I’m new to the forum and 3D printing in general. I’m trying to get my lulzbot mini setup as best I can to make some cylindrical parts and I’m having problems with circularity and concentricity. When my model is a cylinder I wind up with something that is more like an ellipse at some locations. I believe that it corresponds with the two locations where the print head tends to reverse direction during printing. As a result I’m getting poor lateral adhesion within the layer simply because the bead is spaced too far out from the one next to it.
I printed this calibration model http://www.thingiverse.com/thing:24238/#files and it came out looking good using the standard HIPS profile in CURA. You’ll see it on the left in the image below.
When I print a cylindrical model I wind up with stuff like what you see in the following image. http://tinypic.com/r/5wys5j/8
Has anyone else encountered, and hopefully solved, this issue? Any assistance is much appreciated!