Main Menu

All times are in GMT -8 (DST) :: The time is now 8:40 pm.

Login or Register
Create an account and register your LMI products to gain access to useful resources.

Register Account

Login

Sub Menu

Knowledge Base
Article Data
Article Ref
6077-OFJV-2993
Date Created
Wed, 2nd Apr 2014
Date Modified
Fri, 3rd Oct 2014

   Accuracy testing standards used

Question 

What accuracy testing standards do you use?

Answer 

LMI uses a VDI/VDE ball-bar test to determine the accuracy of its scanners. For this test two spheres are mounted on a ball bar of know length. Scans are taken of the spheres as the bar is positioned in various orientations throughout the scanner's field of view (FOV). For each scan the distance between the spheres, calculated based on the scan data, is compared with the nominal value. The largest error at any location said to be the accuracy of the scanner.

Note: HDI Advance scanners are field-calibrated, so the scan data accuracy will depend on following good calibration technique.