Measurement setup
Enter lower-layer lead, left slope B1, plateau c1, right slope b1 and tail. Left and right angles may differ. The upper base is a parallel offset by the stated perpendicular spacing; the five upper segments are solved individually. The tail is an explicit model input. Equal end levels require B1 × sin(left angle) = b1 × sin(right angle); otherwise the exit level differs.
Geometry and cut equations
Upper Lᵢ = lower Lᵢ − gap × [tan(previous turn / 2) + tan(next turn / 2)]. Missing end turns are zero. The two bases remain parallel at the entered perpendicular spacing.
For each closing joint, d = span × tan(|α| / 2), and the full V opening is 2d. Span is tray width for horizontal cuts and wall height for vertical cuts. Downward vertical joints open the side-wall slit instead; their formed edge gap is 2H × sin(|α| / 2).
Every segment must contain its adjacent closing-notch setbacks plus a 10 mm margin. Impossible or overlapping layouts are rejected.
Default numerical example
W = 200 mm · H = 50 mm · Straight stock length = 1700.00 mm. Stock station: 350.00 mm / 650.00 mm / 1050.00 mm / 1350.00 mm. θ: 30.00° / -30.00° / -30.00° / 30.00°.
Inspect all four stages
- Inspect the uncut straight channel.
- Mark every fold axis and its side-wall or base cut. Green lines show retained fold connections.
- Remove amber closing wedges. Opening joints are side-wall slits. Keep the indicated fold connections.
- Fold about every retained axis. Purple covers identify opening regions; they do not specify hardware.
Scope and method identity
This is a separately implemented TrayNeo method for the numbered entry. Exact correspondence with the reference product remains under review.
Ideal zero-radius geometry. Cut envelopes, retained folds and opening covers are shown explicitly; kerf, rolled lips, thickness allowances, cable clearance, springback and connection hardware are not specified.