.. lathe mfiles utilitysubs arc1.ngc arc1.png arc2.ngc arc2.png backlash.ngc db25.ngc gosper.ngc gosper.png helix.ngc helix_rtheta.ngc hole_circle.ngc ihex.ngc iquad.ngc iquad.png ohex.ngc oquad.ngc qpex.ngc qpex_mm.ngc qpocket.ngc qpocket.png rectangle_probe.ngc simp.ngc simp.png slot.ngc slot.png xyz.ngc xyz.png