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martindiamonds
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Postby martindiamonds » Wed Feb 23, 2011 9:25 am

Hello, my name is Greg and I am new to not only the forum but also to the entire CAD world. I do have a question. I am trying to mill a pendant using a scan of a fingerprint. I attached a sample print of something I would like to mill. Can somebody point me in the right direction what i should do first. I believe that i have to do something with greyscale and give the image better black and white contrast. Thanks
Attachments
fingerprint copy.bmp
fingerprint copy.bmp (370.2 KiB) Viewed 3245 times

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ToddMichael
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Postby ToddMichael » Wed Feb 23, 2011 10:12 am

Greg,

1. you need to export the image in a Bitmap, BMP file from whatever used >
2. open 3d engrave, and import the BMP>
3. this is my step, go to Image, and
a. reduce colors to 16>
b. reduce noise
4. go to shape> convert to polygon>
5. Now you have your converted image>
6/7 If you have to clean up image
8. Save image to reuse later.

Repost if any other questions

Todd Michael
Attachments
Convert BMP #8.jpg
go to shape and register symbol, so you can use again if needed, I save everything, as it takes time to do the work, makes no sense not to save.
Convert BMP #8.jpg (34.89 KiB) Viewed 3241 times
Convert BMP #7.jpg
Edit Vortex points as needed to clean up design, once you get your design where you like and if you will ever use again,
Convert BMP #7.jpg (35.94 KiB) Viewed 3241 times
Convert BMP #6.jpg
Here vortex points highlighted, if you need changes
Convert BMP #6.jpg (38.06 KiB) Viewed 3241 times
Convert BMP #5.jpg
now you have your converted image,
Convert BMP #5.jpg (37.44 KiB) Viewed 3241 times
Convert BMP #4.jpg
Adjust the density as required
Convert BMP #4.jpg (37.26 KiB) Viewed 3241 times
Convert BMP #3.jpg
Here you can import as seen , or reverse positive and negative as needed
Convert BMP #3.jpg (33.81 KiB) Viewed 3241 times
Convert BMP #2.jpg
Go to image and convert to polygon
Convert BMP #2.jpg (33.96 KiB) Viewed 3241 times
Convert BMP #1.jpg
After importing the BMP, remove noise, and reduce colors here if needed
Convert BMP #1.jpg (36.5 KiB) Viewed 3241 times

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jeff dunnington
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Postby jeff dunnington » Wed Feb 23, 2011 1:27 pm

Welcome Greg glad to have you here.

Funny how many request I am getting now asking if the 3dwaxmill can carve a fingerprint. The answer is yes.

Here is a 3dengrave file i did for a sample.

open and click on one shape then tab through to see how it was built
Go to Relief / and delete the Relief then rebuild the relief

Let me know if you need some help.

NIce instruction Todd :D
Attachments
thumbprint-charm.3de
(946.34 KiB) Downloaded 278 times
thumbprint-charm.jpg
thumbprint-charm.jpg (177.34 KiB) Viewed 3234 times
Last edited by jeff dunnington on Wed Feb 23, 2011 1:45 pm, edited 1 time in total.

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ToddMichael
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Postby ToddMichael » Wed Feb 23, 2011 1:29 pm

Funny, most of my customers don't want to have a trace of their prints, any idea what the fascination is?

Todd Michael

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Colin Creed
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Postby Colin Creed » Wed Feb 23, 2011 1:31 pm

Hi Greg & Welcome to the Forum.

Todd has it all pretty much covered (nice job on that too, Todd)
The only thing I'd add is always try to start with a high resolution scan, say 600 dpi or an image that's of high quality.

regards Colin

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jeff dunnington
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Postby jeff dunnington » Wed Feb 23, 2011 1:44 pm

Todd

Do a search on google. Lots of Funeral home are now offering the deceased fingerprint as a charm to the family and asking a ridiculous price.

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ToddMichael
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Postby ToddMichael » Wed Feb 23, 2011 1:54 pm

Holy poopoo, $450 for sterling silver and $1800 for gold,

well thanks for the idea, have a few funeral home customers, will try it out!

Todd Michael

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ToddMichael
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Postby ToddMichael » Wed Feb 23, 2011 3:30 pm

"Imprint on My Heart".com

Is this someone from this forum, crazy money!

http://www.imprintonmyheart.com/closeup ... &offset=0#

Todd Michael

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jeff dunnington
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Postby jeff dunnington » Wed Feb 23, 2011 5:59 pm

Crazy yeah. No one from here that I know of.

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martin james
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Postby martin james » Thu Feb 24, 2011 9:14 am

Hi Greg If I were planning to cut the sample you posted, I would first print it on paper and then clean it up on a light table, then proceed. Scan it back in, convert as above etc.

I would also either dome it in engrave or after it was cast.

Have a nice day M

martindiamonds
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Postby martindiamonds » Thu Mar 10, 2011 5:45 pm

Hey all, I tried to mill Jeff's file of the finger print and this is what I ended up with. I milled my roughing and finishing pass with a .020 flat with Jeff's specs. One thing I might speculate on is that I did not have the mill all the way touching the wax on the finishing pass, it was a tenth of a mm off. Could this be the reason that I cant see the finger print? Thanks
Attachments
IMG_3614.jpg
IMG_3614.jpg (22.28 KiB) Viewed 3150 times

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martin james
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Postby martin james » Thu Mar 10, 2011 6:33 pm

go to 3dengrave, pull down the cutting poarameters and change it to ball, .01mm, fine. hit create tool path, then when it is done File>"output preview, that will open virtual modela, then in VM look for the command that makes the viewed area zoom, it is called "partial zoom' maybe.. then after zooming you can hit the 3d button to see the file from all sides.

I am somewhat sure that the problem is either a too big endmill, or the relief of the file is not set to .05mm.

hope help M


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