DIY Ball-bar 3d scanning test -Advanced Modified Flexscan3D

[Khalid]

i purchased balls with a known sphere diameter of 20mm measured with micrometer. The scan results shows the 𝗱𝗲𝘃𝗶𝗮𝘁𝗶𝗼𝗻 𝗯𝗲𝘁𝘄𝗲𝗲𝗻 𝘀𝗽𝗵𝗲𝗿𝗲𝘀 𝟬.𝟬𝟬𝟮𝗺𝗺 𝗮𝗻𝗱 𝟬.𝟬𝟬𝟴𝗺𝗺 ( seems the thickness of white spray coating). The actual 𝗰𝗲𝗻𝘁𝗿𝗲-𝗰𝗲𝗻𝘁𝗲𝗿 𝗱𝗶𝘀𝘁𝗮𝗻𝗰𝗲 between two balls are 100.075mm and the scan measurement shows 100.086mm (𝘀𝘁𝗮𝗻𝗱𝗮𝗿𝗱 𝗱𝗲𝘃𝗶𝗮𝘁𝗶𝗼𝗻 𝗶𝘀 𝟬.𝟬𝟭𝟭𝗺𝗺).
𝗪𝗵𝗮𝘁 𝗮𝗿𝗲 𝘆𝗼𝘂𝗿 𝘁𝗵𝗼𝘂𝗴𝗵𝘁 𝗮𝗯𝗼𝘂𝘁 𝘁𝗵𝗲 𝗵𝗼𝗺𝗲 𝗯𝘂𝗶𝗹𝘁 𝘀𝗰𝗮𝗻𝗻𝗲𝗿 𝗮𝗰𝗰𝘂𝗿𝗮𝗰𝘆 𝘁𝗲𝘀𝘁?

I am using modified Flexscan3D software by greenskynet.

[Micr0]

i purchased balls with a known sphere diameter of 20mm measured with micrometer. The scan results shows the 𝗱𝗲𝘃𝗶𝗮𝘁𝗶𝗼𝗻 𝗯𝗲𝘁𝘄𝗲𝗲𝗻 𝘀𝗽𝗵𝗲𝗿𝗲𝘀 𝟬.𝟬𝟬𝟮𝗺𝗺 𝗮𝗻𝗱 𝟬.𝟬𝟬𝟴𝗺𝗺 ( seems the thickness of white spray coating). The actual 𝗰𝗲𝗻𝘁𝗿𝗲-𝗰𝗲𝗻𝘁𝗲𝗿 𝗱𝗶𝘀𝘁𝗮𝗻𝗰𝗲 between two balls are 100.075mm and the scan measurement shows 100.086mm (𝘀𝘁𝗮𝗻𝗱𝗮𝗿𝗱 𝗱𝗲𝘃𝗶𝗮𝘁𝗶𝗼𝗻 𝗶𝘀 𝟬.𝟬𝟭𝟭𝗺𝗺).
𝗪𝗵𝗮𝘁 𝗮𝗿𝗲 𝘆𝗼𝘂𝗿 𝘁𝗵𝗼𝘂𝗴𝗵𝘁 𝗮𝗯𝗼𝘂𝘁 𝘁𝗵𝗲 𝗵𝗼𝗺𝗲 𝗯𝘂𝗶𝗹𝘁 𝘀𝗰𝗮𝗻𝗻𝗲𝗿 𝗮𝗰𝗰𝘂𝗿𝗮𝗰𝘆 𝘁𝗲𝘀𝘁?

I am using modified Flexscan3D software by greenskynet.

I've done similar by scanning standards used to calibrate micrometers and have found similar if slightly larger deviations. I've also used a Zeiss CMM. to measure objects after I've scanned them and confirmed that, depending on the calibration, I could consistently expect about 0.01mm. However, I was not using flex scan. I was using David.

[Khalid]

Hi Micr),
I have used David before but the quality i get from Flexscan3D is unbeatable.

[Micr0]

Hi Micr),
I have used David before but the quality i get from Flexscan3D is unbeatable.

.002mm (.00007in) is probably within the tolerance of the standard (Ballbar).