80-20-rail

// 80/20 Rail
// An 80/20 extruded aluminum linear rail. T-slot profile adjustable by profile height, rail length, and origin position


// Define function
fn rail8020(originStart, railHeight, railLength) {
  // Sketch side 1 of profile
  sketch001 = startSketchOn('-XZ')
    |> startProfileAt([
         originStart[0],
         0.1 * railHeight + originStart[1]
       ], %)
    |> arc({
         angleStart = 180,
         angleEnd = 270,
         radius = 0.1 * railHeight
       }, %)
    |> arc({
         angleStart = 180,
         angleEnd = 0,
         radius = 0.072 / 4 * railHeight
       }, %)
    |> xLine(0.1 * railHeight, %)
    |> arc({
         angleStart = 180,
         angleEnd = 0,
         radius = 0.072 / 4 * railHeight
       }, %)
    |> xLine(0.06 * railHeight, %, $edge1)
    |> yLine(0.087 * railHeight, %, $edge2)
    |> xLine(-0.183 * railHeight, %, $edge3)
    |> angledLineToY({
         angle = 45,
         to = (1 - 0.356) / 2 * railHeight + originStart[1]
       }, %, $edge4)
    |> xLine(0.232 * railHeight, %, $edge5)
    |> angledLineToY({
         angle = -45,
         to = 0.087 * railHeight + originStart[1]
       }, %, $edge6)
    |> xLine(-0.183 * railHeight, %, $edge7)
    |> yLine(-0.087 * railHeight, %, $edge8)
    |> xLine(0.06 * railHeight, %)
    |> arc({
         angleStart = 180,
         angleEnd = 0,
         radius = 0.072 / 4 * railHeight
       }, %)
    |> xLine(0.1 * railHeight, %)
    |> arc({
         angleStart = 180,
         angleEnd = 0,
         radius = 0.072 / 4 * railHeight
       }, %)
    |> arc({
         angleStart = -90,
         angleEnd = 0,
         radius = 0.1 * railHeight
       }, %)

    // Sketch side 2 of profile
    |> arc({
         angleStart = 270,
         angleEnd = 90,
         radius = 0.072 / 4 * railHeight
       }, %)
    |> yLine(0.1 * railHeight, %)
    |> arc({
         angleStart = 270,
         angleEnd = 90,
         radius = 0.072 / 4 * railHeight
       }, %)
    |> yLine(0.06 * railHeight, %, $edge9)
    |> xLine(-0.087 * railHeight, %, $edge10)
    |> yLine(-0.183 * railHeight, %, $edge11) // edge11
    |> angledLineToX({
         angle = 135,
         to = ((1 - 0.356) / 2 + 0.356) * railHeight + originStart[0]
       }, %, $edge12) // edge12
    |> yLine(0.232 * railHeight, %, $edge13) // 13
    |> angledLineToX({
         angle = 45,
         to = (1 - 0.087) * railHeight + originStart[0]
       }, %, $edge14) // 14
    |> yLine(-0.183 * railHeight, %, $edge15) // 15
    |> xLine(0.087 * railHeight, %, $edge16)
    |> yLine(0.06 * railHeight, %)
    |> arc({
         angleStart = 270,
         angleEnd = 90,
         radius = 0.072 / 4 * railHeight
       }, %)
    |> yLine(0.1 * railHeight, %)
    |> arc({
         angleStart = 270,
         angleEnd = 90,
         radius = 0.072 / 4 * railHeight
       }, %)

