techmannih/nema34-mounted-stepper-controller

engineering/mechanical/assembly.json

{
  "status": "Motor/PCB alignment and connected J2 harness preview; no mounting fasteners modeled or qualified",
  "motor": {
    "name": "STEPPERONLINE 34HS31-6004S1",
    "step": "34HS31-6004S1.step",
    "sha256": "675e55f1d50271255bbd058d8c2e867ecced44b194ded1586c63da77ce1c8a19",
    "glb": "engineering/mechanical/34hs31-6004s1.glb",
    "mesh_count": 1,
    "cad_transform": "STEP X/Y -> PCB X/Y; STEP Z - 79.5 -> CAD Z; front shaft points away from PCB",
    "rear_face_step_z_mm": 79.5,
    "front_flange_front_step_z_mm": 0,
    "front_flange_back_step_z_mm": 10,
    "body_length_drawing_max_mm": 80,
    "front_hole_xy_mm": [
      [
        34.75,
        34.75
      ],
      [
        -34.75,
        34.75
      ],
      [
        -34.75,
        -34.75
      ],
      [
        34.75,
        -34.75
      ]
    ],
    "front_hole_pitch_drawing_mm": 69.6,
    "front_hole_pitch_tolerance_mm": 0.2,
    "front_hole_diameter_mm": 6.5,
    "front_hole_note": "STEP centers give 69.5 mm pitch, within the drawing 69.6 +/- 0.2 mm. Use drawing tolerances for fabrication.",
    "rear_rotating_shaft_access": "Unconfirmed: single fused STEP envelope shows a central recess, not an identified rotating shaft end or an approved attachment bore.",
    "rear_case_screws": "Existing case fasteners are not approved accessory threads. Do not remove/replace them without manufacturer confirmation.",
    "step_archive": "engineering/mechanical/34HS31-6004S1-manufacturer.zip",
    "rear_hole_xy_mm": [
      [
        24.447132,
        -38.374311
      ],
      [
        38.374311,
        24.447132
      ],
      [
        -24.447132,
        38.374311
      ],
      [
        -38.374311,
        -24.447132
      ]
    ],
    "assembly_glb": "engineering/mechanical/34hs31-6004s1-routed-cable.glb"
  },
  "mount": {
    "pcb_bottom_to_motor_rear_mm": 19.5,
    "copper_keepout_radius_mm": 4.25,
    "copper_keepout_layers": [
      "F.Cu",
      "B.Cu"
    ],
    "concept": "Four existing PCB holes preserved. Unsupported long posts, adapter, spacers, nuts, screws and cable-support fixture removed at user request. No replacement hardware assumed.",
    "hardware_modeled": false,
    "mechanically_secured": false,
    "spacing_note": "19.5 mm retained only as the previous preview separation; not a manufactured mounting stack or confirmed final spacing.",
    "rear_thread_specification": null,
    "rear_usable_depth_mm": null
  },
  "encoder": {
    "sensor": "Optional U18 AS5047P, bottom side at PCB origin; C52/C53 on top; all three doNotPlace",
    "preview_included": false,
    "status": "Unresolved for ordered single-shaft motor",
    "reason": "QSH-specific pilot, shaft holder and magnet stack withdrawn. Manufacturer confirmation of rotating rear-shaft access is required before a new attachment and working gap can be defined.",
    "do_not_place_references": [
      "U18",
      "C52",
      "C53"
    ]
  },
  "unresolved": [
    "Rear mounting thread, usable engagement and final clearance stack are unverified; no fastener or secure mount is claimed",
    "Motor body is 79.5 mm in STEP but 80 mm maximum in drawing; full tolerance stack remains to be reviewed",
    "Rear rotating-shaft access and magnet attachment are not established; no encoder hardware is modeled",
    "6 A/phase must be translated to an approved driver current/hold waveform; external load inertia and stop profile remain unknown; manufacturer rotor inertia is 1400 g cm²",
    "J2 harness has no new retention bracket; final strain-relief attachment requires physical verification"
  ],
  "sources": [
    "https://www.amazon.com/dp/B091C83HWF",
    "https://www.omc-stepperonline.com/s-series-nema-34-stepper-motor-4-8nm-679-87oz-in-14mm-key-way-shaft-1m-cable-34hs31-6004s1",
    "https://files.omc-stepperonline.com/34HS31-6004S1.STEP",
    "https://files.omc-stepperonline.com/34HS31-6004S1_Full_Datasheet.pdf",
    "https://look.ams-osram.com/m/d05ee39221f9857/original/AS5047P-DS000324.pdf"
  ],
  "published_models": {
    "motor": {
      "url": "https://raw.githubusercontent.com/techmannih/pd1180-epr/6d2a3103ddf35e9511eebf9be376b01f3f9c7ed8/engineering/mechanical/34hs31-6004s1.glb",
      "sha256": "58c1dc543cfc05583ffebd5db7cb66036269adcbbc6b11f0184318a4c2c9d87f"
    },
    "harness": {
      "url": "https://raw.githubusercontent.com/techmannih/pd1180-epr/7be2382153a87b409f3611c56b700579151bf30d/engineering/mechanical/harness-proposal.glb",
      "sha256": "30e7e167b3b1f328fd09643784ec91232e5f04bdb929b869731c758983648753"
    }
  },
  "connector_body_clearances": [
    {
      "reference": "J2",
      "minimum_board_edge_mm": 0.5,
      "minimum_component_gap_mm": 0.5,
      "basis": "Complete projected supplier CAD envelope; top-entry B4P-VH connector body must remain inside the board perimeter."
    }
  ],
  "runtime_assets_base_url": "https://raw.githubusercontent.com/techmannih/pd1180-epr/d632f484ea1046071beb703e3e6297d63388f960/engineering/mechanical/parts",
  "brake": {
    "reference": "J3",
    "assembly_modeled": true,
    "layout": "engineering/mechanical/harness-layout.json",
    "resistor": "LPS0300H10R0GB (provisional)",
    "physical_fit_verified": false,
    "thermal_qualified": false,
    "cooling": "Illustrative cooling/guard interface; no selected or rated heatsink"
  }
}