paperdrawing transfer to cad

[helge]

hello,can somebody transfer a paper work drawing of a 1700-1800 frigate to a cad program for cutting parts for me. Cost?

 

rgds Helge,norway

[bruce d]

I am glad someone asked this question, well done Helge.

 

Bruce

[Mark P]

Good Afternoon Helge;

 

If you have a completed drawing on paper, I assume of a large size, the  usual course would be to have the drawing scanned at a printer's works or by someone with a large-format scanner. The output will then be in a digital format, ideally png file, which can then be sent anywhere in the World by email, and loaded into a CAD drawing as an underlay. This underlay will have to be traced over using AutoCAD generated lines, arcs or curves, though, before it can be 'seen' by the CAD software.

 

I am not aware of any software which will reliably convert a paper drawing, or a digital scan of a paper drawing, straight into a usable CAD drawing. There has been  some discussion of this on this forum, and the outcome seems to be that there is, as yet, no reliable way of making a straightforward conversion, despite some programmes claiming to do this. 

 

All the best,

 

Mark P

 

 

[helge]

On 12/9/2020 at 5:15 PM, helge said:

hello,can somebody transfer a paper work drawing of a 1700-1800 frigate to a cad program for cutting parts for me. Cost?

 

rgds Helge,norway

Thanks for the answers.

[AON]

I assume you haven't used any CAD program yourself.

 

Prior to someone offering to do work for any compensation they would need to see the drawing(s) to appreciate the enormity of the task to be done.

Having done engineering drawings for clients for well over 30 years I can attest to having experienced the "what the client said. what the engineer heard.  what the client wanted" phenomenon.  It should be avoided or there will be a great disappointment for both parties.

 

Mark is correct in the steps to do the work.

 

Can you post photos of the drawing(s) you would like converted?

[Wahka_est]

Scanned drawings can be used base for dwgs and then its just time. Agree with AON-need to see drawing first.

After seeing that maybe i can help.

 

Vahur

[helge]

On 12/13/2020 at 4:55 PM, AON said:

I assume you haven't used any CAD program yourself.

 

Prior to someone offering to do work for any compensation they would need to see the drawing(s) to appreciate the enormity of the task to be done.

Having done engineering drawings for clients for well over 30 years I can attest to having experienced the "what the client said. what the engineer heard.  what the client wanted" phenomenon.  It should be avoided or there will be a great disappointment for both parties.

 

Mark is correct in the steps to do the work.

 

Can you post photos of the drawing(s) you would like converted?

yes I have some photo of the drawing,I buy from nmm in london,sorry for the late replay.

helge

[AON]

I am making sawdust at the moment.

Will have a closer look in an hour or two.

Possibly Vahur will respond also.

Edited December 21, 2020 by AON

[helge]

On 12/13/2020 at 4:55 PM, AON said:

I assume you haven't used any CAD program yourself.

 

Prior to someone offering to do work for any compensation they would need to see the drawing(s) to appreciate the enormity of the task to be done.

Having done engineering drawings for clients for well over 30 years I can attest to having experienced the "what the client said. what the engineer heard.  what the client wanted" phenomenon.  It should be avoided or there will be a great disappointment for both parties.

 

Mark is correct in the steps to do the work.

 

Can you post photos of the drawing(s) you would like converted?

 

On 12/15/2020 at 7:49 PM, Wahka_est said:

Scanned drawings can be used base for dwgs and then its just time. Agree with AON-need to see drawing first.

After seeing that maybe i can help.

 

Vahur

ok,here are some photos of the drawings I buy at nmm in london,and sorry for the late replay.

helge

[Wahka_est]

Hi,

 

The drawings itself shouldnt take more than few days.

Only question is how good are scanned documents and what precision is needed.

What parts would you like to cut - bulkheads?

 

Do you also need exact locations of chainplates, quater galleries also?

 

[helge]

Yes ,bulkheads ,keel,stem,stern post,quarter galleries,stern galleries,bowrails,rudder, gunnport pattern,(inner and outer),gunndeck,quarterdeck (toppdeck) etc. No need the exact locations of chainplates. I have papir drawings that is veary clear,the only problem is that the drawings are in the uk for the moment,with a designer company that will give me a quote,I have also  an contact with another  member that can help me. I have to 

see what I will do.Can you estimate some cost. The photos is downloaded from nmm website,and I dont know if you can use these photos if I give you the mesurements?

 

helge,norway

 

 

 

[Egilman]

On 12/21/2020 at 2:40 AM, helge said:

I dont know if you can use these photos if I give you the mesurements?

Probably not, they are very small, low resolution images... (probably 72 DPI) way too small to digitally redraw....

 

Most cad transfers are done at 1-1 scale, it is much easier to do that way..... The Best software for doing this is Autodesk's Raster Design, (an add on to autocad) It's designed to take existing scanned paper drawing images and convert them into cad drawings.... Been in used for several years now and has all the tools needed to take out any scanner distortion that is added to the drawings in the conversion process, and yes there will be distortions...... Happens to all scanned drawings.... It is still a trace over process though, just that Raster Design is intended to make the process as painless and easy as possible......

[Dane]

You can trace any drawing with tracing software but the question is if  the projections of the drawing are consistent with each other?
To verify it you should use shipbuilding software anyway, like DelftShip for example. If the drawing includes digital data your task will be easier.