This very much sounds like a bug in your 3D printer firmware or slicer settings. I've experienced this before, where the calibration cubes looked ok, but printing something larger made the dimensional error noticeable. In my case, the 3D printer I tested wasn't open source so I had to work around it by scaling. I would recommend finding other owners of the printer in question, or discuss this with the vendor tech support. Feel free to drop a note here if you figured it out, so others can learn from your experiences. -Marius -- View this message in context: http://forum.openscad.org/Scaling-and-3D-Printing-Questions-tp17161p17163.html Sent from the OpenSCAD mailing list archive at Nabble.com.

scale(0.985) cube([60, 90, 7]); When exported to NetFabb gives Length: 59.1mm, Width: 88.65mm, Height: 6.89mm as expected, so I don't know how you got the figures you reported. On 20 April 2016 at 14:54, kintel <marius@kintel.net> wrote: > This very much sounds like a bug in your 3D printer firmware or slicer > settings. > I've experienced this before, where the calibration cubes looked ok, but > printing something larger made the dimensional error noticeable. In my > case, > the 3D printer I tested wasn't open source so I had to work around it by > scaling. I would recommend finding other owners of the printer in question, > or discuss this with the vendor tech support. > Feel free to drop a note here if you figured it out, so others can learn > from your experiences. > > -Marius > > > > -- > View this message in context: > http://forum.openscad.org/Scaling-and-3D-Printing-Questions-tp17161p17163.html > Sent from the OpenSCAD mailing list archive at Nabble.com. > > _______________________________________________ > OpenSCAD mailing list > Discuss@lists.openscad.org > http://lists.openscad.org/mailman/listinfo/discuss_lists.openscad.org >