Browse Prior Art Database

Autoscan Light Fixture

IP.com Disclosure Number: IPCOM000047166D
Original Publication Date: 1983-Oct-01
Included in the Prior Art Database: 2005-Feb-07
Document File: 2 page(s) / 73K

Publishing Venue

IBM

Related People

Berner, DM: AUTHOR [+4]

Abstract

Light levels internal to a machine are automatically tested by a fixture implantable within the machine and including a drive arrangement for selectively positioning photodetectors relative to the machine internal light sources. The device is particularly useful for testing copiers by replacing the photoconductive drum with the fixture. Fixture 10 provides automated illumination measurements in response to remote indexing to various light sources in a dynamic mode and internal to a copier. Fixture 10 is contained within a drum 11 arranged to replace the photoconductor drum of the copier. Photodetector measuring head 12 provides input data for the unit and is completely contained within drum 11.

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Autoscan Light Fixture

Light levels internal to a machine are automatically tested by a fixture implantable within the machine and including a drive arrangement for selectively positioning photodetectors relative to the machine internal light sources. The device is particularly useful for testing copiers by replacing the photoconductive drum with the fixture. Fixture 10 provides automated illumination measurements in response to remote indexing to various light sources in a dynamic mode and internal to a copier. Fixture 10 is contained within a drum 11 arranged to replace the photoconductor drum of the copier. Photodetector measuring head 12 provides input data for the unit and is completely contained within drum 11. Drum 11 is supported in ball bearings at ends 15 and 16 with output cables (not shown) connected to a control and data acquisition unit (not shown) by passing through opening 18 of hub 19. Front bearing 17 is anchored in a spider plate 20 which mounts to the copier frame 22 by reference-establishing screws, such as 23 and 24. This enables the running of the copier without adversely affecting the orientation of drum 11 in the dynamic test mode. Drum 11 is initially positioned to present photodetector 12 to the light source of the copier, such as the document lamp, erase lamp, clean lamp, or the like. Stepping motor 25 is connected to carriage assembly 26 by means of closed-loop belt 28 so that assembly 26 is positionable along guide rods 29A and 29B in a direction parallel to the axis of drum 11. A second stepper motor 30 is coupled by a gear train so that the drum is rotationally positionable in any position, such as the home position, from which a sequence of automated...