I use openSCAD, do a projection, export to SVG and upload to Glowforge. If I make a rectangle 25.4 x 50.8 I expect to get something that is 1 x 2 inches when cut, but it is WAY smaller. In order to get things to come out right I have to use 95.62 units in OpenSCAD to get an inch in Glowforge. (this was determined by printing out rulers and measuring the distance between ticks)
I took the SVG file and opened it in inkscape and got exactly the dimensions as shown in OpenSCAD, but when cut with the Glowforge, they are almost 4 times smaller.
Is there some really strange conversion factor being applied to an SVG from OpenSCAD?
I’m using Glowforge to make engineering devices and I need them to fit to fairly close tolerances, this bizarre conversion just doesn’t seem right.
Other people seem to get OpenSCAD to cut properly so it must be something I’m doing wrong, but I don’t know what it is.