Unfinished and untested 3d model of 120/220 developing tank

[Korbel]

Hello, I decided to share my side project with the community.

The price of the print was estimated on 300 euro, so I gave up on it. According to the printers the screwing mechanism isnt optimised for 3d plastic printing and the whole thing is untested. Hence some tweaking is needed.

The spools should be able to take both 120 and 220 films. My idea was to load one film from the inside and one from the outside so I could have two 120 films on one spool.

The black part is a light trap based on a Penrose's unilluminable room. I have tested it with blender for light leaks and it should be light proof while allowing liquids to pass. Better print accuracy is needed because it is an optical device. There is some compensation in form of two such light traps merged together.

The Penrose Unilluminable Room

Shared from Wolfram Cloud

www.wolframcloud.com

From materials you should pick something resistant to acidic and alkalic substances.

When exporting for 3d print do scale by factor of 1000, the exports in printers software behaves funky.

​

Download blender file here:

Developing Tank – Marek Korbel

marekkorbel.cz

Cheers!

 

[thinkbrown]

Took a quick look and I suspect that most of the design can be printed without too much trouble. The biggest challenge is going to be the actual developing spiral which will need to get split into two parts to print with FDM. Unfortunately I'm not skilled enough with blender to get it into a printable state. Right now none of the components are manifold and trying to get it exported as an STL results in my slicer splitting it into 88 parts.

 

[Korbel]

Took a quick look and I suspect that most of the design can be printed without too much trouble. The biggest challenge is going to be the actual developing spiral which will need to get split into two parts to print with FDM. Unfortunately I'm not skilled enough with blender to get it into a printable state. Right now none of the components are manifold and trying to get it exported as an STL results in my slicer splitting it into 88 parts.

I can split it if you explain how I know nothing of 3d printing so we can merge our powers. Or I can upload the STL files

 

[thinkbrown]

So essentially, 3d printing host software (commonly known as a slicer) takes a 3d mesh and turns it into a series of 2d toolpaths (slices). The software expects a printable object to be a single manifold mesh. I've included a couple examples of what happens currently when I export the blender objects as an STL. Essentially, to make the design printable, you'll need to join the various objects in blender into 4 final meshes that can then be printed.

I found this extension which is supposed to be able to help prepare models for printing: https://extensions.blender.org/add-ons/print3d-toolbox/. Unfortunately it seemed to remove a lot of the internal geometry of the light seal when I tried to use it, so I suspect I'm missing something.