wheel-rotor

// Wheel rotor
// A component of a disc brake system. It provides a surface for brake pads to press against, generating the friction needed to slow or stop the vehicle.


// Define constants
// Base units for this model are in inches
rotorDiameter = 12
rotorInnerDiameter = 6
rotorSinglePlateThickness = 0.25
rotorInnerDiameterThickness = 0.5
lugHolePatternDia = 3
lugSpacing = 114.3 * mm()
rotorTotalThickness = 1
spacerPatternDiameter = 11
spacerDiameter = 0.25
spacerLength = rotorTotalThickness - (2 * rotorSinglePlateThickness)
spacerCount = 16
wheelDiameter = 19
lugCount = 5
yAxisOffset = 0.5
drillAndSlotCount = 5

rotorPlane = {
  plane: {
    origin: { x: 0, y: yAxisOffset, z: 0 },
    xAxis: { x: -1, y: 0, z: 0 },
    yAxis: { x: 0, y: 0, z: 1 },
    zAxis: { x: 0, y: 1, z: 0 }
  }
}

fn lugPattern = (plane) => {
  lugHolePattern = circle({
         center: [-lugSpacing / 2, 0],
         radius: 0.315
       }, plane)
    |> patternCircular2d({
         arcDegrees: 360,
         center: [0, 0],
         instances: lugCount,
         rotateDuplicates: true
       }, %)
  return lugHolePattern
}

rotorSketch = startSketchOn(rotorPlane)
  |> circle({
       center: [0, 0],
       radius: rotorDiameter / 2
     }, %)
  |> hole(lugPattern(%), %)
rotor = extrude(rotorSinglePlateThickness, rotorSketch)

rotorBumpSketch = startSketchOn(rotorPlane)
  |> circle({
       center: [0, 0],
       radius: rotorInnerDiameter / 2
     }, %)
  |> hole(lugPattern(%), %)
rotorBump = extrude(-rotorInnerDiameterThickness, rotorBumpSketch)

rotorSecondaryPlatePlane = {
  plane: {
    origin: {
      x: 0,
      y: yAxisOffset + rotorTotalThickness * 0.75,
      z: 0
    },
    xAxis: { x: -1, y: 0, z: 0 },
    yAxis: { x: 0, y: 0, z: 1 },
    zAxis: { x: 0, y: 1, z: 0 }
  }
}

secondaryRotorSketch = startSketchOn(rotorSecondaryPlatePlane)
  |> circle({
       center: [0, 0],
       radius: rotorDiameter / 2
     }, %)
  |> hole(lugPattern(%), %)

secondRotor = extrude(rotorSinglePlateThickness, secondaryRotorSketch)

spacerSketch = startSketchOn(rotorSecondaryPlatePlane)
  |> circle({
       center: [spacerPatternDiameter / 2, 0],
       radius: spacerDiameter
     }, %)
  |> patternCircular2d({
       arcDegrees: 360,
       center: [0, 0],
       instances: spacerCount,
       rotateDuplicates: true
     }, %)

spacers = extrude(-spacerLength, spacerSketch)

rotorSlottedSketch = startSketchOn(rotor, 'START')
  |> startProfileAt([2.17, 2.56], %)
  |> xLine(0.12, %)
  |> yLine(2.56, %)
  |> xLine(-0.12, %)
  |> lineTo([profileStartX(%), profileStartY(%)], %)
  |> close(%)
  |> patternCircular2d({
       center: [0, 0],
       instances: drillAndSlotCount,
       arcDegrees: 360,
       rotateDuplicates: true
     }, %)

rotorSlotted = extrude(-rotorSinglePlateThickness / 2, rotorSlottedSketch)

rotorDrilledSketch = startSketchOn(rotor, 'START')
  |> circle({ center: [1.34, 3.23], radius: 0.12 }, %)
  |> patternLinear2d({
       axis: [-0.02, 0.04],
       instances: 3,
       distance: 1.1
     }, %)
  |> patternCircular2d({
       center: [0, 0],
       instances: drillAndSlotCount,
       arcDegrees: 360,
       rotateDuplicates: true
     }, %)

rotorDrilled = extrude(-rotorSinglePlateThickness, rotorDrilledSketch)

secondRotorSlottedSketch = startSketchOn(secondRotor, 'END')
  |> startProfileAt([-2.17, 2.56], %)
  |> xLine(-0.12, %)
  |> yLine(2.56, %)
  |> xLine(0.12, %)
  |> lineTo([profileStartX(%), profileStartY(%)], %)
  |> close(%)
  |> patternCircular2d({
       center: [0, 0],
       instances: drillAndSlotCount,
       arcDegrees: 360,
       rotateDuplicates: true
     }, %)

secondRotorSlotted = extrude(-rotorSinglePlateThickness / 2, secondRotorSlottedSketch)

secondRotorDrilledSketch = startSketchOn(secondRotor, 'START')
  |> circle({ center: [1.34, 3.23], radius: 0.12 }, %)
  |> patternLinear2d({
       axis: [-0.02, 0.04],
       instances: 3,
       distance: 1.1
     }, %)
  |> patternCircular2d({
       center: [0, 0],
       instances: drillAndSlotCount,
       arcDegrees: 360,
       rotateDuplicates: true
     }, %)

secondRotorDrilled = extrude(-rotorSinglePlateThickness, secondRotorDrilledSketch)