[ImanCarrot]

Here's the smallest thing I ever designed and machined... you can barely see it against the drawing in the first piccy

The second piccy has them near a ten pence pice for scale and the third shows it machining

I managed to control the radius to 5um and the peak to valey on form to 0.2um. Lost a few on the floor though lol, if you drop them you got no chance hehe.

[BrendaEM]

They're clear too; it must make them easier to find : P

[307startup]

pardon me for opening my mouth and sounding foolish...but what exactly are those things...what are they used for...and what purpose do they fill? Those are some pretty tight tolerances....

[Geof]

So it appears the aluminum disc you showed the other day is involved in the manufacture of these teeny things. Pray tell, why such a b*****y big disc for such a small part? And for scale perhaps you could nip down to the money exchange and pick up a US quarter not one of them funny furrin coins you used.

[kentavv]

What are you guys talking about? I didn't see anything in those pictures...



Really pretty amazing actually. You must wear a magnifying lens when working on those little babies.

[ImanCarrot]

Hehe, they're optical antennas, used to focus light down onto a micro ccd for *mumbles* something I'm not allowed to say about.

I made the ally disk that size so that I can use it on other jobs that might be bigger- the spindle has a vacuum going through it- so the whole plate acts like a vacuum chuck, but these parts are so small that the vacuum doesnt hold them... I have to use a scientificaly proven quick drying adhesive that can be removed rapidly causing minimum damage... "Tippex" (or typing correcting fluid lol).

And yep, I use a jewlers loupe (magnifyer) to check the surface quality

[hanermo]

Really Cool !

How do you measure to 0.2 um ?

[ChrisW]

Here is my smallest part I made.

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