Skip to content
Snippets Groups Projects
Select Git revision
  • master default protected
  • save-for-new-template
2 results
Blame Permalink
3D Scanning and Printing.md 8.61 KiB

#3D Scanning and printing

This week I made some 3d printed tools and 3d scanned using photogrammetry.

Page Summary

  1. Testing Design rules
  2. Designing for 3D printing
  3. 3D models
  4. Creating toolpaths
  5. Printing
  6. References
  7. Photogrammetry
  8. 3D Scanning
  9. Design files
  1. Testing Design rules

I used these files on thingiverse to test design rules of the Ultimaker 3 I used in the lab.
These test geometries are designed to evaluate specific performance characteristics and motion systems in common low-cost FDM/FFF machines. Make Magazine's third annual 3D Printing Shootout was conducted using these files, created by Andreas Bastian to benchmark performance of desktop 3D printers.
How to evaluate the test geometries at: link

There are 7 individual files that help test:

  1. Dimensional Accuracy
  2. Bridging Performance
  3. Overhang Performance
  4. Negative Space Tolerance
  5. Fine Positive Features Performance
  6. XY Resonance
  7. Z Resonance

I will finish this part when I am back in the lab.

  1. Designing for 3D printing

I wanted to make simple tools this weeks, so I experimented with simple joint mechanisms. Some references that I used to develop my designs:

I first made a scaled-up version of a simple Gemclip and some other simple geometry clips. I bent one end to add a dimension, that does not allow it to be made using only one subtractive method.

simpleclips

I first made it in 2D in plan to the size and proportion I wanted, and then extruded it in Z. Later I bent the inner part so that the model could be made subtractively easily, as now it had an undercut.

side

Then I used some parts of these tranformed chopsticks reference above that I found

transformedchopsticks

And then made normal tweezers and then modified the geomtry to make it compliant like the chopsticks above.

designing

  1. 3D models

Next after, watching some videos on making compliant mechanisms, I made a simple pick-and-place plier to test out the bending.

Some tweezers we used for holding down electronic components:

I wondered if it was easier to use the tweezers with a reversed action, where applying force releases the object. And by default it holds the object. For this, I used this mechanism designed by Devin Montes - video and transformed it for the tweezers.

  1. Creating toolpaths

I used Cura to make toolpaths for my 3d prints. I uploaded my stl files, set my machine, choose PLA as my material and used these settings:

null

  1. Printing

I used an Anycubic Kossel Plus 3D printer to print with a black 1.75mm PLA filament.

null