run 20260611T223941Z-5b84

Summary

Prompt

Make a double-D profile shaft as a single solid. Start with a cylinder of diameter 40mm (radius 20mm) and height 60mm, with its base on the XY plane (z = 0 to z = 60), centered on the Z axis. Mill a flat on each side by subtracting a rectangular block from the left and from the right. The left flat is at x = -14: subtract all material at x < -14 (i.e. remove the cylindrical segment from x = -20 to x = -14, running the full height z = 0 to z = 60 and the full cylinder width in Y). The right flat is at x = +14: subtract all material at x > 14. The result is a shaft with flat-to-flat width 28mm and circular arc sections of radius 20mm on the front and back (+Y and -Y sides). Output a single solid.

Checks

params: {
  "type": "valid_solid"
}

details: {
  "root_count": 1,
  "solids_produced": 1
}

params: {
  "type": "bbox",
  "min": [
    -14,
    -20,
    0
  ],
  "max": [
    14,
    20,
    60
  ],
  "tolerance_mm": 0.15
}

details: {
  "actual_max": [
    14,
    20,
    60
  ],
  "actual_min": [
    -14,
    -20,
    0
  ],
  "deviation_max": [
    0,
    0,
    0
  ],
  "deviation_min": [
    0,
    0,
    0
  ],
  "max_abs_deviation_mm": 0,
  "tolerance_mm": 0.15
}

params: {
  "type": "mass_props",
  "volume_mm3": 61214.28,
  "center_of_mass": [
    0,
    0,
    30
  ],
  "tolerance_pct": 1
}

details: {
  "center_of_mass": {
    "actual": [
      -0.000006513502554597363,
      1.824299310292602e-15,
      29.999701349950552
    ],
    "bbox_diagonal_mm": 77.35631842325486,
    "deviation": [
      -0.000006513502554597363,
      1.824299310292602e-15,
      -0.00029865004944795714
    ],
    "max_abs_deviation_mm": 0.00029865004944795714,
    "pass": true,
    "spec": [
      0,
      0,
      30
    ],
    "tolerance_mm": 0.7735631842325487
  },
  "volume": {
    "actual_mm3": 61154.81313183481,
    "deviation_pct": 0.09714541797304359,
    "pass": true,
    "spec_mm3": 61214.28,
    "tolerance_pct": 1
  }
}

params: {
  "type": "step_roundtrip",
  "tolerance_pct": 1
}

details: {
  "per_solid": [
    {
      "bbox": {
        "max_abs_deviation_mm": 0,
        "original_max": [
          14,
          20,
          60
        ],
        "original_min": [
          -14,
          -20,
          0
        ],
        "pass": true,
        "roundtripped_max": [
          14,
          20,
          60
        ],
        "roundtripped_min": [
          -14,
          -20,
          0
        ],
        "tolerance_mm": 0.7735631842325487
      },
      "index": 0,
      "pass": true,
      "volume": {
        "deviation_pct": 0.19013455816841565,
        "original_mm3": 61154.81313183481,
        "pass": true,
        "roundtripped_mm3": 61038.536698087875
      }
    }
  ],
  "tolerance_pct": 1
}

Tool calls

{}

{
  "document_id": "doc_1781217581896_1",
  "type": "cylinder",
  "name": "Shaft Blank",
  "params": {
    "radius": 20,
    "height": 60,
    "center": [
      0,
      0,
      0
    ]
  }
}

{
  "source": "[let shaft [cylinder 20 60]\n [let left-block [translate -25 -25 0 [cube 11 50 60]]\n  [let right-block [translate 14 -25 0 [cube 11 50 60]]\n   [root [difference right-block [difference left-block shaft]] \"steel\"]]]]",
  "format": "json"
}

{
  "document_id": "doc_1781217581896_1",
  "type": "cylinder",
  "name": "Blank",
  "params": {
    "radius": 20,
    "height": 60,
    "segments": 64
  }
}

