Integrated Vacuum Probe Head and Sensing Apparatus
Original Publication Date: 1988-Jul-01
Included in the Prior Art Database: 2005-Feb-15
A pick-and-place tool for picking up components and delivering them to specified locations is described. The tool can sense the presence or absence of a component to be picked using a non-contact fiber-optic photocell. Referring to the figure, the pick-and-place tool 10 is shown in an exploded view. Fiber-optic photocell 12 is fed through the tool shaft 14 into the threaded tip 16. Vacuum is applied through the shaft 14 to the probe tip 16 via the vacuum port 18. Epoxy 20 around the photocell 12 housing at the top of the shaft 14 maintains the vacuum seal. Three alignment screws 22 (only two are shown in the figure) mounted at equally-spaced 60-degree intervals, center the photocell 12 into the probe tip 16. For accuracy, the photocell maintains a small clearance between its tip and the probe tip bottom.