Browse Prior Art Database

Parts Sensing System

IP.com Disclosure Number: IPCOM000035380D
Original Publication Date: 1989-Jul-01
Included in the Prior Art Database: 2005-Jan-28
Document File: 3 page(s) / 65K

Publishing Venue

IBM

Related People

Cook, DD: AUTHOR [+3]

Abstract

A planetary lap machine is used to lap parts which are helfiber carriers (20 parts per carrier) during a lapping cycle. To automate this operation, difficulty has been experienced in locating the carriers after a lapping cycle is complete, because the carriers are at random locations in the lap machine.

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Parts Sensing System

A planetary lap machine is used to lap parts which are helfiber carriers (20 parts per carrier) during a lapping cycle. To automate this operation, difficulty has been experienced in locating the carriers after a lapping cycle is complete, because the carriers are at random locations in the lap machine.

This system uses four sensors, each of which performs a different function. Sensors #1 and #2 are reflective scanners and sensor #3 is a probe that detects an electrical ground, all three of which sensors are housed in the fixture and are actuated by an air cylinder. Sensor #4 is similar to sensor #3 in that it detects an electrical ground and is housed in a "robot gripper".

Sensor #1 detects the leading edge of a parts carrier as the lap plate is rotated. When the edge has been detected, a command from a computer stops the rotation.

Sensor #3 detects a hole in the center of each parts carrier. A spring-loaded probe is lowered against the carrier approximately .375 inches from the center hole. The lap plate is rotated again until the probe springs into the hole. When the probe contacts the lap plate, a ground signal is sent to the computer which stops the lap plate from rotating. The parts gripper is at a location now that is known to the robot gripper and is ready for pick up once the robot gripper is oriented with the parts carrier.

Sensor #4 is a spring-loaded probe located on the robot gripper and is used to orient the robot gripper by computer command directly over the parts carrier. The robot gripper is lowered by computer command directly to the parts carrier. (A sensor in the...