Closing in on wheel castings

Thanks to Brian Pate, and to Don Mitchell who suggested I call him, I’ve started vacuuming my castings when I pour them.  Brian indicated that he liked to vacuum before and after pouring, but I’ve found the pre-pour treatment makes little difference.  The post-pour treatment, on the other hand, dislodges all sorts of bubbles from the deep recesses of my molds. The resin is Smooth-Cast … Continue reading Closing in on wheel castings

Etching pattern begins

As I start work on the pattern for etching, there is good news and bad news. First the good news: it appears that OnShape have improved the compatibility with Inkscape, and so, now I can take flat patterns from OnShape and import them directly into Inkscape without traversing through QCadCam.  Someone is still resizing the part along the way, but I suspect it is Inkscape, … Continue reading Etching pattern begins

Virtual dry fit for 622

In typical Panglossian fashion today, I uploaded the STL file for 622’s plastic parts to Shapeways.  I might have hit the big “Print” button, if the bounding box hadn’t precluded the use of their highest resolution machine. It’s a good thing I didn’t because the pause gave me an opportunity to assemble all the parts in OnShape. There I found that the gearbox was going … Continue reading Virtual dry fit for 622