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Browse Prior Art Database

Conveyorized Module Handler

IP.com Disclosure Number: IPCOM000034244D
Original Publication Date: 1989-Jan-01
Included in the Prior Art Database: 2005-Jan-27
Document File: 2 page(s) / 40K

Publishing Venue

IBM

Related People

Kohler, H: AUTHOR [+2]

Abstract

An endless conveyor belt, equipped with module carriers combined with two stepper motors M1 and M2, a differential gear and four deflection rollers D1 to D4, permits testing four memory modules in a single cycle, while depositing four different sorts of modules. In other words, it permits performing four different steps without any motion occurring at the test station. The conveyor belt, equipped with module carriers, is loaded with memory modules at the loading station. The step width corresponds to the position of the carriers on the belt. Movement is controlled by optical sensors. The step width during loading is identical for motors M1 and M2. The differential gear does not change its position.

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Conveyorized Module Handler

An endless conveyor belt, equipped with module carriers combined with two stepper motors M1 and M2, a differential gear and four deflection rollers D1 to D4, permits testing four memory modules in a single cycle, while depositing four different sorts of modules. In other words, it permits performing four different steps without any motion occurring at the test station. The conveyor belt, equipped with module carriers, is loaded with memory modules at the loading station. The step width corresponds to the position of the carriers on the belt. Movement is controlled by optical sensors. The step width during loading is identical for motors M1 and M2. The differential gear does not change its position. As soon as four carriers with modules reach the multiple test head, motor M1 performs a quadruple step, whose magnitude is four times that performed by motor M2. Thus, the long test period can be used to load and unload modules, which allows multi-sorting. After M1 has completed one quadruple step, M2 moves four single steps. The differences in the two step movements are compensated for by a lateral movement of the differential gear. A quadruple step of M1 causes the differential gear to move to the left position LP. Then, the four loaded modules are tested. M1 blocks the respective part of the belt, preventing it from moving until completion of testing. During the same interval, M2 performs four single steps, causing the differential gear t...