Re: Projecting an SLS system: Scanning precision
Posted: 17 Nov 2017, 17:54
Also understand that even .15mm deviation is still within the volumetric accuracy of systems costing $20K+ I have an Artec Eva here on loan and I get .15mm on a good day. What I find is that the real difference is that the Artec software handles this much better than David. Artec has better error compensation algorithms so that you generally don't have fusion problems. That said I get clean smooth models that are easily .15mm out when compared to hard measured machined surfaces. Artech studio is very good a weighting the accuracy of the raw scanned data and how it influences the fused model. I went down the rabbit hole of trying to get David perfect and got very close. But I spent HOURS systematically doing it and I cant say after using David practically for a few years that it was completely worth it. I have also not found that level of precision to be easily repeatable over different scale setups. What I'm saying is don't spend too much time chasing perfection till you actually get some use out of the system and find out what your actual needs are. The more you use it the better you will become at understanding the errors in your system.3dxcan wrote: ↑17 Nov 2017, 13:46as you see in the pics, you have a center of yellow and green (~0.05 divation) which happens to be accelerating out of the divation zone (-0.15) as you move toward the calibration edges, gray areas on the corner are our of tolerance zone (-0.15,0.15).Its a lens problem. someone with a decent lens should give us his result.mading wrote: ↑17 Nov 2017, 09:24 Hi to all, I gave a tried to GOM inspect 2016, free version:
I have to check the perpendicularity of my panel: it is measured as 90.05°:
90.05°.jpg
Then I can fit planes (easy and straighforward):
Clip_4.jpg
Here you have deviations from fitted planes:
Clip_2.jpg Clip.jpg
what size of calibration panel are you using? whats the format of the camera sensor (eg 2/3", etc) and lens? what type of camera? global/rolling?