has its missile hammer accurately located relative to its preferred print point on a platen by controlling manufacturing tolerances of its motor plate. A motor plate 1 is cast with a missile hammer surface 2 as an integral part thereof. The motor plate 1 is machined so that all critical dimensions, which influence the physical location of a missile hammer 3 mounted on the motor plate 1, are machined with one fixturing operation. This avoids tolerance stack ups due to various machining operations that usually require different fixtures. The missile hammer 3 is a solenoid including a housing 4 having cylindrical portions of different diameters and an armature 5. Largest portion 5' of the housing 4 abuts the machined missile hammer surface 2 of the mounting plate 1. Screws extend through the motor plate 1 and into a portion 6 of the housing 4; the portion 6 is the smallest diameter of the housing 4, which has an intermediate portion 6'. A plastic cover 7 overlies most of the missile hammer 3 and is secured to the motor plate 1 by screws. The motor plate 1 is secured to the printer through mounting means extending through openings 8 in lugs 9 on opposite sides of the motor plate. The openings 8 are aligned horizontally and provide a horizontal reference axis. The missile hammer 3 has the armature 5 aligned perpendicular to this horizontal reference axis, which extends through the openings 8 in the lu...