Flatness measurement

[wxll]

does anyone have an idea of how to measure flatness, parallelism and thickness with a non contact measuring device. Tolerance is +/-.005 inches. Measurement range to be .060 inches.

These plates are small 6 x 9 and have lots of Z axis surface variation. The customer would like a Tir readout but may settle for 9 points of measurement on the surface of the part.

thanks for your help.

 

What size? 6x9 what?

 

[wxll]

Sorry, 6 x 9 inches. The panels must be molded .075 to .080 inches. We need to check the thickness at 5 locations. The measurement pattern would be an "X". Sensors at the corners and one in the center of the part.

thanks for your reply. Hope you can help.

 

[randi]

A laser mike by Pratt & whitney, later " Honeywell" or may be sold under another name now was used for non-contact measurement of thickness of pin-gauges. I am sure a vendor of a similar dveice must have developed an application that should be suitable to your case. " Quality" magazine publishes a Buyers guide annually, you may want to check with them also.

 

[IRstuff]

Wyko, Dektak and a number of other manufacturers produce scanning optical profilometers with software for calculating the both global and local roughness and flatness.

TTFN

 

[carlorom]

Hi,

I do not have too much time to answer this but suggest you look at LEICA instruments website - they manufacture high precision Laser machines which are used to model surfaces etc accurately - see their high precision instruments-if need more information end a reply and I shall follow up on Threadminder.

Good luck