Best metric scale ruler pdf#
All copies of drawings created or modified by printing (as distinct from plotting), photocopying, faxing, or turning into a PDF almost certainly are not accurate. While most original plots from a CAD file should be accurate (though human mistakes can and do happen), anything which has been plotted to "fit" the sheet of paper, rather than to a specific scale, is likely to be mis-scaled. This can be done by checking the measurement of a dimensioned object or an object of known size.ĭrawings can be inaccurate due to any form of copying or processing. Make sure all construction drawings are printed out so that 1 unit of the printed document equals 1 unit of the original drawing.
You should always check that the document was printed out accurately before making measurements and conversions. So, not only should you verify the scale of the drawing, but you should verify its accuracy. Real Size Online Ruler This virtual ruler that can be adjusted to true size, that can actually measure the actual length, the upper half is metric ruler (millimetre and centimetre), lower half is inches ruler, before you use this ruler, please set the pixels per inch to your own device. The printer may rescale the image to fit the different sized paper, which will result in an inaccurate print-out.Īll of your measurements taken from these printed copies would be incorrect. Letter sized paper that is 8.5 inches x 11 inches (216 mm x 279 mm) and tried to print it on metric A4 paper that is 210 mm x 297 mm (8.27 inches x 11.7 inches).
Also, check that the printed physical scale of the drawing is correct.Ĭonsider what would happen if you took a drawing that is the correct scale on a piece of U.S.
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