Giles G-200 – Laser Scanning

I returned to Sonora last week to re-scan the Giles G-200, this time with the Creaform EXAscan laser scanner.  I had previously digitized much of the Giles with the FARO arm, but once we decided to also do the plenums, I realized that a laser scanned model of the engine would be very helpful.  It wasn’t much of a mental jump from there to say “well, may as well re-digitize the whole thing and use the T-Splines retopo tools to really do this thing right.”  So, over the course of three days – three very, very cold days in an uninsulated, unheated shop – I re-digitized the whole thing.  One of the things that really sold me on the EXAscan is the ability to start a scan with all the items in assembly, and then to finish it off with the items disassembled.  That might not seem like a huge deal, until I mention that once you setup your scan, even if your parts are no longer in assembly, they show up as if they are still assembled.  This means that you can fill in the holes in your scans – the portions you cannot scan because they are being blocked by other parts of the model – and end up with seamless models that don’t have to be assembled from multiple patches.  This is a massive time saver, and never gets old.  You can also set different resolutions for different parts of your model – so the induction and exhaust tubes need very little resolution to look good, but the throttle body was done at a much higher resolution due to the higher amount of detail.  Overall, I’m thrilled with the quality of the data that I have, and the fact that unlike with my mechanical arm, it’s a much  more direct path to creating the cowling and fairings.  Enough talk, here’s some screen shots:

Comments
5 Responses to “Giles G-200 – Laser Scanning”
  1. You are a mad man. Thanks for using the HandyScan as it is intended. Got to love those little refelctive targets.

  2. FormulaX says:

    You’re doing a great job selling me on the EXAscan! How long is that going to take to surface in T-splines?

    • It’ll probably take me between 5 and 10 hours to do all the “homework” portion of the design – that is making all the reference geometry and construction planes necessary to get to the good stuff – actually sculpting the cowling and fairings. Probably another 5 to 10 hours to finish the real design work – that is the T-Spline work, and then at least 20-30 hours to do all the mold design and G-code generation. On something like this, which will have lots of complicated geometry, the mold layout can be the hardest part of the job. -Sky

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