Modified Secret Heart Box

A slight modification from the Secret Heart Box adding a shelf along the inside of the cleave line on the top layer. This avoids the problem of filaments pulling the edge out of shape if the first fill is anything other than in the X direction.

My worst problem for the original Secret Heart box was in the bridging for the top piece. It appears that many are printing with PLA and with aggressive cooling that seems to work really well. I wanted to get ABS to work, and the one remaining problem was the ABS strand along the cleave line for both the upper sections and lower sections would get stretched by the first layer fill. One solution is obviously to use a slicer that does the top fill along the Y and X axis (as emmett's shows). However, the slicer I've been using insists on doing a 45 degree top fill and that would drag the filament along the cleave line out of sorts.

Having to pick and choose slicers just rankles with so many builds, so instead I added a small shelf along the inside top cleave line that allows the top layer to fill in any direction as it's hardened enough by the time the fill layer is required. That worked great! No supports required.

It's the first time I'd seen or used SCAD and I was blown away by emmett's ingenuity and clear spatial reasoning.