← mecheval / run / a6-pulley-01 / claude-mcp-claude-opus-4-7 / 20260612T004028Z-1643

run 20260612T004028Z-1643

a6-pulley-01 · claude-mcp-claude-opus-4-7

Summary

statusfail
score0.33 (2/6)
submissionself-run
modelclaude-mcp-claude-opus-4-7 (anthropic)
started2026-06-12T00:40:28.181Z
ended2026-06-12T00:42:27.433Z
tokens594,972 in · 6,832 out · 601,804 total
wallclock119.2s
tool calls37
task hash58d33316e6c4cd6c…
vcad hash63a3405e2fb8a530…

Prompt

Make a flanged belt pulley as a single solid. The pulley has three coaxial sections stacked along Z, all centered on the Z axis, with the base on the XY plane. Bottom flange: a cylinder of diameter 80mm and height 8mm (z = 0 to z = 8). Belt groove section: a cylinder of diameter 50mm and height 24mm (z = 8 to z = 32). Top flange: a cylinder of diameter 80mm and height 8mm (z = 32 to z = 40). A central through-bore of diameter 16mm runs along the Z axis through the full height (z = 0 to z = 40). The three outer sections form the stepped outer profile of the pulley when unioned together; the belt rides in the groove between the two flanges. Output a single solid.

Checks

0
valid_solid
pass
params + details 
params: {
  "type": "valid_solid"
}

details: {
  "root_count": 3,
  "solids_produced": 3
}
1
bbox
fail
Z off by -8.00mm
params + details 
params: {
  "type": "bbox",
  "min": [
    -40,
    -40,
    0
  ],
  "max": [
    40,
    40,
    40
  ],
  "tolerance_mm": 0.1
}

details: {
  "actual_max": [
    40,
    40,
    32
  ],
  "actual_min": [
    -40,
    -40,
    0
  ],
  "deviation_max": [
    0,
    0,
    -8
  ],
  "deviation_min": [
    0,
    0,
    0
  ],
  "max_abs_deviation_mm": 8,
  "tolerance_mm": 0.1
}
2
mass_props
fail
volume off by 12.3%
params + details 
params: {
  "type": "mass_props",
  "volume_mm3": 119506.19,
  "center_of_mass": [
    0,
    0,
    20
  ],
  "tolerance_pct": 1
}

details: {
  "center_of_mass": {
    "actual": [
      -2.7099694122975878e-17,
      -1.0614046864832212e-16,
      12.411214946818351
    ],
    "bbox_diagonal_mm": 117.57550765359255,
    "deviation": [
      -2.7099694122975878e-17,
      -1.0614046864832212e-16,
      -7.588785053181649
    ],
    "max_abs_deviation_mm": 7.588785053181649,
    "pass": false,
    "spec": [
      0,
      0,
      20
    ],
    "tolerance_mm": 1.1757550765359255
  },
  "volume": {
    "actual_mm3": 134244.27562107926,
    "deviation_pct": 12.332487230225695,
    "pass": false,
    "spec_mm3": 119506.19,
    "tolerance_pct": 1
  }
}
3
hole_count
fail
found 0/1 holes of ⌀16mm
params + details 
params: {
  "type": "hole_count",
  "diameter_mm": 16,
  "expected": 1,
  "diameter_tolerance_mm": 0.1
}

details: {
  "actual": 0,
  "diameter_mm": 16,
  "diameter_tolerance_mm": 0.1,
  "expected": 1,
  "found": []
}
4
hole_positions
fail
1/1 mispositioned
params + details 
params: {
  "type": "hole_positions",
  "diameter_mm": 16,
  "positions": [
    [
      0,
      0,
      0
    ]
  ],
  "tolerance_mm": 0.2
}

details: {
  "diameter_mm": 16,
  "per_expected": [
    {
      "pass": false,
      "reason": "no candidate cylindrical feature of this diameter remained unmatched",
      "spec_xy": [
        0,
        0
      ]
    }
  ],
  "tolerance_mm": 0.2,
  "unmatched_extras": []
}
5
step_roundtrip
pass
params + details 
params: {
  "type": "step_roundtrip",
  "tolerance_pct": 1
}

