Semiconductor fabricating apparatus with remote belt tension sen

Details Semiconductor fabricating apparatus with remote belt tension sen Semiconductor fabricating apparatus with remote belt tension sen

1996-12-26

1998-10-06

Schoeppel, Roger J.

Endless belt power transmission systems or components

Means for adjusting belt tension or for shifting belt,...

474102, F16H 722

Patent

active

058169709

ABSTRACT:
The present invention relates to a semiconductor fabricating apparatus having an electrical system for transmitting a rotatory power through a belt of a motor to a pulley. The semiconductor fabricating apparatus having an electrical system of the present invention includes a sensor disposed in the vicinity of the belt for detecting a distance between the sensor and the belt and generating an electrical signal corresponding to a detected distance; an amplifier for amplifying the electrical signal to generate an amplified voltage; an analog-to-digital converter for converting the amplified voltage into a digital signal; and a controller for comparing the digital signal with a reference signal and determining whether the belt is loose on the pulley so as to generate a control signal. When the belt deviates out of the pulleys during the process, the loose belt makes the pulleys run idle, the belt cuts off, or the rotation of the motor stops, the present invention helps an operator recognize such an unexpected abrupt situation and take an appropriate action to solve the above problems at once.

REFERENCES:
patent: 4088036 (1978-05-01), Hillman
patent: 4117718 (1978-10-01), Hayward
patent: 4174641 (1979-11-01), Hillman
patent: 4558660 (1985-12-01), Nishizawa et al.
patent: 5214448 (1993-05-01), Venthem
patent: 5235400 (1993-08-01), Terasawa et al.

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