Reverse Engineering + CAD Drawings for POS Hardware Overlays & Exterior Panels

Project Description
I am looking for an experienced mechanical CAD designer / reverse-engineering specialist to create accurate manufacturing drawings and CAD files for several existing Android POS devices.
Important
I currently do not have factory CAD files, DXF files, STEP files, or dimensional drawings.
I can provide the physical devices/components, photos, model names, and access to the hardware, but the selected freelancer must be able to measure and reverse-engineer the parts from the physical hardware.
This is not simply a 3D rendering project.
The goal is to create accurate files that can be sent directly to manufacturers for:
- Custom hard-coated PET or polycarbonate touchscreen overlays
- Custom front bezel/branding overlays
- Replacement/removable exterior plates
- Metal and plastic branded hardware components
- Manufacturing quotations and production
Devices
The project currently includes multiple SUNMI Android POS devices, including:
- P3 Air
- P3H
- CPad 11
- T3 Pro
Specific device details, photographs, dimensions, and physical hardware access will be provided after NDA execution.
Front Touchscreen Overlay Requirements
Each device has manufacturer branding located underneath the front glass.
The intent is to manufacture a custom OEM-style front overlay that:
- Covers the full required front lens / bezel geometry
- Remains transparent over the active touchscreen
- Uses an opaque black bezel area to conceal the existing under-glass manufacturer branding
- Allows custom branding to be incorporated into the bezel
- Maintains capacitive touchscreen functionality
- Fits edge-to-edge as closely as practical
- Is designed for permanent installation
- Can be manufactured from hard-coated PET, polycarbonate, or a similar appropriate material
The CAD documentation will need to accurately identify:
- Overall front-face geometry
- Active display dimensions
- Bezel dimensions
- Logo locations
- Corner radii
- Sensor / camera / microphone openings
- Buttons or clearance areas
- Any areas that cannot be covered
- Relevant thicknesses and tolerances
Exterior Plates / Panels
Several devices also have removable exterior panels or branding plates.
Some components are:
- Aluminum / metal
- Molded plastic
- Flat or semi-flat exterior components
These parts need to be measured and reverse-engineered so manufacturers can quote replacement NEXOS-branded components.
The freelancer should capture:
- Overall dimensions
- Thickness
- Radii
- Curvature
- Mounting points
- Clips / tabs
- Screw locations
- Cutouts
- Recesses
- Edge geometry
- Relevant production tolerances
Required Deliverables
Depending on the individual component, I expect some combination of:
- Dimensioned manufacturing drawings in PDF
- DXF files for 2D/flat-profile components
- STEP/STP files for 3D components
- Native CAD source files
- 2D front-face drawings for overlay manufacturers
- Clearly documented measurements and tolerances
Please specify which CAD platform you use, such as:
- SolidWorks
- Fusion 360
- Autodesk Inventor
- AutoCAD
- Similar professional mechanical CAD software
Physical Measurement / Reverse Engineering
This is important:
The freelancer must be able to perform the measurements required to create the drawings.
I am not looking for someone who expects me to provide finished measurements or existing CAD geometry.
Please explain:
1. How you would measure/reverse-engineer the physical parts
2. Whether you use precision calipers, radius gauges, optical measurement, 3D scanning, or other tools
3. Whether you require the physical hardware to be shipped to you
4. What accuracy/tolerances you can reasonably achieve
5. What final file formats you will provide
NDA / Confidentiality
An NDA will be required before detailed project information or hardware is provided.
I have authorization from the original hardware manufacturer to proceed with white-label/custom branding work.
This project is focused on external mechanical components and branding surfaces only. No reverse engineering of internal electronics, firmware, payment security systems, or proprietary software is required.
Project Structure
I would prefer a fixed-price project rather than an open-ended hourly engagement.
Please quote separately if possible for:
- Initial measurement / reverse engineering
- Front overlay drawings
- Removable plate/panel drawings
- Final manufacturing files
- Any optional 3D scanning work
I am initially working at low production quantities, but these designs may later be used for ongoing manufacturing volumes.
When submitting a proposal, please include examples of previous mechanical reverse-engineering work, production drawings, overlays, faceplates, enclosures, or similar hardware projects.