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Scale Drawing enlargement

Biged4412

Entry posted by Biged4412

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Hi everyone

 

I've recently come aquired some scale Plans for locomotives and coaches. Unfortunately they are in the wrong scale does anybody know of any software or company's in the East Yorkshire area that could enlarge and or reduce these for me

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  • RMweb Gold
Huw Griffiths
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When I've needed to enlarge drawings (from a published diagram book, in my case), I've just scanned the relevant drawings into my PC - and rotated, enlarged, or otherwise adjusted the files using an old version of PhotoShop.

 

Although I can't be certain, I suspect that a number of other image manipulation packages (eg The Gimp) would probably offer similar features to these.

 

Depending on the size of your drawings, you might also be able to rescale them using a photocopier (perhaps set to print at A3 size - try checking your local library, or even one of those shops that print pamphlets and business cards while you wait).

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Biged4412

Hi huw

 

When doing it on photo shop did it give you the exact scale? And which generation of photoshop did you use?

 

Thanks

 

Ed

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  • RMweb Premium
KH1
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Just scan them in at the highest resolution you can then do a little bit of maths to establish the ratio between the scale you have and the scale you want and then adjust the resolution by this amount making sure 'resample image' is ticked. Any version of PhotoShop or any half decent package will do this.

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Brassey

When scaling in Photoshop, I have drawn and added over the scan a straight line of something I knew the exact dimension of, such as the wheelbase.  I did this in Illustrator and that allows you to set that line at a precise figure in mm such as 34mm.  I've then scaled the scanned drawing to fit exactly the drawn line.

 

You can save the scanned image without the line and print it out.  I have used Photoshop professionally and have the full Adobe Suite which includes Illustrator.  You can probably drawn lines in Gimp too but whether you can dimension them is another matter.

 

I have an example but can't post here in comments so will stick it on my blog.

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