More Fourth Axis Variations

Vertical Wall Gasket Dispensing

    With a theta mounted on the Z axis, it becomes possible to accurately dispense gaskets along the vertical walls of objects. In this example we have machined sockets which require a seal at the entry point. By itself this is not a difficult concept. The difficulty in doing this kind of thing in production lies with the issue of tip calibration. Using a unique calibration process that definitively locates the dispense tip no matter the tip angle or length of arm from center of rotation, New Precision Technology has simplified this technique, making it a production-friendly process.

In this application we applied a gasket to the inside of the socket as well as to the outside face. The outside face was not necessary, but dispensing the gasket on this face was more observable.

Compliant foot gasket dispensing: square

    In this example we are converting XYZ coordinates imported from a DXF file to YZ and theta coordinates only when the RUN button is pressed. The advantage here is that all of the traditional tools still apply: needle tip calibration offsets, height measurement offsets, and laser programming tools loose none of their value despite the radical shift in coordinate systems.

Properly applied, it becomes possible to dispense gasket compounds with less than +/-0.0005" (+/-12 micron) height variation across the entire gasket. The scan images illustrate the consistency and of course also point out our ability to verify the consistency!