Façade cassettespro
Four-notch star cassette
A four-point star on a plain rectangular outline: the central apex falls in sharp ridges to the four corners, while four notches pinched below the base plane open the valley towards each edge midpoint. Sixteen facets, a straight edge, flat returns.
Open in the studio
ACM 3D Studio
- Developed
- 727.1 × 726 mm
- Material
- ACM 4 mm
- Folds
- 31
- Mark
- star-notch
Fabrication data
Four-notch star cassette — at 600 × 600 mm in 4 mm ACM, this family unfolds into a 727.1 × 726 mm flat pattern with 31 folds, including 3,376 mm of groove machined from the visible face, with the sheet flipped for that pass. A 1,500 × 3,200 mm sheet holds 8 of them, for 18.7 % waste.
- Material per panel
- 0.488 m²
- Folds
- 31
- Total groove length
- 8,803 mm
- Cutting length
- 5,899 mm
- Corner slits
- 9
- Corner reliefs
- 8
V-grooves (apex angle)
- 23.7°2,528 mm
- 94.2°2,413 mm
- 90°1,728 mm
- 36.3°1,286 mm
- 14.5°848 mm
Panels per sheet
- 1,220 × 2,440 mm3(50.9 % waste)
- 1,500 × 3,200 mm8(18.7 % waste)
DXF layers
- CONTOUR5,899 mm
- RAINURE_AVANT_135front face2,528 mm
- RAINURE_602,413 mm
- RAINURE_901,728 mm
- RAINURE_1351,286 mm
- RAINURE_AVANT_160front face848 mm
The names and colours your CAM software will show. RAINURE_AVANT: fold concave on the visible face, sheet flipped for that pass.
Computed by the engine at the default parameters, on 4 mm ACM and the reference router. Your own machine and material profiles change these values in the studio.
Parameters
| Parameters | Range | Default |
|---|---|---|
| Width | 200 – 3,000 mm | 600 mm |
| Height | 200 – 3,000 mm | 600 mm |
| Relief height | 25 – 150 mm | 60 mm |
| Notch position | 12 – 38 % | 33 % |
| Notch depth | 3 – 45 % | 12 % |
| Return depth | 0 – 200 mm | 40 mm |
| Fixing tabs | — | ✓ |
| Tab width | 10 – 60 mm | 20 mm |
PresetsFour-notch starDeep reliefGutter notch
Manufacturing constraints
- The return must exceed the groove width plus half the bend deduction, or the groove eats into the return.
- Facet-to-facet folds are grooved with the smallest cutter of the profile, V left open: the angle is held by the geometry. The angle between two facets must not exceed that cutter’s apex angle.
- Vertical returns, all tabs flat in the −D plane (rail mounting). The facet-to-return fold is 90° ± slope: below 90°, the 90° cutter is left open and the return is held by the riveted tab; above 90° (facet descending towards the edge), a wider cutter (60° nominal = 120° apex) or the machine profile’s overfold tolerance is needed.
- Every raised vertex requires a V-slit to the edge (a flat sheet has 360°, the relief less). Near the vertex the slit is narrower than the contour tool: it is cut along its axis and the tool bites each facet by up to Ø/2.
- Tabs are shortened at every corner and every kink of the edge so they never collide behind the panel: by (return + 2 mm), and more on a sharp corner, where the bisector must be cleared (tab width ÷ tan(angle/2)). An edge too short gets no tab.
- The notches sink below the base plane: they must stay above the tab plane (−return depth), otherwise the relief passes behind the frame and the cassette no longer sits flat on its rails.
- The central apex must stay a PEAK: the plane angles of the eight facets meeting there must sum to less than 360°. Sinking the notches opens it up — the four facets that dive towards them widen at the apex — and past the limit the apex becomes a saddle, which flat sheet cannot take. The cure: raise the relief, or move the notches towards the edge.
- At 33 %, each notch lands on the centroid of the triangle formed by the two corners of its side and the panel centre — the same rule of thirds as the twin diagonal slope cassette, and the value measured on the reference. Closer to the edge, the valley becomes a narrow gutter that takes a far deeper notch; closer to the centre, the points grow slender but the apex flattens fast.