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Old 04-22-2019, 09:50 PM
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Default Need help with dxf

I did some repair work on a bunch of these cast iron urn bases for one of my repeat customers. It's not something I normally do, but this is a really good customer.
He asked if there is any way I can make something similar. I can likely plasma cut a bunch of stacked parts, but it would help to start with a dxf of this photo. I have tried my usual tools, but I get nothing useable.
Anybody here have a way to convert this to a basic lines drawing?

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Old 04-22-2019, 09:51 PM
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The picClick image for larger version

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Old 04-22-2019, 10:41 PM
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There have been a few times when it would have been very helpful to be able to create a .dxf file from a drawing of some other format but I've never found anything that could do it.

We have a supplier who has a 42" x 42" flat scanner. We could take them a line drawing or even a cut out shape and they could scan it and create a .dxf. That might work for you if you can find someone with a large scanner. You would have to find someone with a scanner that had the right software, though. It would have to be capable of saving files as a .dxf.

The problem arises because drawing files created by drafting programs are generally vector files where each point is linked to every other point by a a fixed dimension. Raster files--which includes most free-form image styles like jpegs--are just a series of randomly located pixels in a file and are not mathematically linked to each other...
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Old 04-23-2019, 12:53 AM
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Time for you to learn a new skill, casting iron.
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Old 04-23-2019, 12:58 AM
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Cast it in Aluminum.
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Old 04-23-2019, 01:27 AM
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Quote:
Originally Posted by GWIZ View Post
Cast it in Aluminum.
+1
You could make a silicone rubber mold of it then, cast it in resin and use the resin piece as a foundry pattern.


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Old 04-23-2019, 06:16 AM
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Or 3d print a plastic one?


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Old 04-23-2019, 07:37 AM
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Try this one Andy. It's free.
I tried to convert it but there is not enough contrast.
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Old 04-23-2019, 10:12 AM
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Using what you've got doesn't leave much to go off of. I've got a tool in my CAD program that would come pretty close, but would require a direct side shot with some seriously good lighting. It'd still end up with a bunch of errors/corrections that would have to be made before you'd end up with a usable file. Your best bet would be to find someone with a 3D scanner and have them build you a model.

I gotta agree that making a mold and casting the piece would be faster and less labor intensive.
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Old 04-23-2019, 03:20 PM
Rob65 Rob65 is offline
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It would be quite quick to take a mould from it using either resin or rubber and then use that to make GRP or even concrete replicas.

Would that be acceptable to you client?

Rob


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