More engraving stuff

The next photo is on a 3" mirror, I only have 80 of these to engrave in the next two weeks. Note that it is very hard to take a good photo of a mirror, so this photo doesn't do the engraving justice.

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F-engrave

F- engrave is a very good open source gcode generator for engraving. Below are a couple of photos of receient work I've done with mirrors using a spring loaded diamond spindal mount engraver. This is called Diamond Drag Engraving, no spindal rpm. 

Whistle while you work...

With the new aluminum table installed and everything now flat and square, I wanted to take a shot at milling something a bit more complex for my overal CNC education and to see what the Shapeoko 2 can really do in regards to precision.  The parts are for a Flat Nautical Whistle.  There are several depths that must remain constant and accurate. The radius for the completed parts also need to matchup otherwise the whistle will not work. So the real test is, will the whistle produce 3 separate tones when assembled.  Remarkably it worked, so well that I was asked to stop testing it! Please see the photos below. 

CNC Table

Well I wish I could say how easy this was but it took me an entire day to switch over to an all aluminum platen for the Shapeoko 2 CNC.  Broke a tap off In the last hole I was working on and it took almost 5 hours to recover from that mistake!!!  Without any adjustments the table is square forint to back and only out .005 side to side.  I will add some .002 shim stock and hopfully that will bethe end of that. Overall the the CNC is more rigid, but then again I haven't cut anything yet...