Lego Train Motor Assembly

script

let motor = microGearMotor({ shaftDiameter: 3.1 }).as('motor');
let rear = cube(3.2 * 4, 16 - 0.2, 15 - 0.2).translate(0).as('rear');
let studSheet = readShape({ path: 'studs3' }, () => lego.studSheet({ width: 16 - 0.2, length: 32 - 0.2 }));
let socketSheet = readShape({ path: 'sockets4' }, () => lego.socketSheet({ width: 16 - 0.2, length: 32 - 0.2, studDiameter: 5.1, play: 0 }));
let bevelGear = readShape({ path: 'bevelGear' }, () => readLDraw({ part: '6589.dat' }));

let gear = assemble(bevelGear.rotateX(90).translate(0, 0, -1),
                                 cylinder(4, 8).translate(0, 0, 0))
                  .translate(0, 0, 8 * 3)
                  .as('gear');

let sheet = assemble(
      studSheet,
      socketSheet.drop('void').translate(0, 0, -1.6))
    .rotateY(90)
    .translate(5.5);

let thing = assemble(rear, sheet, gear, motor);

thing.drop('motor', 'void', 'gear').writeStl({ path: 'rear2.stl', disjoint: false });
thing.keep('gear').center().writeStl({ path: 'gear2.stl', disjoint: false });

undefined;