I’ve been slowly working on the design of a printable (and fully MakerBottable) sonic screwdriver. This model of the sonic screwdriver is built up of a number of concentric cylinders, has several significant overhangs well in excess of 45 degrees, and is larger than the MakerBot’s built capacity. In order to deal with these design problems, I modeled it in sections.
In order to make the overall result something I could just pop/snap/slide together I designed it making some sections which were split vertically and other sections which slide around those sections to keep them together. In order to make the parts quickly printable I designed all the parts at around 0.5mm thickness.
About 40% of the way through the print one of the vertical sections wasn’t coming out properly – probably because it was too thin. The parts were too thin and flexible and ended up tearing between layers and just being too flimsy.
I also noticed something odd – the extrusion was too thin on that side of the model. I can’t be sure why this is happening – but I suspect it’s due to the extruder not getting a good enough grip. Perhaps I need to floss the extruder pulley or install a new extruder idler wheel. However, it doesn’t explain why the extrusion was too thin on just that one side and no other spots.