{
  "document_id": "doc_1781217581896_1",
  "type": "cube",
  "name": "LeftCutterBase",
  "params": {
    "size": [
      11,
      50,
      60
    ]
  }
}

{
  "document_id": "doc_1781217581896_1",
  "type": "cube",
  "name": "RightCutterBase",
  "params": {
    "size": [
      11,
      50,
      60
    ]
  }
}

{
  "document_id": "doc_1781217581896_1",
  "type": "translate",
  "name": "LeftCutter",
  "params": {
    "offset": [
      -25,
      -25,
      0
    ],
    "child": 2
  }
}

{
  "document_id": "doc_1781217581896_1",
  "type": "translate",
  "name": "RightCutter",
  "params": {
    "offset": [
      14,
      -25,
      0
    ],
    "child": 3
  }
}

{
  "document_id": "doc_1781217581896_1",
  "type": "difference",
  "name": "CutLeft",
  "params": {
    "base": 1,
    "tools": [
      4
    ]
  }
}

{
  "document_id": "doc_1781217581896_1",
  "type": "difference",
  "name": "CutLeft",
  "params": {
    "left": 1,
    "right": 4
  }
}

{
  "document_id": "doc_1781217581896_1",
  "type": "difference",
  "name": "DoubleDShaft",
  "params": {
    "left": 6,
    "right": 5
  }
}

{
  "document_id": "doc_1781217581896_1"
}

{
  "document_id": "doc_1781217581896_1"
}

{
  "document_id": "doc_1781217581896_1",
  "part_id": "6"
}

{
  "document_id": "doc_1781217581896_1"
}

{
  "document_id": "doc_1781217581896_1",
  "part_id": "1"
}

{
  "document_id": "doc_1781217581896_1",
  "part_id": "2"
}

{
  "document_id": "doc_1781217581896_1",
  "part_id": "3"
}

{
  "document_id": "doc_1781217581896_1",
  "part_id": "4"
}

{
  "document_id": "doc_1781217581896_1",
  "part_id": "5"
}

{
  "document_id": "doc_1781217581896_1"
}

{
  "document_id": "doc_1781217581896_1"
}

What the model built

isometric render via vcad-render · the model's actual .vcad output, faceted at 28 segments per cylinder · download 20260611T223941Z-5b84.vcad

.vcad source

{
  "version": "0.1",
  "nodes": {
    "1": {
      "id": 1,
      "name": "Blank",
      "op": {
        "type": "Cylinder",
        "radius": 20,
        "height": 60,
        "segments": 64
      }
    },
    "2": {
      "id": 2,
      "name": "LeftCutterBase",
      "op": {
        "type": "Cube",
        "size": {
          "x": 11,
          "y": 50,
          "z": 60
        }
      }
    },
    "3": {
      "id": 3,
      "name": "RightCutterBase",
      "op": {
        "type": "Cube",
        "size": {
          "x": 11,
          "y": 50,
          "z": 60
        }
      }
    },
    "4": {
      "id": 4,
      "name": "LeftCutter",
      "op": {
        "type": "Translate",
        "child": 2,
        "offset": {
          "x": -25,
          "y": -25,
          "z": 0
        }
      }
    },
    "5": {
      "id": 5,
      "name": "RightCutter",
      "op": {
        "type": "Translate",
        "child": 3,
        "offset": {
          "x": 14,
          "y": -25,
          "z": 0
        }
      }
    },
    "6": {
      "id": 6,
      "name": "CutLeft",
      "op": {
        "type": "Difference",
        "left": 1,
        "right": 4
      }
    },
    "7": {
      "id": 7,
      "name": "DoubleDShaft",
      "op": {
        "type": "Difference",
        "left": 6,
        "right": 5
      }
    }
  },
  "materials": {},
  "part_materials": {},
  "roots": [
    {
      "root": 7,
      "material": "default"
    }
  ]
}

generated 2026-06-19T01:47:56.203Z · static site, regenerate with npm run build -w @mecheval/leaderboard