Hello friends.
Scans have dimensional accuracy problems (0.2mm-0.4mm).
Part length 55mm
My setup
calibration panel: 60mm (original hp panel)
dual cameras (david sls3)
hp 5.5.0
turntable
calibration values,
camera1 angle: 17.93 ˚ ===> Rms: 0.115
camera2 angle: 17.85 ˚ ===> Rms: 0.178
total: 36 scans
Why the dimensional accuracy is bad and what should I do to fix it.
accuracy problem
Re: accuracy problem
How are you deriving those error numbers/ How are you measuring the accuracy?
Also what is the scan subject? what is it made of?
µ
Also what is the scan subject? what is it made of?
µ
µ
Re: accuracy problem
Thank you Micro for your fast replay.
I made measurements again with my digital calipers tonight and yesterday I was wrong. The part material is silicone. When measuring, the part caused the wrong measurement because it stretched.
I froze the piece deep freeze before the measurement this evening (5 hours).
as a result the accuracy is 0.02mm
I made measurements again with my digital calipers tonight and yesterday I was wrong. The part material is silicone. When measuring, the part caused the wrong measurement because it stretched.
I froze the piece deep freeze before the measurement this evening (5 hours).
as a result the accuracy is 0.02mm
Re: accuracy problem
Squishy (very technical term) parts are difficult to get accurate measurements from. I had suspected thus. Glad you solved you problem.erol wrote: ↑28 Aug 2018, 21:49 Thank you Micro for your fast replay.
I made measurements again with my digital calipers tonight and yesterday I was wrong. The part material is silicone. When measuring, the part caused the wrong measurement because it stretched.
I froze the piece deep freeze before the measurement this evening (5 hours).
as a result the accuracy is 0.02mm
µ
Re: accuracy problem
Dear Eol,
Do you use the david Acer K132+?
Do you use the david Acer K132+?
LG PF50, LG PF1500, RangeVision DIY: 2x DahengMer630, 2X12 and 2X16 mm 5Mp ZK lenses, RV turntable
Re: accuracy problem
Nice scan!
HP 3D Scan, Optoma ML750, 2x IS DMK 23UX236 with Computar 12mm, HP calibration panel, DIY Rotary tables.
Re: accuracy problem
Thank you.
I have a david sls3 scanner (dual camera and v5.5) and original acer k132 +.
Another scan but I did not check accuracy
I have a david sls3 scanner (dual camera and v5.5) and original acer k132 +.
Another scan but I did not check accuracy
Re: accuracy problem
Very nice. You seem to be getting excellent results. Are the surfaces of your scan matching in smoothness to that of your subject?
µ
Re: accuracy problem
Thank you Micr0,
The surface smoothness in the scans is generally good and matches the object.
The surface smoothness in the scans is generally good and matches the object.