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Print true to scale

jochen_ritterjochen_ritter Member, csevp Posts: 7 PRO
Hello!

Our CNC-Mill is broken right now, so i wanted to manufacture a small bracket per drawing paper print, glueing it to the material and doing it the old way.

I discovered now, that even with the print option "no size change" and with 100% scale, the printing is not true to scale, but loses ~3% size. Tested this with the onshape-generated pdf in chrome and in pdf xchange.

When i measure in the pdf draweing with the tools of pdf xchange, the numbers are correct. But it doesnt print correct.

Does anybody have an idea?


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Answers

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    martin_kopplowmartin_kopplow Member Posts: 363 PRO
    No other idea than printing it out in 103% resp. 97% or so to compensate. It should not happen in the first place, and I just tried with my setup (Win/Firefox/Adobe Acrobat/HP LaserJet): In my case it does not happen. I get an error of less than a line width for a 100x200mm slab I test printed on A4, which is within reasonable tolerances. Maybe there is some setting in your workflow that assumes someting. In one printer driver I have on a laptop, for example, "print at original size" is not necessarily equal to "print at 100% scale". You may want to try and see if it makes any difference.
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    jochen_ritterjochen_ritter Member, csevp Posts: 7 PRO
    Update:

    I tested it on the same pc with another printer, a Ricoh SP213W. This one gives me a print with a size of roughly 100.6 %..... so, a small error but still enough at lager parts.

    So i suppose the error must be on the printer driver side.

    I will search for settings in the drivers later.
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    nick_papageorge073nick_papageorge073 Member, csevp Posts: 726 PRO
    I had a similar issue a while back (while doing the exact same thing, adhering the printout on a piece of sheetmetal to cut on the bandsaw).

    I traced it to two things in my case:

    On my computer, if I had "full scale" selected in the printer dialog box, it would be off slightly. However, if I hand typed in "100%", it would be accurate.

    The second was I was using a browser to open the pdf and print from it. I forgot which browser now, but one browser was printing precisely, and the second was not.


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    Ste_WilsonSte_Wilson Member Posts: 254 EDU
    edited June 5
    However, if I hand typed in "100%", it would be accurate.

    That's madness! :smile:

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    jochen_ritterjochen_ritter Member, csevp Posts: 7 PRO
    I didn´t write it accurate enough, but thats what i meant with '"100% scale" in my first post. I tested the full scale  option and the manual 100% option.
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