Re: Centering technique

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Windell Oskay

Our technique is much like mlowe’s, except that we just sight over the edge of the ornament to the edge of the Eggbot’s frame.  With motors off and pen up, I spin the ornament around one full turn by hand, and align it such that the highest point is pointing up.  Then, push the ornament into the spring plunger just a little, slide the end down at the motor side, and spin it around again to check.  Usually, this takes just that two pairs of spins and about fifteen seconds, when switching between two objects of the same type.

The precision egg coupler itself is *great* for eggs, but doesn’t work well on bare glass surfaces.  There should be a big rubber washer that came with your kit, which serves as a grippy interface between the glass and the coupler.

If you are experiencing breakage while engraving, there are a few things that you might consider:
– Try to find some ornaments that have thicker walls. You can tell by tapping the surfaces.  Some ornaments are simply paper thin, and there’s hardly anything you can do to avoid breaking them while engraving.  Ornaments with thicker walls can be much more robust.
– Reduce the vibrating speed of the motor, move more slowly.  This makes marks that are less deep, but more accurate.
– And the other big one: Reduce pressure.  Let the diamond tip barely touch the surface, rather than using the springy hinge to push it down.