How to compute or estimate a micrometer or caliper flatness using optical flat

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garyf2017

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#1
#1
Hi experts- how do we compute or estimate a micrometer or calipers flatness using optical flat? Is it by just counting the bands and give a value- we have a monochromatic light. a step by step guide would help a lot.

just confused on how the values are calculated based on the bands distance etc..

TIA
 
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#2
#2
Hi Gary,

Some more info would be helpful.
I've used micrometers and calipers my whole professional life (at least until I replaced most with a CMM)...and I've never heard of measuring caliper flatness...only it's repeatability, accuracy and reproducability.

What is your end goal in trying to do what your trying to do?
Did someone question the flatness and parallelism of the micrometer faces? Something else?
 
RW451

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#3
#3
Gary,

You have the correct idea. Used to have procedures but can't place them at the moment. However, just go to YouTube and search Kement.co.uk. There are a few to get you started on creating your own procedure.

Regards.
 
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