details: {
  "per_solid": [
    {
      "bbox": {
        "max_abs_deviation_mm": 0,
        "original_max": [
          40,
          40,
          8
        ],
        "original_min": [
          -40,
          -40,
          0
        ],
        "pass": true,
        "roundtripped_max": [
          40,
          40,
          8
        ],
        "roundtripped_min": [
          -40,
          -40,
          0
        ],
        "tolerance_mm": 1.1341957503006261
      },
      "index": 0,
      "pass": true,
      "volume": {
        "deviation_pct": 0.4815275502572024,
        "original_mm3": 40147.820818677304,
        "pass": true,
        "roundtripped_mm3": 39954.49800060748
      }
    },
    {
      "bbox": {
        "max_abs_deviation_mm": 0,
        "original_max": [
          25,
          25,
          24
        ],
        "original_min": [
          -25,
          -25,
          0
        ],
        "pass": true,
        "roundtripped_max": [
          25,
          25,
          24
        ],
        "roundtripped_min": [
          -25,
          -25,
          0
        ],
        "tolerance_mm": 0.7467261881037789
      },
      "index": 1,
      "pass": true,
      "volume": {
        "deviation_pct": 0.48152465364927927,
        "original_mm3": 47048.22740120098,
        "pass": true,
        "roundtripped_mm3": 46821.67858715922
      }
    },
    {
      "bbox": {
        "max_abs_deviation_mm": 0,
        "original_max": [
          25,
          25,
          32
        ],
        "original_min": [
          -25,
          -25,
          8
        ],
        "pass": true,
        "roundtripped_max": [
          25,
          25,
          32
        ],
        "roundtripped_min": [
          -25,
          -25,
          8
        ],
        "tolerance_mm": 0.7467261881037789
      },
      "index": 2,
      "pass": true,
      "volume": {
        "deviation_pct": 0.481524653649233,
        "original_mm3": 47048.227401200966,
        "pass": true,
        "roundtripped_mm3": 46821.67858715923
      }
    }
  ],
  "tolerance_pct": 1
}

