Browse Prior Art Database

VACUUM SWITCHING SYSTEM

IP.com Disclosure Number: IPCOM000005886D
Original Publication Date: 1990-Mar-01
Included in the Prior Art Database: 2001-Nov-14
Document File: 3 page(s) / 111K

Publishing Venue

Motorola

Related People

Andy Marozsan: AUTHOR [+2]

Abstract

The need arises in robotic assembly stations for the use of multiple vacuum sources due to the increasing complex- ity of robot gripper design. In the past multiple vacuum generators have been implemented to facilitate these requirements.

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m MOTOROLA Technical Developments March 1990

VACUUM SWITCHING SYSTEM

by Andy Marozsan and Rich Musco

The need arises in robotic assembly stations for the use of multiple vacuum sources due to the increasing complex- ity of robot gripper design. In the past multiple vacuum generators have been implemented to facilitate these requirements.

The use of multiple generators has many drawbacks. A few of them are:

1) Weight. The use of multiple vacuum generators greatly increases end-of-arm weight. This increase will affect the overall performance of the manipulator (speed and accuracy)

2) l/O requirements. Using five vacuum generators will require the use of 10 input/output lines.

3) Expense. Multiple generators double the cost of the typical end-of-arm system.

   This invention overcomes these problems. The vacuum switching system encompasses a stepper motor, a rotary vacuum manifold and support electronics. The basic function of the system is as follows (please refer to the accompany- ing assembly drawing (Fig. #l) and schematic (Fig. #2)).

   If the robot is to pick a component on nozzle #2 of the gripper, it will output a binary 2 to the vacuum control circuit. The circuit will automatically advance the stepper motor to the number 2 position. Connected to the shaft of the stepper motor is a rotary vacuum manifold. A single vacuum generator will supply vacuum to the center inlet port of the manifold. This vacuum will now be available at port number 2 when the stepper motor...