Re: accurate span measurment


[ Follow Ups ] [ Post Followup ] [ Meshing with Gears Discussion Forum ] [ FAQ ]

Posted by BillS on December 06, 2005 at 20:04:12:

In Reply to: Re: accurate span measurment posted by John Thomas on December 06, 2005 at 17:45:59:

Yep - you could squeeze .0006 out of a pair of disk mics since the disc surfaces are not fully supported in the measurement.

I agree with you - an over pin would probably be more practical and accurate than a span measurement, anyway.

We used to use a Zygo laser gage and measure over pins to avoid differences due to micrometer pressure, especially with small pitches and tight tolerances. That Zygo could be calibrated to +/- 10 millionths as I recall.


Follow Ups:



Post a Followup

Name:
E-Mail:

Subject:

Comments:

Link URL:
Link Title:
Optional Image URL:


[ Follow Ups ] [ Post Followup ] [ Meshing with Gears Discussion Forum ] [ FAQ ]