Rattling Issue

Tool Path for Reprap Endstop

The green pattern in the picture above made my Reprap Prusa printer rattle like crazy, but it didn't ruin the print. The tool path above is the result of rotating the part 90° on the Z axis, so it wasn't originally supposed to print this way. Actually, there's less rattling when the green zig-zags go up and down the Y-Axis instead of the X axis. This is probably because the Reprap is weaker when rattled in the X direction.

It would be interesting to see Slic3r rotate parts to avoid patterns like the one in the picture above. An user named tjhowse on the Reprap IRC put the idea of "optimal rotation" this way, 'minimize the occurrences of toolpaths that induce resonance in the machine'. I'll need to do more to compare quality and noise generated when parts are printed with the pattern above, and from when that pattern is rotated.