Internal geometry — X-ray
See-through internal view. Left: fluid footprint in plan, true scale (teal); ports show as the wider circles. Right: isometric of the internal void, vertical z exaggerated 3× for visibility. The exterior is an opaque solid block — this is what is inside it.
Download: PNG (x-ray)
Longitudinal section & exterior
Longitudinal section at y=0 (left): grey = solid, white = channel + bores. Exterior isometric (right): the outside of the CAD model, drawn opaque. Click either for full resolution.
Download: PNG (section) · PNG (top) · PNG (iso)
Description
A single monolithic block for resin SLA with one straight rectangular channel 50 µm deep × 50 µm wide, running the full 58.5 mm port-to-port at mid-height, a solid floor below and ceiling above, and two Ø1.5 mm vertical access bores to the top surface. Footprint 63.0 × 4.5 × 1.85 mm.
Verification
| metric | value |
|---|---|
| Channel cross-section (H × W) — target | 50 × 50 µm |
| Channel length — target | 58.5 mm |
| Footprint (L × W × H) | 63.0 × 4.5 × 1.85 mm |
| Channel volume — analytic (nominal) | 0.1463 µL |
| Channel volume — measured on the model's mesh | 0.1473 µL |
| Δ (mesh − analytic) | +0.68% — uniform 0.4 mm boolean overrun; cross-section exact |
| Void watertight | True |
| Void connected bodies | 1 — bore→channel→bore continuous |
| Chip watertight | True |
| Chip Euler number | 0 — genus-1: one cavity, two vents |
| Min feature vs Phrozen 12K X (px_min = 50/19) | 2.63 px |
| Min feature vs Phrozen 12K Y (px_min = 50/24) | 2.08 px |
| Min feature vs BYU Nordin (px_min = 50/7.6) | 6.58 px |
All geometry checks run with trimesh (merged vertices) on the exported STLs. See the bundled README for the full method. The minimum-feature rows are pixel counts; for each printer’s process limits, see Hardware and process.
Print adaptation
Target dimensions are what the design aims at; drawn dimensions are what its CAD model is drawn at. Where the two are the same number, no feature was resized to print.
Credits
Design: Ali Tahmasbizadeh, Gale Lab, University of Utah.
Files to download
- SCAD
channel_50x50um_58p5mm.scad9.8 KBDownload - STL
channel_50x50um_58p5mm.stl134.1 KBDownload - STL
void_channel_50x50um_58p5mm.stl132.3 KBDownloadFor inspection, not for printing: the fluid network, every space that holds liquid, as a solid. - PNG
channel_50x50um_58p5mm_xray.png100.4 KBDownload - PNG
channel_50x50um_58p5mm_section.png20.1 KBDownload - MD
README.md1.1 KBDownload