hey all.
i am printing some cubes this afternoon on account of a couple parts this weekend printing too large.
i’ve printed a 15mm cube and while it is 14.999 - 14.87mm in the z direction (measuring in the middle of the cube yields smaller numbers, and measuring transverse vertexes gives 14.98mm or so 
), the x and y dimensions are ~15.55 (at the bottom-most layers) and ~15.25mm in the center and top most layers of the cube. i am using these calipers:http://www.amazon.com/Stainless-Digital-Fractions-Conversion-446/dp/B000YFT0A2
i am printing a few more different sized cubes at the moment.
i am printing natural 3mm lulzbot abs, 230 hot end and 85 bed with an abs/acetone layer on the bed.
here is that 15mm cube’s gcode.
i can understand how the bottom couple layers could be squished out a bit, and can visibly see the wider layers at the bottom.
these measurements aren’t off that much but i am trying to snap fit a few parts and just working on gauging where my machine is.
15mm_cube.gcode (110 KB)