OpenScan Mini - Printable 3D Scanner

2020-08-17 Thank you all for your great feedback! I will incorporate some (minor) design changes this week to implement those improvements. It would be great if you could let me know, how the "00 Tester" parts work on your printer! Thank you

Remarks - Please Read :)

Even though I went through several iterations, the parts might need to be change in the future! The build instruction is available here: https://en.openscan.eu/openscan-mini

The scanner works with the existing OpenScan Pi Shield (see: https://en.openscan.eu/pi-shield but you could also use a plain Raspberry Pi + breadboard with the existing pi-image provided on my website.

If you like my work and want to support the project and further developments, you can support me via: http://buymeacoffee.com/openscan

Bill of Material:

• Raspberry Pi 3B+ or 4
• Pi Camera v2.1 (8mpx) with 50cm ribbon cable
• OpenScan Ringlight + 50cm JST-XH 3P cable
• OpenScan Pi Shield
• Nema 17 Stepper Motor
• 2x A4988 Stepper driver
• 12V 2A Power Supply

• 25x M3x8mm All those parts are available on my website. Please carefully select the right product variation (due to the different cable length)

  3D Printing the parts

All parts are designed printer-friendly and are thoroughly tested. Still the print results and especially the clearances might vary from printer to printer. Please print the tester to check your printers calibration and settings.
If the parts appear to be the wrong size, you might need to scale those by a multiplier of 10.

General Print settings:

0.2mm layer height
20% infill
3-4 wall line count

Part description

(0) Tester - Print these two first to see, whether your tolerances and support settings are dialed in properly. The two parts should be sliding with as little friction as possible. You can test the fitting of the camera ribbon cable too with part 0a. Part 0b might need some sanding and elephant-foot-removal.
(1) Ring - Only part that needs support. It might also need some sanding, as it is important that this part can move relatively freely through the (2) Base.
(2) Base
(3) Backplate
(4) Frontplate (for Pi Shield)
(5) Object Holder in different sizes you might need to use a 5mm drill bit to widen the hole a bit. The number indicates the object size which can be scanned with this holder (a) 3cm, (b) 5cm, (c) 7cm and (d) 10cm
(6) Gear in three different sizes (a) 100%, (b) 102% and (c) 98% (depending on your printer you might need to print the smaller or larger one.
(7) Diffuser - which is optional but can be used to create a cross-polarizer setup with some linear polarizer foil (instructions will be on my website)

Some Scan examples

49mm compressor wheel: https://skfb.ly/6UpVJ
insect: https://skfb.ly/6TXIF
miniature: https://skfb.ly/6TXsY
And many more here: https://en.openscan.eu/scan-gallery

Future Developments

• Pi HQ Camera Support (which is working, but still lacking a proper lens for close-range photography)
• Cloud Processing ("One-Click-To-Scan-Button") via Autodesk Forge or other provider
• Many new software features like live-image-quality-analysis, simplification of the user interface
• Adding a touchscreen
• ... Feel free to share any ideas and remarks