Tool calls

0
open_document
ok
2ms
args
{}
1
create
err
5ms
args
{
  "document_id": "doc_1781224828372_1",
  "type": "difference",
  "name": "Flanged Pulley",
  "params": {
    "a": {
      "op": "union",
      "params": {
        "a": {
          "op": "union",
          "params": {
            "a": {
              "op": "translate",
              "params": {
                "x": -40,
                "y": -40,
                "z": 0,
                "s": {
                  "op": "cylinder",
                  "params": {
                    "r": 40,
                    "h": 8
                  }
                }
              }
            },
            "b": {
              "op": "translate",
              "params": {
                "x": -25,
                "y": -25,
                "z": 8,
                "s": {
                  "op": "cylinder",
                  "params": {
                    "r": 25,
                    "h": 24
                  }
                }
              }
            }
          }
        },
        "b": {
          "op": "translate",
          "params": {
            "x": -40,
            "y": -40,
            "z": 32,
            "s": {
              "op": "cylinder",
              "params": {
                "r": 40,
                "h": 8
              }
            }
          }
        }
      }
    },
    "b": {
      "op": "translate",
      "params": {
        "x": -8,
        "y": -8,
        "z": 0,
        "s": {
          "op": "cylinder",
          "params": {
            "r": 8,
            "h": 40
          }
        }
      }
    }
  }
}
2
read
ok
3ms
args
{
  "document_id": "doc_1781224828372_1"
}
3
create
err
2ms
args
{
  "document_id": "doc_1781224828372_1",
  "type": "cylinder",
  "name": "BottomFlange",
  "params": {
    "radius": 40,
    "height": 8,
    "center_x": 0,
    "center_y": 0,
    "center_z": 0
  }
}
4
create
ok
5ms
args
{
  "document_id": "doc_1781224828372_1",
  "type": "cylinder",
  "name": "BottomFlange",
  "params": {
    "radius": 40,
    "height": 8,
    "segments": 64
  }
}
5
read
ok
3ms
args
{
  "document_id": "doc_1781224828372_1",
  "part_id": "1"
}
6
delete
ok
3ms
args
{
  "document_id": "doc_1781224828372_1",
  "part_id": "1"
}
7
create_cad_loon
ok
13ms
args
{
  "source": "[root\n  [difference\n    [translate 0 0 0 [cylinder 8 40]]\n    [union\n      [translate 0 0 32 [cylinder 40 8]]\n      [union\n        [translate 0 0 8 [cylinder 25 24]]\n        [translate 0 0 0 [cylinder 40 8]]]]]\n  \"steel\"]",
  "format": "json"
}
8
create
ok
3ms
args
{
  "document_id": "doc_1781224828372_1",
  "type": "cylinder",
  "name": "BottomFlange",
  "params": {
    "radius": 40,
    "height": 8,
    "segments": 64
  }
}
9
create
ok
5ms
args
{
  "document_id": "doc_1781224828372_1",
  "type": "cylinder",
  "name": "GrooveCyl",
  "parent_part_id": "1",
  "params": {
    "radius": 25,
    "height": 24,
    "segments": 64
  }
}
10
read
ok
3ms
args
{
  "document_id": "doc_1781224828372_1"
}
11
read
ok
3ms
args
{
  "document_id": "doc_1781224828372_1",
  "part_id": "2"
}
12
delete
ok
2ms
args
{
  "document_id": "doc_1781224828372_1",
  "part_id": "1"
}
13
delete
ok
1ms
args
{
  "document_id": "doc_1781224828372_1",
  "part_id": "2"
}
14
create
ok
3ms
args
{
  "document_id": "doc_1781224828372_1",
  "type": "cylinder",
  "name": "BottomFlange",
  "params": {
    "radius": 40,
    "height": 8,
    "segments": 64
  }
}
15
create
err
3ms
args
{
  "document_id": "doc_1781224828372_1",
  "type": "union",
  "name": "AddGroove",
  "parent_part_id": "1",
  "params": {
    "other": {
      "op": "translate",
      "offset": {
        "x": 0,
        "y": 0,
        "z": 8
      },
      "child": {
        "op": "cylinder",
        "radius": 25,
        "height": 24,
        "segments": 64
      }
    }
  }
}
16
create
err
1ms
args
{
  "document_id": "doc_1781224828372_1",
  "type": "union",
  "name": "AddGroove",
  "parent_part_id": "1",
  "params": {
    "left": 1,
    "right": {
      "type": "Translate",
      "offset": {
        "x": 0,
        "y": 0,
        "z": 8
      },
      "child": {
        "type": "Cylinder",
        "radius": 25,
        "height": 24,
        "segments": 64
      }
    }
  }
}
17
delete
ok
3ms
args
{
  "document_id": "doc_1781224828372_1",
  "part_id": "1"
}
18
create
ok
3ms
args
{
  "document_id": "doc_1781224828372_1",
