[sushilm20]

Owner requests:

• "do dxf for parts it detects as a flat piece"
• "it only does the dxf if the panel is like 3mm or less, otherwise it should be 3dp step file"

What

Each 2D-cut part 3 mm thick or less now gets a DXF of its flat face in the build pack, next to its STEP file.

Onshape endpoint and cost

• The v9 OpenAPI has no translation option that picks a face. Its DXF options (sheetMetalFlat, flatPatternAsync, bend lines) are for sheet-metal flat patterns.
• So the Worker reads the documented GET /api/v9/parts/d/{did}/{w|v}/{wvid}/e/{eid}/partid/{pid}/bodydetails?configuration=…&includeGeometricData=true.
• When the response names a spline or ellipse, it also reads …/partid/{pid}/tessellatededges.
• Cost: one billable request per 2D-cut part, or two with a spline or ellipse. Both go through onshapeFetcher, the per-poll budget, and the ledger (body-details, tessellated-edges). There is no translation and no polling.
• In each poll, geometry reads come after STEP starts and polls. A rate limit on geometry therefore never costs a STEP its deadline.

Drawing

• packages/shared/src/dxf.ts picks the largest planar face of the part's solid body and draws it as seen from outside the part, in millimetres.
• Lines and arcs are exact; closed circular edges become circles. Anything else comes from Onshape's tessellation.
• The output is R12 ASCII with $INSUNITS 4, on layer CUT.
• The face is rejected in these cases:
  • it is a pocket floor;
  • the part has no flat face on its far side;
  • a loop on the face is a blind recess and does not run through to that far side.
• The browser does the drawing, because parsing a 400-hole plate took 10–26 ms in Node, over the free plan's 10 ms. The Worker only stores Onshape's JSON for an hour and serves it at /api/exports/{jobId}/files/{i}.body|.edges.

Thickness rule

• A flat plate is a DXF cut part only at 3 mm or less. The rule allows 0.005 mm of tolerance, so 1/8 in (3.175 mm) is printed.
• In the classifier, the thickness comes from the name, description, or configuration: "6mm Side Plate", "1/8 in", "300x200x3mm", or Thickness=3+mm.
• In the export, the same rule applies to tagged plates. When nothing states the thickness, it is measured from the body details already read, with no extra request.
• A thicker flat part becomes a 3D print: STEP only, filed in 3D_print/, with the note "flat, 6 mm thick: over 3 mm, so 3D printed". The note appears in the Make panel and in MANIFEST.txt.
• A person's manual choice always wins.

Files

• In the ZIP, 2D_cut/{stepFileName}.dxf sits beside the STEP.
• MANIFEST.txt lists each DXF with its size and thickness. A DXF that fails gets its own section, and its failure never fails the STEP.
• The workbook's Make sheet gains a "DXF file" column.
• pnpm sample:step now includes a DXF in the committed sample ZIP.

Tests

• DXF drawing: face choice, arc direction, holes, splines, pocket floor, blind recess, and the thickness measured from geometry.
• Thickness rule: exactly 3 mm, 3.0001 mm, 3.2 mm, 1/8 in, a configuration value, a name with no thickness, a manual override, and a team tag.
• Export job: request paths, the order of work within a poll and the budget, and a DXF failure that leaves the STEP intact.
• ZIP: the manifest, including notes.
• Workbook: the Make sheet column.
• Worker integration against mock Onshape.
• Smoke: the downloaded ZIP holds the DXF.

Checks run locally: eslint, typecheck, unit tests (310), smoke (11), build.

Not verified live

No Onshape request was made, so these still need a live check:

• The real body details shape: the vector form, midPoint on arc edges, isOrientedWithFace, area, and face loops that list every face's edges.
• Whether parts linked from other documents need linkDocumentId.
• How large the response is for a big plate.
• That the DXF opens at the right size in LightBurn, Inkscape, or CAM.

[greptile-apps]

Confidence Score: 5/5

[Medium impact] The changes since the previous review appear safe to merge; no new actionable issue was established.

Summary

Adds browser-drawn DXF files beside STEP files for thin, flat parts.

• 2D-cut parts get a DXF of their flat face in the build pack.
• Flat parts over 3 mm thick are assigned to 3D printing.

All four supplied threads are unnumbered and were manually resolved by sushilm20 without explanatory replies. No duplicate comments were added.

_{Reviews (3) · Last reviewed commit: "Greptile: only thickness-keyed configura..." · Reviewed by Greptile}

[sushilm20]

@greptile review

[sushilm20]

@greptile review