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Anybody build Dan Gelbart angled laser centre finder?

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vtsteam:
Good work! Looks like you've got a working device as a prototype, Pekka. How accurate are you able to locate a center with it at this stage?

PekkaNF:
it all really depends how you can read these, but intially it looks like under 0,15 mm on flat features. On round features it looks very acuurate. Needs more testing.

On that black cylinder even spec of dust flares up. On bright flat a centre punch is not that easy.

Any suggestions of test? No DRO.

Pekka

Steamer5:
Hi Pekka'
   Looking good, I've been quietly following from the side lines. Ok to make you marks show up, colour the surface in blue of you choice, scratch your cross lines, center punch or what every as the laser crosses from blue to the scratch mark the dot will go bright. My laser center finder has blue card with a white cross on it to use for checking / adjusting it ,working on this idea.
In this part of the world you can buy oring material off the roll & make your oring to what ever size you need ......glue with a contact adhesive, getting the ends lined up is a bit of a trick but in this instance it's probably not that important. Hope this is of help

Cheers Kerrin

PekkaNF:
Hi Kerrin,

Thanks for the tip. I got the most part of it and will try....I have't got layout-blue yet. Almost got it two years back, but the shop would't air mail it to me. But'll find proper substitute. I allready have engineers blue and then two different stuff for scraping. I hope I will not emerge frm the shop all blue and join VT:s army of blue.

I have noticed that surface quality has a lot of do how easy it is to line up stuff, also the brightness of the beam is a big thing. Evolution version will have a filter or linear polarizer.

The last part escaped...would you alaborate a little bit more on "oring material off the roll & make your oring to ...." Sort of laser printable transparent material or cross hair printed on it, possibly on mylar or any non streching material?

Thanks,
Pekka

Sid_Vicious:
oring = O ring. It means rubber material on a roll in different thicknesses. You choose your length and glue it together into a ring.

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