The New Hotness

For reasons not relevant here, I made replacement pegs for the Shuttles board game:

Shuttles Game - solid model - Slic3r — Shuttles Game – solid model – Slic3r

Not the most challenging solid model I’ve ever conjured from the vasty digital deep, but 3D printing is really good for stuff like this.

The OEM pegs have a hollow center, most likely to simplify stripping them from the injection mold, which I dutifully duplicated:

Shuttles Game pegs - hollow - solid model — Shuttles Game pegs – hollow – solid model

It turns out the additional perimeter length inside the pegs requires 50% more printing time, far offsetting the reduced 10% infill. Given that each solid set takes just under an hour, I decided to lose half an hour of verisimilitude.

I plunked a nice round cap atop the OEM peg’s flat end, but stopped short of printing & installing a round plug for the butt end.

While the 3D printer’s hot, ya may as well make a bunch:

Game on …

The OpenSCAD source code as a GitHub Gist:

Update: They’re a bit too large, so the Gist now produces tapered pegs.

	// Shuttles game pegs
	// Ed Nisley KE4ZNU – July 2020

	/* [Layout Options] */

	Layout = "Peg"; // [Build, Peg]

	Hollow = false;

	//——-
	//- Extrusion parameters must match reality!

	/* [Hidden] */

	ThreadThick = 0.25;
	ThreadWidth = 0.40;

	HoleWindage = 0.2;

	Protrusion = 0.1; // make holes end cleanly

	ID = 0;
	OD = 1;
	LENGTH = 2;

	//——-
	// Dimensions

	/* [Dimensions] */

	Peg = [4.0,7.5,26.0]; // overall length, including the rounded Cap

	Taper = 1.0;

	CapRadius = Peg[OD]/2;
	PegBaseLength = Peg[LENGTH] – CapRadius;

	NumPegs = [1,6]; // lay out in array

	ArrayCenter = [NumPegs[0] – 1,NumPegs[1] – 1] / 2;

	NumSides = 6*4;


	//——-

	module PolyCyl(Dia,Height,ForceSides=0) { // based on nophead's polyholes
	Sides = (ForceSides != 0) ? ForceSides : (ceil(Dia) + 2);
	FixDia = Dia / cos(180/Sides);
	cylinder(r=FixDia/2 + HoleWindage,h=Height,$fn=Sides);
	}


	//——-
	// One peg

	module Peg() {

	union() {
	translate([0,0,PegBaseLength])
	difference() {
	sphere(d=Peg[OD],$fn=NumSides);
	translate([0,0,-Peg[OD]/2])
	cube([2Peg[OD],2Peg[OD],Peg[OD]],center=true);
	}
	difference() {
	cylinder(d1=Peg[OD] – Taper,d2=Peg[OD],h=PegBaseLength,$fn=NumSides);
	if (Hollow)
	translate([0,0,-Protrusion])
	PolyCyl(Peg[ID],PegBaseLength+Protrusion,NumSides);
	}
	}
	}

	//——-
	// Build it!

	if (Layout == "Peg")
	Peg();


	if (Layout == "Build")
	for (i=[0:NumPegs[0] – 1], j=[0:NumPegs[1] – 1])
	translate([(i – ArrayCenter.x)1.5Peg[OD],(j – ArrayCenter.y)1.5Peg[OD],0])
	Peg();

view raw Shuttles Game.scad hosted with ❤ by GitHub

The New Hotness

Shuttles Board Game: Replacement Pegs