  "type": "cylinder",
  "name": "Bottom",
  "params": {
    "radius": 40,
    "height": 8,
    "segments": 64
  }
}
19
create
ok
3ms
args
{
  "document_id": "doc_1781224828372_1",
  "type": "translate",
  "name": "MoveGroove",
  "parent_part_id": "1",
  "params": {
    "offset": {
      "x": 0,
      "y": 0,
      "z": 8
    },
    "child": 1
  }
}
20
read
ok
1ms
args
{
  "document_id": "doc_1781224828372_1"
}
21
read
ok
2ms
args
{
  "document_id": "doc_1781224828372_1",
  "part_id": "2"
}
22
delete
ok
3ms
args
{
  "document_id": "doc_1781224828372_1",
  "part_id": "1"
}
23
delete
ok
1ms
args
{
  "document_id": "doc_1781224828372_1",
  "part_id": "2"
}
24
create
err
1ms
args
{
  "document_id": "doc_1781224828372_1",
  "type": "difference",
  "name": "Pulley",
  "params": {
    "left": {
      "type": "Union",
      "left": {
        "type": "Union",
        "left": {
          "type": "Cylinder",
          "radius": 40,
          "height": 8,
          "segments": 64
        },
        "right": {
          "type": "Translate",
          "offset": {
            "x": 0,
            "y": 0,
            "z": 8
          },
          "child": {
            "type": "Cylinder",
            "radius": 25,
            "height": 24,
            "segments": 64
          }
        }
      },
      "right": {
        "type": "Translate",
        "offset": {
          "x": 0,
          "y": 0,
          "z": 32
        },
        "child": {
          "type": "Cylinder",
          "radius": 40,
          "height": 8,
          "segments": 64
        }
      }
    },
    "right": {
      "type": "Cylinder",
      "radius": 8,
      "height": 40,
      "segments": 64
    }
  }
}
25
create
ok
3ms
args
{
  "document_id": "doc_1781224828372_1",
  "type": "cylinder",
  "name": "c1",
  "params": {
    "radius": 40,
    "height": 8,
    "segments": 64
  }
}
26
create
ok
1ms
args
{
  "document_id": "doc_1781224828372_1",
  "type": "cylinder",
  "name": "c2",
  "params": {
    "radius": 25,
    "height": 24,
    "segments": 64
  }
}
27
create
ok
3ms
args
{
  "document_id": "doc_1781224828372_1",
  "type": "union",
  "name": "u1",
  "params": {
    "left": 1,
    "right": 2
  }
}
28
read
ok
2ms
args
{
  "document_id": "doc_1781224828372_1"
}
29
delete
ok
1ms
args
{
  "document_id": "doc_1781224828372_1",
  "part_id": "1"
}
30
delete
ok
1ms
args
{
  "document_id": "doc_1781224828372_1",
  "part_id": "2"
}
31
delete
ok
1ms
args
{
  "document_id": "doc_1781224828372_1",
  "part_id": "3"
}
32
create
ok
2ms
args
{
  "document_id": "doc_1781224828372_1",
  "type": "cylinder",
  "name": "Bottom",
  "params": {
    "radius": 40,
    "height": 8,
    "segments": 64
  }
}
33
create
ok
3ms
args
{
  "document_id": "doc_1781224828372_1",
  "type": "cylinder",
  "name": "GrooveBase",
  "params": {
    "radius": 25,
    "height": 24,
    "segments": 64
  }
}
34
create
ok
1ms
args
{
  "document_id": "doc_1781224828372_1",
  "type": "translate",
  "name": "GroovePos",
  "parent_part_id": "2",
  "params": {
    "offset": {
      "x": 0,
      "y": 0,
      "z": 8
    },
    "child": 2
  }
}
35
read
ok
2ms
args
{
  "document_id": "doc_1781224828372_1"
}
36
get_document
ok
0ms
args
{
  "document_id": "doc_1781224828372_1"
}

What the model built

isometric render via vcad-render · the model's actual .vcad output, faceted at 28 segments per cylinder · download 20260612T004028Z-1643.vcad

.vcad source

{
  "version": "0.1",
  "nodes": {
    "1": {
      "id": 1,
      "name": "Bottom",
      "op": {
        "type": "Cylinder",
        "radius": 40,
        "height": 8,
        "segments": 64
      }
    },
    "2": {
      "id": 2,
      "name": "GrooveBase",
      "op": {
        "type": "Cylinder",
        "radius": 25,
        "height": 24,
        "segments": 64
      }
    },
    "3": {
      "id": 3,
      "name": "GroovePos",
      "op": {
        "type": "Translate",
        "child": 2,
        "offset": {
          "x": 0,
          "y": 0,
          "z": 8
        }
      }
    }
  },
  "materials": {},
  "part_materials": {},
  "roots": [
    {
      "root": 1,
      "material": "default"
    },
    {
      "root": 2,
      "material": "default"
    },
    {
      "root": 3,
      "material": "default"
    }
  ]
}
mecheval · an evaluation suite by Municipal Robotics
sibling project: vcad. · github

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