Any CAD Wizards out their ?
Any CAD Wizards out their ?
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Discussion

stesrg

Original Poster:

1,578 posts

269 months

Thursday 5th September 2013
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Ok I have a CAD cutting machine but if I get a outline that is complicated I takes hours to do this in AutoCAD , If I could get some sort of software were I can physically trace / copy the outline of a shape (2D) and put this in to my computer and plot it on a 1 to 1 this would be fab and save me loads of time , I have to resort to a black pen and trace the shape and use a magic eye cutter to do this ...

Any input will be most welcome

ste .

Crusoe

4,126 posts

262 months

Thursday 5th September 2013
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Sounds like what you really want is a 3d virtual scanner - coming down in price and recently bought one for quality inspection here. You might get away with a drafting tablet though if you can draw round an outline you would create the profile and then you could tidy it up in cad.



dave7692

683 posts

160 months

Thursday 5th September 2013
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Are you looking for something that will automatically convert a PDF/Scanned image into a CAD drawing or just a means of tracing an image?

As far as I'm aware there aren't too many reliable programs that will automatically convert an image to a CAD outline. The way I deal with it at work is to insert the image as a "Raster Image", make sure it is appropriately scaled and then simply trace over it.

It can be a bit laborious especially on larger/more complicated drawings but thus far its the most effective way I have found of getting an image into Autocad.

Crusoe

4,126 posts

262 months

Thursday 5th September 2013
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If you setup a photo rig you could import and scale a photo in CAD then draw the outline onto that too if you just needed a 2d external profile.

Engineer1

10,486 posts

240 months

Thursday 5th September 2013
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I believe Zund have a scanner that can convert an image into a CAD line, I haven't got all the details as it was something one of the production engineers looked at briefly till he was told he was trying to solve a none existant problem.

Gilhooligan

2,221 posts

175 months

Thursday 5th September 2013
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Out their what?

Captain Muppet

8,540 posts

296 months

Thursday 5th September 2013
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Sometimes you just have to scan/import it and trace round it on CAD.

Every time I get stuck with something that's tedious to model I remind myself how much easier it is to model than saw through metal.

It's even more tedious if you get send point cloud data that someone wants to run analysis on. Convert the cloud to a surface, find that the quality of the data isn't good enough to turn in to a solid, then model the solid to match the profile. It's really annoying to try to replicate a complex casting like this.

Ean218

2,046 posts

281 months

Thursday 5th September 2013
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Anything up to A3 size I photocopy, scan the photocopy and then turn the resulting tiff/jpeg into a dxf file using Corel Draw. You can even piece multi A3s together if the thing is over size.

Works pretty well most of the time, lastweek we copied some old wooden boat window templates that were about 3 foot long, so that new windows could be CNC routed. The customer was very happy with the fit and now doesn't have the templates cluttering up his workshop!

eesbad

1,330 posts

233 months

Thursday 5th September 2013
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http://www.scan2cad.com/

Used this in the past - can give you a CAD drawing that you can tidy up or 'trace' around.

endo

245 posts

212 months

Thursday 5th September 2013
quotequote all
You'll need a scanner, the better the res the better to get the image onto the computer.

Then once on the pc, you can use an open source vector program called inscape to auto-trace the raster image, and convert it to vector. Then delete base, image and save the paths as dxf, dwg etc.

It'd be an idea once you've got the base drawing to clean it up as you can get redunant nodes, and random artifacts from raster to vector conversion, basic drawing will be good enough for most purposes, but well worth spending a bit of the time saved on getting it right.

plasticpig

12,932 posts

256 months

Thursday 5th September 2013
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Sounds like a CAD digitizer is what you need. They go from A3 to A0 in size depending on what your requirement is. Got a couple of clients who use Calcomp roll up digitizer's. Ideal because you can just roll it up and store it when not in use rather than it taking up a lot of room.

stesrg

Original Poster:

1,578 posts

269 months

Thursday 5th September 2013
quotequote all
WOW !! Thanks for all the replies smile In a Ideal world I would like a probe or pen type instrument were I can follow the outline off the template , say 2mm flat pice of steel sprocket shaped say about 800mm in diameter , I put it down on the table and run the probe all the way round , this then goes onto my computer to which i put it into cad alter it then plot it on a 1to1 then cnc plasma it out .....