    // Sketch side 3 of profile
    |> arc({
         angleStart = 0,
         angleEnd = 90,
         radius = 0.1 * railHeight
       }, %)
    |> arc({
         angleStart = 0,
         angleEnd = -180,
         radius = 0.072 / 4 * railHeight
       }, %)
    |> xLine(-0.1 * railHeight, %)
    |> arc({
         angleStart = 0,
         angleEnd = -180,
         radius = 0.072 / 4 * railHeight
       }, %)
    |> xLine(-0.06 * railHeight, %, $edge17)
    |> yLine(-0.087 * railHeight, %, $edge18)
    |> xLine(0.183 * railHeight, %, $edge19)
    |> angledLineToY({
         angle = 45,
         to = ((1 - 0.356) / 2 + 0.356) * railHeight + originStart[1]
       }, %, $edge20)
    |> xLine(-0.232 * railHeight, %, $edge21)
    |> angledLineToY({
         angle = 135,
         to = (1 - 0.087) * railHeight + originStart[1]
       }, %, $edge22)
    |> xLine(0.183 * railHeight, %, $edge23)
    |> yLine(0.087 * railHeight, %, $edge24)
    |> xLine(-0.06 * railHeight, %)
    |> arc({
         angleStart = 0,
         angleEnd = -180,
         radius = 0.072 / 4 * railHeight
       }, %)
    |> xLine(-0.1 * railHeight, %)
    |> arc({
         angleStart = 0,
         angleEnd = -180,
         radius = 0.072 / 4 * railHeight
       }, %)
    |> arc({
         angleStart = 90,
         angleEnd = 180,
         radius = 0.1 * railHeight
       }, %)

    // Sketch side 4 of profile
    |> arc({
         angleStart = 90,
         angleEnd = -90,
         radius = 0.072 / 4 * railHeight
       }, %)
    |> yLine(-0.1 * railHeight, %)
    |> arc({
         angleStart = 90,
         angleEnd = -90,
         radius = 0.072 / 4 * railHeight
       }, %)
    |> yLine(-0.06 * railHeight, %, $edge25)
    |> xLine(0.087 * railHeight, %, $edge26)
    |> yLine(0.183 * railHeight, %, $edge27)
    |> angledLineToX({
         angle = 135,
         to = (1 - 0.356) / 2 * railHeight + originStart[0]
       }, %, $edge28)
    |> yLine(-0.232 * railHeight, %, $edge29)
    |> angledLineToX({
         angle = 45,
         to = 0.087 * railHeight + originStart[0]
       }, %, $edge30)
    |> yLine(0.183 * railHeight, %, $edge31)
    |> xLine(-0.087 * railHeight, %, $edge32)
    |> yLine(-0.06 * railHeight, %)
    |> arc({
         angleStart = 90,
         angleEnd = -90,
         radius = 0.072 / 4 * railHeight
       }, %)
    |> yLine(-0.1 * railHeight, %)
    |> arc({
         angleStart = 90,
         angleEnd = -90,
         radius = 0.072 / 4 * railHeight
       }, %)
    |> close(%)

    // Sketch center hole of profile
    |> hole(circle({
         center = [
           .5 * railHeight + originStart[0],
           .5 * railHeight + originStart[1]
         ],
         radius = .205 * railHeight / 2
       }, %), %)
    |> extrude(railLength, %)
    |> fillet({
         radius = 0.06,
         tags = [
           getNextAdjacentEdge(edge3),
           getNextAdjacentEdge(edge4),
           getNextAdjacentEdge(edge5),
           getNextAdjacentEdge(edge6),
           getNextAdjacentEdge(edge11),
           getNextAdjacentEdge(edge12),
           getNextAdjacentEdge(edge13),
           getNextAdjacentEdge(edge14),
           getNextAdjacentEdge(edge19),
           getNextAdjacentEdge(edge20),
           getNextAdjacentEdge(edge21),
           getNextAdjacentEdge(edge22),
           getNextAdjacentEdge(edge27),
           getNextAdjacentEdge(edge28),
           getNextAdjacentEdge(edge29),
           getNextAdjacentEdge(edge30)
         ]
       }, %)
    |> fillet({
         radius = 0.03,
         tags = [
           getNextAdjacentEdge(edge1),
           getNextAdjacentEdge(edge2),
           getNextAdjacentEdge(edge7),
           getNextAdjacentEdge(edge8),
           getNextAdjacentEdge(edge9),
           getNextAdjacentEdge(edge10),
           getNextAdjacentEdge(edge15),
           getNextAdjacentEdge(edge16),
           getNextAdjacentEdge(edge17),
           getNextAdjacentEdge(edge18),
           getNextAdjacentEdge(edge23),
           getNextAdjacentEdge(edge24),
           getNextAdjacentEdge(edge25),
           getNextAdjacentEdge(edge26),
           getNextAdjacentEdge(edge31),
           getNextAdjacentEdge(edge32)
         ]
       }, %)
  return sketch001
}

// Generate one adjustable rail of 80/20
rail8020([0, 0], 1.5, 48)