Motor Plate for High-Speed Wheel Printer
Original Publication Date: 1989-Jan-01
Included in the Prior Art Database: 2005-Jan-26
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.