This is what I realy need ...

keep em comming might be on to something here woohoo I have been looking at some american machines but the company has not contacted me yet

Ste .

3000GT ANT

347 posts

187 months

Thursday 5th September 2013
quotequote all
Ean218 said:
Anything up to A3 size I photocopy, scan the photocopy and then turn the resulting tiff/jpeg into a dxf file using Corel Draw. You can even piece multi A3s together if the thing is over size.

Works pretty well most of the time, lastweek we copied some old wooden boat window templates that were about 3 foot long, so that new windows could be CNC routed. The customer was very happy with the fit and now doesn't have the templates cluttering up his workshop!
this is also the method i use. sorry op for going on a slight tangent but EAN have you tried to use this method to create a 3D part? its quite difficult to say the least...

Crusoe

4,126 posts

262 months

Thursday 5th September 2013
quotequote all
stesrg said:
WOW !! Thanks for all the replies smile In a Ideal world I would like a probe or pen type instrument were I can follow the outline off the template , say 2mm flat pice of steel sprocket shaped say about 800mm in diameter , I put it down on the table and run the probe all the way round , this then goes onto my computer to which i put it into cad alter it then plot it on a 1to1 then cnc plasma it out .....

This is what I realy need ...

keep em comming might be on to something here woohoo I have been looking at some american machines but the company has not contacted me yet

Ste .
Any of the cad tablets or the roll up mat suggested above would let you put the part down on top and use the pen devide to draw round it to make a 2d cad drawing. if you have more to spend there are 3d probes that would take measured points and feed into a cad program though a 3d scanner may be just as effective for the size of parts you are making.

e.g. http://www.rolanddga.com/products/scanners/lpx600/


Engineer1

10,486 posts

240 months

Thursday 5th September 2013
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If you go for 3d a Roma arm or similar is a good bet, get the right probes or you get profiles that don't intersect the surface points, some cad software is intelligent enough to generate a surface others like CATIA chuck hissy fits and force you to repair the profile and link the surface points to the profile.

stesrg

Original Poster:

1,578 posts

269 months

Friday 6th September 2013
quotequote all
Some complicated stuff out their for tracing a simple shape , why cant you put a shape (flat) on to a white background trace round it with a usb sort of pen and this can mimmic the line on computor ? I have seen the pen pads but they are not big enought to cover a wide range of shapes 1 meter square max would do the job, I liked the photocopy one but dont it come out as black ? or have you the software to eliminate this in acad ?

Looks like I will have to keep my magic eye profile/plasma machine then !! frown it still proves the old stuff is better than the new , if I get a job in and the one side is ripped out sort of complex shape and the other side is ok (symetrical shape) I can get a white card up against the shape and draw round it with a fine tiped marker pen put it on my profile table and my old machine will trace it job done less than an hour , but if I use cad this could take me 6 hours to get the same exact shape !! THEIR HAS TO BE SOMETHING OUT THEIR ???

anonymous-user

85 months

Friday 6th September 2013
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You can do this in Adobe Illustrator. You can use the pen tool to draw around the image and export that as a .dxf file (or at least some kind of file format that AutoCAD will read).

I would check exactly how to do this, but I don't have it on this PC.

Juanco20

3,352 posts

224 months

Friday 6th September 2013
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Going a bit off piste here but what grade of material is it that you are plasma cutting at 2mm thick?

And is it supplied to you with 3.1 certification?

crazy about cars

4,454 posts

200 months

Friday 6th September 2013
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