The Smell of Molten Projects in the Morning

Ed Nisley's Blog: Shop notes, electronics, firmware, machinery, 3D printing, laser cuttery, and curiosities. Contents: 100% human thinking, 0% AI slop.

The New Hotness

  • Garden Knife Sheath

    This replaces the transparent acrylic version that’s sure to resurface in the garden:

    Garden Knife Sheath - solid model
    Garden Knife Sheath – solid model

    The ends have nice chamfered entrances made from octagons:

    Garden Knife Sheath - entrances - solid model
    Garden Knife Sheath – entrances – solid model

    The thing went away so fast I didn’t get a chance to photograph it, but magenta PETG filament should make it much harder to mislay, out there among the greenery…

    The OpenSCAD source code:

    // Garden Knife Scabbard
    // Ed Nisley KE4ZNU - August 2015
    
    //- Extrusion parameters - must match reality!
    
    ThreadThick = 0.25;
    ThreadWidth = 0.40;
    
    function IntegerMultiple(Size,Unit) = Unit * ceil(Size / Unit);
    
    Protrusion = 0.1;
    
    HoleWindage = 0.2;
    
    //------
    // Dimensions
    
    WallThick = IntegerMultiple(3.0,ThreadWidth);
    
    Blade = [115,1.8,16.0];
    
    Clearance = [10.0,2.0,2.0];
    
    Slot = Blade + Clearance;
    
    Sheath = Slot + [0,2*WallThick,2*WallThick];
    
    //- Build it
    
    
    translate([0,0,Sheath[2]/2])
        difference() {
            union() {
                for (i=[-1,1])
                    translate([i*Sheath[0]/2,0,-Sheath[2]/2])
                        rotate(180/32)
                            cylinder(d=Sheath[1],h=Sheath[2],$fn=32);
                cube(Sheath,center=true);
            }
            cube(Slot + [Slot[0],0,0],center=true);
            for (i=[-1,1])
                translate([i*(Sheath[0]/2 + Sheath[1]/2),0,-Slot[2]/2])
                    rotate(180/8)
                        cylinder(d=Sheath[1] - 4*ThreadWidth,h=Slot[2],$fn=8);
        }