HVAC . Pattern Development

[TinWhisperer]

Here is a link to a square to round I made awhile ago

HVAC parts Square to Rounds 26 GA galvanized

I have made quite a few square to rounds over the years but this is the first using a CNC. Over the years I became very familiar with laying out and fabricating square to rounds by hand. When SketchUp came came out I started laying out fittings in that CAD environment , Acquiring all the true lengths, then stepping out the points with a compass on my sheet metal. Then I bought a bigger printer and could print out sometime 20 pieces of paper glue them down to the sheet metal, then cut out of t…