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Browse Prior Art Database

Total Conjugate Length Adjustment Assembly

IP.com Disclosure Number: IPCOM000034225D
Original Publication Date: 1989-Jan-01
Included in the Prior Art Database: 2005-Jan-27
Document File: 2 page(s) / 44K

Publishing Venue

IBM

Related People

Jones, RO: AUTHOR [+2]

Abstract

This article addresses a unique way to obtain the needed total conjugate length (TCL) adjustment versus magnification for a scan carriage drive attached to both ends of the scanning mirror carriages used in copier/printers. Assembly 10 consists of one piece unitized shoe 11 which is fastened to two commercial precision ball slides 12 which are secured to the optics framework. At the center of shoe 11 are a pair of slots (zone 13) which are perpendicular to the axis of motion. The slots are aligned to each other in the vertical axis. One of the slots is open at one end, to facilitate ease of assembly and disassembly. Gimballing nut 14 fitted with pins which fit into the slots is free to translate perpendicular to the axis of motion, in both the vertical and horizontal directions.

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Total Conjugate Length Adjustment Assembly

This article addresses a unique way to obtain the needed total conjugate length (TCL) adjustment versus magnification for a scan carriage drive attached to both ends of the scanning mirror carriages used in copier/printers. Assembly 10 consists of one piece unitized shoe 11 which is fastened to two commercial precision ball slides 12 which are secured to the optics framework. At the center of shoe 11 are a pair of slots (zone 13) which are perpendicular to the axis of motion. The slots are aligned to each other in the vertical axis. One of the slots is open at one end, to facilitate ease of assembly and disassembly. Gimballing nut 14 fitted with pins which fit into the slots is free to translate perpendicular to the axis of motion, in both the vertical and horizontal directions. This compensates for any misalignment and prevents binding of the nut 14 on lead screw 15 during TCL adjustment. Compression spring 16 is used to self-align gimballing nut 14 and prevent rotation of the nut during rotation of the lead screw. Lead screw 15 is employed to drive the TCL assembly through the nut 14 along the axis of motion. Lead screw 15 is turned by a stepper motor (not shown) for position control. Lead screw 15 is bearing supported. A bearing molded in plastic bearing block 17 is press fit onto lead screw 15 at one end. A bearing molded in plastic bearing block 18 installs with a slip fit to the lead screw at the other end and is retained in the axial direction by bowed E-type retaining clip 19. Once installed, clip 18 creates a spring load between lead screw 15 and the bearing 18 inner r...