train carousel

model.jscd

function main(params) {
    return union(
      CSG.cylinder({start:[0,-75,0], end:[0,-74,0], radius: 30, resolution:36}),
      CSG.cylinder({start:[0,-83,0], end:[0,90,0], radius: 2, resolution:36}),
      shifter().translate([0, -80, 0]),
      ball_bearing().translate([0, -80.5, 0]),
      ball_bearing().translate([0, 80.5, 0]),
      ball_bearing().translate([0, 83.5, 0]),
      ball_bearing().translate([0, -84.5, -10]),
      CSG.cylinder({start:[0,-90,0], end:[0,-80,0], radius: 2, resolution:36}).translate([0, 0, -10]),
      CSG.cylinder({start:[0,75,0], end:[0,74,0], radius: 30, resolution:36}),

      train_support(0),
      train_support(90),
      train_support(180),
      train_support(270),
      CSG.cylinder({start:[0,-85,-10], end:[0,-84, -10], radius: 30, resolution:36}).setColor(.5,.5,.5,.5),
      cube(size=[8, 4, 49]).translate([-4, 80, -45]),
      cube(size=[8, 4, 39]).translate([-4, -93, -45])
    ).translate([0, 0, 45]);

}

function ball_bearing() {
  return CSG.cylinder({start:[0,-1.2,0], end:[0,1.2,0], radius: 2.8, resolution:36}).setColor([0, 0, 1])
}

function shifter() {
  return linear_extrude({ height: 1 }, hull( circle(4),circle(4).translate([0,10,0]))).rotateZ(90).rotateX(90).translate([14, 0, -4]).setColor(0, 1, 0).rotateY(90);
}

function train_support(v) {
  return union(
    CSG.cylinder({start:[0,-80,0], end:[0,76,0], radius: 1, resolution:36}),
    shifter().translate([0, -80, 0]),
    CSG.cylinder({start:[0,-86,0], end:[0,-80,0], radius: 1, resolution:36}).translate([0, 0, -10]),
    ball_bearing().translate([0, -84.5, -10]),
    ball_bearing().translate([0, -74.5, 0]),
    ball_bearing().translate([0, 74.5, 0])
  ).translate([25 * cos(v), 0, 25 * sin(v)])
}