DCC 3D Print Scale Slicing and Support Checklist

1. Lock physical dimensions and process

State printer type, material, nozzle or pixel size, layer height range, target strength, surface priority, and final dimensions. Repair units before orientation. Include a Scale Bar or calibration feature with a known length and verify it numerically in the slicer. STL commonly carries no reliable unit metadata, so millimeter-versus-inch assumptions must be explicit. Preserve an unsimplified master and prepare a print-specific copy for hollowing, orientation, and support work.

2. Confirm mesh integrity at print scale

Check manifold closure, self-intersections, inverted faces, duplicate shells, minimum wall thickness, trapped cavities, and disconnected pieces. Small details that exist mathematically may fall below nozzle width, resin pixel size, or post-processing tolerance. Apply transforms and inspect final bounding dimensions. For resin shells, add drainage and ventilation holes based on orientation. A repair tool’s green status does not prove mechanical fit, clearance, or cleanable cavities.

3. Evaluate overhangs by process

Overhang Angle is measured relative to the build direction and its safe threshold depends on machine, material, cooling, layer height, and feature length. FDM bridges and overhangs behave differently; resin islands need earlier connection to the build structure. Use the slicer’s overhang visualization, then compare against a printer-specific calibration artifact. Do not accept a universal forty-five-degree rule for tiny tips, broad ceilings, flexible material, or high-detail resin.

4. Choose orientation with competing costs

Rotate the model to balance support contact, surface stair-stepping, cross-sectional suction, strength direction, print time, and build volume. Keep support marks away from visible faces and tight interfaces. FDM layer lines weaken some load directions; resin orientation affects peel force and cupping. Record the chosen transform. Orientation changes invalidate previous supports and can alter dimensions through anisotropic shrinkage, so treat it as a controlled design decision rather than a slicer convenience.

5. Configure slicing from measured needs

In Slicing, set profile, layer height, line width or exposure, walls, top and bottom layers, infill, speed, temperature, cooling, retraction, and compensation according to the process. Inspect every layer around thin walls, holes, embossed text, and first contact. Estimate time and material, but also examine acceleration and minimum-layer-time behavior. Save the exact profile version; default updates can change a successful job without modifying the model.

6. Design removable support structures

Place Support Structure contacts on robust, accessible regions. Tune density, interface layers, branch diameter, tip size, gap, and support angle from calibration. Add manual support to isolated starts and long lever arms; block support inside inaccessible channels or cosmetic faces. Confirm that removal will not snap thin geometry. For resin, ensure the support base, raft, and drainage path remain stable throughout peel forces rather than merely touching every highlighted island.

7. Work a miniature-print decision

A 75 mm creature miniature has a verified 10 mm Scale Bar. It is tilted thirty degrees to move resin contacts onto the back and reduce broad cross-sections. Overhang inspection finds unsupported claw tips below the calibrated threshold, so manual fine supports are added there while dense automatic contacts are blocked on the face. Slicing at 0.03 mm layers confirms every claw begins from a support and hollow-body drain holes remain open.

8. Interpret preview and print failures

Spaghetti or detached resin sections indicate missing first-contact support or poor adhesion. Sagging undersides suggest an unsafe overhang, excessive bridge span, or weak cooling. Pockmarks and scars reflect contact size or removal strategy. Split walls reveal insufficient thickness or orientation-sensitive stress. A model printing at the wrong size indicates unit assumptions despite a correct-looking viewport. Cupping and cracks in resin point to trapped volume, inadequate drainage, or peel force.

9. Archive the print job evidence

Deliver repaired print mesh, dimensions, Scale Bar measurement, orientation angles, overhang view, support screenshots, slicer profile, layer preview, estimated material, machine and material batch, calibration results, and post-process plan. Record model hash and exported job hash. Approval requires no unsupported islands, printable walls and gaps, accessible support removal, open drainage, correct dimensions, and a reviewed first-layer or raft preview before machine execution.

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