Browse Prior Art Database

Precision Drilling of Glass Artwork Masters

IP.com Disclosure Number: IPCOM000050078D
Original Publication Date: 1982-Sep-01
Included in the Prior Art Database: 2005-Feb-10
Document File: 2 page(s) / 13K

Publishing Venue

IBM

Related People

Hooker, WL: AUTHOR

Abstract

The standard method for alignment of a workpiece, such as glass artwork masters, to a jig borer table involves the use of an optical microscope. The microscope is placed in the spindle of the jig borer and focuses vertically down onto the workpiece. The purpose of the microscope is to identify the precise intersection point of the borer spindle's vertical centerline with the horizontal artwork plate. The machine operator must first ensure that the optical axis of the scope is coincident with the vertical centerline of the borer spindle. This operation requires manually rotating the spindle and attached scope to note any movement of the image; such movement is an indication of non-coincidence. Adjustments are then made to achieve coincidence.

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Precision Drilling of Glass Artwork Masters

The standard method for alignment of a workpiece, such as glass artwork masters, to a jig borer table involves the use of an optical microscope. The microscope is placed in the spindle of the jig borer and focuses vertically down onto the workpiece. The purpose of the microscope is to identify the precise intersection point of the borer spindle's vertical centerline with the horizontal artwork plate. The machine operator must first ensure that the optical axis of the scope is coincident with the vertical centerline of the borer spindle. This operation requires manually rotating the spindle and attached scope to note any movement of the image; such movement is an indication of non-coincidence. Adjustments are then made to achieve coincidence.

After coincidence is achieved, the X-Y axes of the artwork master (via two line up targets) must be aligned to the X-Y axes of the jig borer. This manual adjustment is performed by rotation of the jig borer table.

Following axis alignment, an origin point is established relative to the two line up targets; the scope is removed and replaced with a diamond drill. Three holes are drilled in the glass from this set up.

This entire procedure is repeated for each subsequent artwork glass to be drilled.

The basis for this invention is twofold. First, a jig bore microscope is permanently mounted adjacent to the jig bore spindle. Its optical axis must be parallel to that of the jig bore spindle, and its lateral offset is arbitrary, but known. Secondly, a programmable calculator is interfaced to the X and Y axis digital location readouts. The interface is such that X and Y jig bore table coordinates may be read into the calculator.

Having once determined the lateral of...