Re: 2D/3D scanning of small brass pieces

From: Priit Kull (priit@abfbaltic.ee)
Date: Fri Mar 01 2002 - 11:20:20 EET


Hi.

Before the time of CMMs there were measuring microscopes. You could trace
the edge of any 2D shape and take as many points as you had patience. It was
usually a box with some nice diffuse back light, so what you actually saw
was the dark side of the moon, no shiny edges.

You can also project a shadow of your shapes on a white wall, take a picture
of that and treat them with any computer tricks available.

mfg
Priit Kull

Hi guys,

I'm not sure this made it to the list the first time, so I'm resending
without the attachment. If anyone thinks they could do this and would like
to see the image of a representative piece, just zip me an email.

Thanks!

 -----Original Message-----
From: Evan Brastow
Sent: Monday, February 25, 2002 2:43 PM
To: 'rp-ml@rapid.lpt.fi'
Subject: 2D/3D scanning of small brass pieces cheaply?

Good afternoon people,

We are a company that manufactures brass lapel pins and keytags. We have a
large inventory (500+ of our own different shapes, plus thousands of others
of our customers' shapes) of dies with which to punch out brass blanks to
form the basis of the pins.

One thorn that's always been in our side is that of trying to get accurate
outlines of these brass shapes (usually between 1/2" and 2" in size). We
would like to be able to get dead-accurate vector files (.eps (preferable),
.dxf, etc) of the outlines of all of these shapes.

Over the years, I've tried scanning the brass on a flatbed scanner and using
Streamline or anything else to trace the outline, but I'd like to get
something much more accurate, and the shininess of brass means that the
scanner doesn't pick up the edges well. I'm thinking that maybe a 3D scanner
could do this, and maybe produce the outline, even though the outline we
need is just 2D?

I'm attaching a picture of one of the pieces... representative of what we'd
need scanned. The pieces range from " to 2-1/2" in diameter.

Any idea of where I could get something like this done for a very cheap
amount of money? (a couple of dollars per file?)

Thanks

Evan

For more information about the rp-ml, see http://rapid.lpt.fi/rp-ml/

For more information about the rp-ml, see http://rapid.lpt.fi/rp-ml/



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