Scan Tracker for Next Engine
by aeron203, published
This device sits on your Next Engine scanning platform to help you get the best quality scans. It works by providing extra geometry to increase alignment accuracy. This is especially useful for scanning objects that have a very regular shape like a sphere or a cylinder. It also helps with manual initial alignment by giving you recognizable reference points.
A volume-optimized version of the Scan Tracker is available from Shapeways at http://shpws.me/1Uvl. The Nylon will partly diffuse the laser light. To increase the accuracy, the Dark Grey Strong and Flexible material will help prevent this. Printing on a home FDM machine, you will get the best results by sanding and painting the tracker with a light grey primer.
UPDATE: The solid version here was missing many of the fillets used in the hollow version in the photo and on Shapeways. Please download version 2, which is much more fillety. Hopefully not too many were sent to print yet!
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Simply place the scan tracker on the platform so that it is included in the scan. Do not trim the data out until after the scanning and alignment is complete, but do remove it before building a final mesh. When using manual alignment, be sure to click the correct reference points. The tracker has five-sided radial symmetry that could cause a bad alignment if your initial reference points are incorrect. I recommend using ten scans to build your object. The reference points will assist you in keeping track of your manual rotation as well.