Brackets and mounts
VISHWAKARMA_Tier2_Gateway (exploded multi-part)
- Bounding box
- 1161.5 × 132.0 × 108.0 mm
- Engine
- Precision B-rep
- Parameters
- 52
- Published
- October 25, 2026
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The prompt
Do not use your earlier assumptions. Use the revised lean spec below and proceed now. Create a NEW design named "VISHWAKARMA_Tier2_Gateway". Build it as a parametric script, in stages, and confirm after each stage. SPEC (units: mm) - Compute: Raspberry Pi 4B (85 x 56 x 17, M2.5 holes on 58 x 49 pattern). NO Jetson, NO Pi 5. - Connectivity: ONE LoRa module (SX1278/RFM95, about 17 x 16 x 3) plus the Pi's built-in WiFi/Ethernet. NO RS-485, NO CAN. - Power: USB-C input from an EXTERNAL power bank. NO internal battery bay, NO divider wall. Single chamber. - Enclosure: 140 L x 100 W x 55 H external, wall 2.5, floor 2.5, lid 3, vertical corner radius 4, edge fillet 1.5, tolerance 0.3. USER PARAMETERS first: box_L=140, box_W=100, box_H=55, wall=2.5, lid_thk=3, corner_r=4, tol=0.3. STAGE 1 - Base_Shell and Lid (separate components) - Open-top base with 4 corner screw bosses (OD 8, 4.2 hole for M3 heat-set inserts, 5 deep). - Lid with an inner lip (2 mm tall, tol clearance), 4 M3 clearance holes, a 8-slot vent grille (2 x 30) over the CPU area, and a 3 mm LED light-pipe hole. STAGE 2 - Internals - 4 Pi standoffs (6 mm tall, M2.5) printed into the floor. - Simplified Pi 4B body on the standoffs: Ethernet/USB end facing one short wall, USB-C side facing a long wall. - LoRa module on a small raised mount in a corner, 15 mm free space beside the Pi for cables. STAGE 3 - Cutouts and mounts - Ethernet + 2x USB-A cutout on the short wall, USB-C cutout on the long wall (0.5 clearance each). - SMA bulkhead hole (6.5 with anti-rotation flat) near the LoRa module, plus a 100 mm whip antenna reference body. - One PG7 cable gland hole (12.5) on the wall opposite the Pi ports. - 2 wall-mount tabs on the long sides, 4 mm thick, with 5 mm slotted holes. STAGE 4 - Appearance and outputs - Base and Lid in matte dark grey (PETG), Pi green, LoRa blue, antenna black. - Isometric view, exploded view (Animation workspace), 3-view drawing with dimensions, BOM, STEP + STL export. STAGE 5 - FEA (Simulation, Static Stress, PETG: E 2100 MPa, yield 50 MPa) - Study 1: fix the wall-tab holes, apply 60 N (2 kg x 3 safety factor). - Study 2: fix the corner bosses, apply a 30 N distributed load on the lid. - Report max von Mises stress, max displacement, minimum safety factor, and the critical stress nodes. If the safety factor is under 3, thicken the tabs or add ribs and re-run. Start with Stage 1 now. Do not ask me to confirm the dimensions again.
Parameters
| Name | Value | Range |
|---|---|---|
| Enclosure Length | 140 mm | 80 – 260 |
| Enclosure Width | 100 mm | 60 – 200 |
| Enclosure Height | 55 mm | 25 – 120 |
| Wall Thickness | 2.5 mm | 1.2 – 5 |
| Floor Thickness | 2.5 mm | 1.2 – 6 |
| Lid Thickness | 3 mm | 1.5 – 8 |
| Vertical Corner Radius | 4 mm | 1 – 15 |
| Fit Tolerance | 0.3 mm | 0.1 – 0.8 |
| Edge Fillet | 1.5 mm | 0.3 – 1.2 |
| Corner Boss OD | 8 mm | 5 – 14 |
| M3 Heat-Set Hole Dia | 4.2 mm | 3 – 5.5 |
| Heat-Set Hole Depth | 5 mm | 2 – 12 |
| Boss Top Below Rim | 8 mm | 3 – 25 |
| Pi Standoff Height | 6 mm | 3 – 20 |
| Pi Standoff OD | 5.5 mm | 3 – 10 |
| Pi Standoff Tap Dia | 2.5 mm | 1.5 – 4 |
| Wall Tab Thickness | 4 mm | 2 – 8 |
| Wall Tab Width | 36 mm | 15 – 70 |
| Wall Tab Protrusion | 16 mm | 8 – 35 |
| Tab Slot Width | 5 mm | 3 – 10 |
| Tab Slot Length | 11 mm | 5 – 20 |
| Lid Lip Height | 2 mm | 1 – 6 |
| Lid Lip Wall | 1 mm | 0.5 – 2 |
| M3 Clearance Hole | 3.4 mm | 2.5 – 5 |
| Vent Slot Length | 30 mm | 10 – 60 |
| Vent Slot Width | 2 mm | 1 – 6 |
| Vent Slot Count | 8 pcs | 2 – 16 |
| Vent Slot Pitch | 5.5 mm | 3 – 15 |
| LED Light-Pipe Hole | 3 mm | 1.5 – 8 |
| Pi 4B Length | 85 mm | 60 – 110 |
| Pi 4B Width | 56 mm | 40 – 80 |
| Pi 4B Height | 17 mm | 8 – 30 |
| Pi Mounting Hole Dia | 2.75 mm | 2 – 4 |
| Pi Hole Spacing X | 58 mm | 30 – 80 |
| Pi Hole Spacing Y | 49 mm | 25 – 70 |
| Pi Centre X Offset | -12 mm | -40 – 20 |
| LoRa Module Length | 17 mm | 10 – 30 |
| LoRa Module Width | 16 mm | 10 – 30 |
| LoRa Module Height | 3 mm | 1.5 – 8 |
| SMA Body Diameter | 10 mm | 5 – 18 |
| SMA Overall Length | 20 mm | 10 – 40 |
| SMA Neck Diameter | 6.4 mm | 3 – 10 |
| SMA Neck Length | 8 mm | 3 – 16 |
| Anti-Rotation Flat Depth | 1.5 mm | 0.3 – 3 |
| Antenna Length | 100 mm | 40 – 200 |
| Antenna Base Diameter | 8 mm | 4 – 16 |
| Antenna Base Height | 12 mm | 4 – 30 |
| Antenna Tip Diameter | 2 mm | 0.8 – 6 |
| PG7 Max Diameter (Hex AF) | 20 mm | 10 – 32 |
| PG7 Overall Length | 30 mm | 15 – 50 |
| PG7 Thread Diameter | 12.5 mm | 6 – 22 |
| Exploded Layout Gap | 180 mm | 120 – 320 |
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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