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

From: John Wright (johnw@ra-ltd.co.uk)
Date: Fri Mar 01 2002 - 14:25:32 EET


The best and most accurate way is to find somebody with a Renishaw Cyclone.
The Cyclone has the ability, like our in house machine, to drive a contact
probe around a profile. Its probably the most accurate thing for doing this
(Renishaw scanning probes work down to better than .010mm), more importantly
there is no messing about by the user - just put the piece on the Cyclone,
and tell it the pitch of points you want and away it goes. Probable time to
do something the size you are talking about is < 1 min/scan.

To find out your nearest user contact Gerry Bowyer at Renishaw Metrology
gerry.bowyer@renishaw.com

Best Regards

John Wright
Response Associates Ltd.
Tel 44 1747 841475
Fax 44 1747 841471

email: johnw@ra-ltd.co.uk < mailto:johnw@ra-ltd.co.uk>

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> -----Original Message-----
> From: owner-rp-ml@rapid.lpt.fi [mailto:owner-rp-ml@rapid.lpt.fi]On
> Behalf Of Priit Kull
> Sent: 01 March 2002 09:20
> To: ebrastow@automatedemblem.com; rp-ml@rapid.lpt.fi
> Subject: Re: 2D/3D scanning of small brass pieces
>
>
> 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/
>

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



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