Browse Prior Art Database

Auto-Unloader Controller

IP.com Disclosure Number: IPCOM000040847D
Original Publication Date: 1987-Feb-01
Included in the Prior Art Database: 2005-Feb-02
Document File: 1 page(s) / 12K

Publishing Venue

IBM

Related People

Parilak, JE: AUTHOR

Abstract

This article describes a system for controlling solenoids and cylinders that direct the flow of module tubes at a semiconductor module load station so that full tubes are replaced by empty ones as required. This system reduces the number of logic gates required, reduces system debug time, and provides for a greater versatility than the current control system.

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Auto-Unloader Controller

This article describes a system for controlling solenoids and cylinders that direct the flow of module tubes at a semiconductor module load station so that full tubes are replaced by empty ones as required. This system reduces the number of logic gates required, reduces system debug time, and provides for a greater versatility than the current control system.

Referring to the block diagram, EPROM 10 contains four programmed routines for controlling the solenoids and air cylinder RESET, CYCLE TUBES, RELEASE TUBES AND LOAD TUBES. The RESET routine turns all air cylinders off to clear any jams. The CYCLE TUBES routine ejects full tubes from the loading station and shuttles them over to the full tube chamber. Then, an empty tube from the empty tube chamber is inserted. The RELEASE TUBES routine opens the empty tube chamber to allow the loading of empty tubes. The LOAD TUBES routine closes the empty tube chamber and inserts an empty tube into the loading station.

Each of the programmed routines is stored as a separate block of instructions in EPROM 10. When a requesting input, represented by block 12, is present, a block start address will be loaded into presettable counter 14. Pulses from clock 16 will then update counter 14, which in turn will step the EPROM 10 from the block start address through the requested routine, thereby controlling the solenoids/air cylinders represented by block 20, until an end block output disables gate 18, thereb...