Scale as a Percentage

[kelticsylk]

I trying to figure out how to reduce a full size CAD drawing to N scale. The particular program I'm using to rescale doesn't seem to like the decimal equivalent of 1/160 or 0.00625. If I use a percentage figure how would I calculate that? Is it 100/160? That's 0.625%

I entered the size it should be in N scale and the program tells me the percentage is 7.55. I just understand how you arrive at that figure. I suck at mathematics

[pnolan48]

You got the math right, so I'm presuming your software doesn't have the correct range. Try reducing it to 10% of original, save it, then reduce the saved drawing by 62.5%. I hope my math is correct.

[Chris333]

Since I am dumb as well  I'd sometimes draw a box around it and measure one side. Now put a mark where that line would end in N scale. And just resize it to that mark.

[kelticsylk]

Didn't work out anyway. I got the model scaled down and uploaded it to Shapeways. They processed it and half the model is missing. Back to the drawing board.

[peteski]

Didn't work out anyway. I got the model scaled down and uploaded it to Shapeways. They processed it and half the model is missing. Back to the drawing board.

Unfortunately, for several reasons, designing a printable CAD model for Shapeways is not as easy as simply shrinking a 1:1 drawing of the real thing.