Gears and transmission
Folding Device Stand Assembly
- Bounding box
- 690.0 × 228.1 × 252.2 mm
- Engine
- Precision B-rep
- Parameters
- 50
- Published
- September 16, 2026
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The prompt
Design a REAL, FUNCTIONAL, FDM-printable portable folding stand for: MacBook Air 15” M4: 340.4 × 237.6 × 11.5 mm, 1.51 kg iPad Pro 13” M4: 281.6 × 215.5 × 5.1 mm, 579 g iPhone 17 Pro Max: 163.4 × 78 × 8.75 mm, 231 g The MacBook is ONLY a reference. The stand must be completely freestanding behind it. Neither iPad nor iPhone may touch or use the MacBook structurally. DEPLOYED LAYOUT: MacBook on desk → stand behind it → iPad supported above MacBook display → iPhone supported immediately RIGHT of MacBook display. The iPhone must NOT be above or behind the MacBook. CRITICAL: The iPhone holder needs independent HORIZONTAL and VERTICAL adjustment. Vertical adjustment aligns its TOP edge with the MacBook display TOP edge. Horizontal adjustment aligns its LEFT edge with the MacBook display RIGHT edge. Use simple rigid locking positions with captive pins or a locking rail. MECHANICAL DESIGN: Use a simple original folding architecture: * rigid base * foldable main support * iPad cradle * adjustable iPhone arm/holder * two fold-out side outriggers The main support folds down for transport and has a captive pivot, positive mechanical stop and tool-free locking pin. Both outriggers fold against the base and have captive pivots, positive deployed/folded stops and tool-free captive locking pins. Mechanical stops must carry structural loads; do not rely on friction. The iPad rests in a robust lower cradle and is completely independent of the MacBook. The iPhone arm must resist bending and torsion. The holder must securely retain the bare iPhone while allowing quick one-hand removal without blocking the display, buttons, USB-C port or cameras. The MacBook lid and hinge must have sufficient clearance and remain fully operable. FOLDING: All parts remain one captive assembly. No loose pins or screws. Target folded size: ≤300 W × 150 D × 60 mm thick. No tools required. FDM: Design specifically for PETG FDM printing. Use realistic wall thicknesses, clearances, reinforced pivot bosses and fillets. Avoid fragile thin parts, impossible overhangs and zero-clearance moving fits. STABILITY: The stand must remain stable with both devices installed and during normal touch interaction. Account for the iPad’s forward load and the iPhone’s asymmetric right-side load. Use the outriggers to create a sufficiently large support footprint. Keep the mechanism simple, robust and low-part-count. Avoid unnecessary gears, joints and mechanisms. FINAL REQUIREMENT: Generate a complete manufacturable CAD assembly with separate printable parts suitable for STEP/STL export. This must be a mechanically functional product, not a decorative concept.
Parameters
| Name | Value | Range |
|---|---|---|
| Base length | 280 mm | 260 – 300 |
| Base width | 140 mm | 130 – 150 |
| Base thickness | 12 mm | 8 – 20 |
| Hinge lug width | 30 mm | 20 – 40 |
| Hinge lug depth | 20 mm | 15 – 30 |
| Hinge lug height | 25 mm | 15 – 30 |
| Stop ledge width | 20 mm | 10 – 30 |
| Stop ledge height | 8 mm | 5 – 15 |
| Main support width | 260 mm | 230 – 280 |
| Main support height | 240 mm | 200 – 260 |
| Main support thickness | 12 mm | 8 – 20 |
| Main support tilt | 20 deg | 10 – 35 |
| Top rail depth | 20 mm | 12 – 30 |
| Top rail height | 12 mm | 8 – 20 |
| iPad cradle width | 290 mm | 240 – 310 |
| iPad cradle depth | 32 mm | 25 – 40 |
| iPad cradle height | 28 mm | 20 – 35 |
| Cradle back thickness | 8 mm | 5 – 12 |
| Cradle shelf height | 8 mm | 5 – 12 |
| Cradle front lip height | 8 mm | 5 – 12 |
| Cradle vent hole dia | 6 mm | 3 – 10 |
| Left outrigger length | 130 mm | 100 – 160 |
| Left outrigger width | 30 mm | 20 – 40 |
| Left outrigger thickness | 12 mm | 8 – 20 |
| Right outrigger length | 170 mm | 140 – 200 |
| Right outrigger width | 35 mm | 25 – 45 |
| Right outrigger thickness | 12 mm | 8 – 20 |
| iPhone mast height | 180 mm | 140 – 220 |
| Mast width | 40 mm | 30 – 50 |
| Mast depth | 25 mm | 15 – 35 |
| Mast hole pitch | 10 mm | 5 – 20 |
| Mast hole dia | 6 mm | 4 – 8 |
| Mast flange length | 60 mm | 40 – 80 |
| Mast flange width | 35 mm | 25 – 45 |
| Mast flange height | 10 mm | 6 – 15 |
| Carriage block width | 60 mm | 40 – 80 |
| Carriage block depth | 30 mm | 20 – 40 |
| Carriage block height | 45 mm | 30 – 60 |
| Carriage arm length | 120 mm | 80 – 160 |
| Carriage arm width | 20 mm | 10 – 30 |
| Carriage arm height | 10 mm | 6 – 15 |
| iPhone holder width | 95 mm | 70 – 110 |
| iPhone holder depth | 22 mm | 15 – 30 |
| iPhone holder height | 105 mm | 80 – 130 |
| Holder side grip width | 10 mm | 6 – 15 |
| Holder bottom lip height | 8 mm | 5 – 12 |
| Pivot pin dia | 8 mm | 6 – 10 |
| Pivot pin length | 32 mm | 25 – 40 |
| Locking pin dia | 6 mm | 4 – 8 |
| Locking pin length | 28 mm | 20 – 35 |
Every value above is a live dimension. Open a model like this in the editor and each one becomes a slider you can drag before exporting.
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