Browse Prior Art Database

Limit Stop Circuitry for Servo

IP.com Disclosure Number: IPCOM000098527D
Original Publication Date: 1960-Dec-01
Included in the Prior Art Database: 2005-Mar-07
Document File: 2 page(s) / 45K

Publishing Venue

IBM

Related People

Schulz, RA: AUTHOR

Abstract

This is a limit stop control circuit for a digital computer controlled servo mechanism featuring servo disconnect at the limit stop and automatic reset.

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Limit Stop Circuitry for Servo

This is a limit stop control circuit for a digital computer controlled servo mechanism featuring servo disconnect at the limit stop and automatic reset.

Normally, the high or low, and sign outputs of the computer control rate and direction of the servo drive. Upon driving into a limit, the limit switch initiates the warning circuitry, operates the relay, and initiates the logic circuitry. The operated relay disconnects the servo control from the computer and prepares automatic reset by applying the opposite sign and a low signal to drive the servo back out of the limit. Upon release of the limit switch, the servo stops driving and the logic circuitry, which is latched to the original sign from the computer, maintains the relay and warning circuitry.

Subsequent reversal of sign from the computer unlatches the logic circuitry which terminates the warning circuitry and releases the relay. The released relay reconnects the servo control to the computer outputs and normal operation is resumed.

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