Gallery, Projects and General > How do I??

Quartz Surface Plate?

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jcs0001:
Sparky:

Not sure if you've seen this.  Evan describes using a cheap laser level (capable of generating a horizontal line) and a tripod to mount it on to get an estimate of the flatness of a surface:

http://bbs.homeshopmachinist.net/threads/18917-Qualitative-flatness-testing-cheap-%28pics%29

John.

PekkaNF:
There is pretty good way, if you have time and good level. I have some proof that there is method for one spirit level and for two....Any solid information?

Procedure is somewhat like this:
http://www.mate.tue.nl/mate/pdfs/1698.pdf

There must be somewhere a punch list instruction, but this should give a good foundation on theory.

Pekka

BaronJ:
Hi Sparky

--- Quote ---Would 3-point contact of the height gauge base be of more benefit than the flat base that can rock a bit on imperfections?

--- End quote ---

Use three ball bearings to stand your indicator base on.  If necessary a touch of super glue will hold them in place.
 

sparky961:
Thanks for the new info and tips. I'll give an update once I've made some progress.

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