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Ok, re-looked at my equation and I'm still happy with it. Regarding your statement, yeah, the height will go down but if you start with a tall skinny image even after shrinking it down to the desired width it might still be too tall for the glass.

And you somehow expect less? We do the best to come up with the simple solution. Lol, big time!

No, the height goes down. I think we are all going crazy. Lol.

WOW!!!!!! Ya'll are going DEEP................... I just add about 12% to the width when I'm dealing with a shape and I've never had a customer complain.

I have changed the calculations in my post. Thanks to darcshadow for the input and his calculations. Hopefully, one way or the other you will be able to work it out.

Actually, it is a 14.5% shrink in the height. That would get our numbers a LOT closer than the subtraction. As in the same numbers.

Good point. So I just need to change the last part so it is a percentage instead of a distance. Makes sense. Then we can rewrite it so it is simple for anyone to calculate.

The problem with just subtracting is it is only correct if your design has equal height and width. If for example the design in your example was only 0.41" tall to start with now it's height is 0. The correct height for the new width should be 0.35. You need to shrink the height by the same percentage as the apparent width shrank. So in your example the actual width is 2.83, the perceived width is 2.42 so that a change of 85.5%. So shrink the height by the same percentage and the image should then look correctly, when viewed straight on.

Ok, here goes. This is written in the sequence you would put into the windows calculator. Let’s say you are putting a graphic on a beer mug with no taper. The beer mug has a dia of 3 inches. You are planning on 30% coverage. So… 360 X 30% gives you 108 degrees coverage. (Do not hit enter after the %) Then you want 108 divided by 360 giving you .3 (remember that) Now you want to multiply pi X 3 giving you 9.42 (pi X dia of mug) (pi=3.14 aprox) Then .3 X 9.42 will give you 2.83. That will be the width of your design. Scale you design (height and width locked) to that width and save that number. That unfortunately will give you a design that looks taller (or narrower) than you want. To fix that, we can figure out what the design should be changed to. You need to divide your angle by 2 giving you 54. In the windows scientific calculator punch this in. 54sin X 3 That will give you 2.42. That is what the design will actually look like for width. So, take your first number and subtract the second number. 2.83 – 2.42=.41 Then calculate the percentage. .41/2.83 X 100 = 14.5% Subtract 14.5% from the height of your design without changing the width. Close to what darcshadow said with way more detail that may not be needed. You can change your numbers (dia and% of coverage) to reflect what you are actually designing.

The plotter will NOT show up in your device screen. The USB device that you install is a comm port not a printer/plotter. Look in your comm port listings and you should see your new comm port. Plug your null modem cable into your adapter and point your software to the comm port number that you see in device manager and you should be good to go. Some software limits the comm port numbers you can use so you might need to change the comm port number through the device manager page.