Brackets and mounts
High-Precision 3D Contact Scanner (CMM) Assembly
- Bounding box
- 250.0 × 370.0 × 212.0 mm
- Engine
- Precision B-rep
- Parameters
- 39
- Published
- October 28, 2026
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The prompt
Generate a highly detailed, scalable 3D CAD assembly of a high-precision 3D Contact Scanner (CMM) designed for manufacture, exported as a clean B-Rep solid model in STEP format (.step). Detailed Mechanical Specifications: 1. Frame & Base: - Base Plate: Heavy solid aluminum base plate (200mm x 200mm x 12mm) with a grid of M5 threaded mounting holes spaced 20mm apart. - Structural Frame: Rigid frame constructed using standard 2020 T-slot aluminum extrusions forming a stable bed-mill layout. 2. X and Y Motion Axes (100mm x 100mm Working Envelope): - Linear Guides: Dual MGN12H linear rails with matching long slider blocks on both X and Y axes for zero lateral movement. - Drive Mechanism: T8 lead screws (2mm pitch, 8mm lead) driven by standard NEMA 17 stepper motors with flexible aluminum shaft couplers (5mm to 8mm). - Anti-Backlash: Brass anti-backlash spring-loaded nuts mounted on the carriage plates. - Encoder Mounts: Bracket provisions for parallel mounting of linear optical scales along X and Y axes. 3. Z-Axis & Touch Probe Assembly: - Z Carriage: Compact vertical slide unit riding on MGN9 linear rails for minimal friction and mass. - Probe Housing: Cylindrical aluminum probe body with an internal low-stiffness compression spring (preload under 0.1 N). - Probe Tip: Vertical stylus with a 2mm diameter precision ruby ball tip at the lower end. - Contact Sensing: Integrated slot for an optical interrupter / microswitch activated by 0.2mm axial displacement of the stylus. 4. Assembly Features: - All mechanical components (rails, blocks, lead screws, motor mounts, profiles) must have realistic clearances and proper spatial alignment. - Fasteners: Clear mounting holes designed for M3, M4, and M5 socket head cap screws. - Output: Multi-body parametric CAD assembly ready for direct editing and drafting in SolidWorks.
Parameters
| Name | Value | Range |
|---|---|---|
| Base Plate Size | 200 mm | 100 – 400 |
| Base Plate Thickness | 12 mm | 6 – 25 |
| M5 Grid Spacing | 20 mm | 10 – 50 |
| M5 Hole Diameter | 5 mm | 3 – 8 |
| 2020 Extrusion Size | 20 mm | 15 – 40 |
| Frame Height | 200 mm | 50 – 400 |
| Working Envelope | 100 mm | 20 – 300 |
| Y Rail Spacing | 60 mm | 20 – 150 |
| Y Rail Length | 180 mm | 50 – 400 |
| Rail Width | 12 mm | 5 – 40 |
| Rail Height | 10 mm | 4 – 30 |
| Block Length | 35 mm | 10 – 80 |
| Block Height | 13 mm | 5 – 30 |
| Lead Screw Diameter | 8 mm | 4 – 20 |
| Motor Size | 42 mm | 20 – 80 |
| Motor Length | 40 mm | 20 – 100 |
| Coupler Outer Diameter | 18 mm | 8 – 40 |
| Coupler Length | 20 mm | 10 – 50 |
| Y Carriage X Length | 120 mm | 50 – 300 |
| Y Carriage Width | 80 mm | 30 – 200 |
| Y Carriage Thickness | 8 mm | 4 – 20 |
| X Rail Spacing | 60 mm | 20 – 150 |
| X Rail Length | 180 mm | 50 – 400 |
| X Carriage X Length | 80 mm | 40 – 200 |
| X Carriage Y Length | 120 mm | 40 – 300 |
| X Carriage Thickness | 8 mm | 4 – 20 |
| Z Column Size | 20 mm | 10 – 50 |
| Z Column Height | 120 mm | 50 – 300 |
| Z Rail Width | 9 mm | 4 – 30 |
| Z Rail Depth | 9 mm | 4 – 30 |
| Z Rail Length | 100 mm | 30 – 250 |
| Z Block Height | 15 mm | 5 – 40 |
| Probe Body Diameter | 8 mm | 4 – 20 |
| Probe Body Length | 20 mm | 10 – 50 |
| Stylus Diameter | 1.5 mm | 0.5 – 5 |
| Stylus Length | 15 mm | 5 – 50 |
| Ruby Tip Diameter | 2 mm | 0.5 – 10 |
| Anti-Backlash Nut OD | 12 mm | 6 – 30 |
| Anti-Backlash Nut Length | 15 mm | 5 – 40 |
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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