Full Version: 3d printable models for download created with Moi3d

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A mere 34 months after purchasing Prusa MK3 3d printer kit, completed the build this week.
It prints well!
There is still much to learn.
- Brian

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Hi Brian, have you got any pictures of some of your printed objects?

- Michael

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First print of a MoI model on a Prusa i3 MK3 printer.

The MoI solid Tetrus model was chosen, and placed in the front view,
with the base on the x-axis. With MoI, the model was scaled down to better fit the printer platform. Further scaling can be done later in PruserSlicer 2.3. Either Metric or English dimensions can be used.
Exported the Tetrus in .stl format to a computer folder. Polygon number was left at mid-range. This ends MoI role, but the following tells how to get the model to the print stage.

Purchased USB based SD card reader, (Keep onn), and extra 32GB SDHC UHS-1 Card, (SanDisk). (Walmart) SD card was already formatted in FAT32.
(SD cards to use in the MK3 must be formatted in FAT32, so a 64GB card would have to be reformatted.) Prusa printer comes with an 8GB SD card, which holds only G-Code, for ~16 models. Copied 8GB SD card files to a Windows Folder, and also to the new SD card. Models should only be printed from an SD card, despite other possibilities.

PrusaSlicer is Prusa's embellishment of the open source program Slic3R, and seems very good, with added features. PrusaSlicer performs many tasks, with user inputs and interactions. Downloaded and installed PrusaSlicer 2.3, in Windows 10. Watched two UTube videos about PrusaSlicer, one by HardwareGuy, the other by Prusa (Painting support targets). Opened PrusaSlicer 2.3, and made lots of selections.
Tasks include Metric vs English dimensions, Loading the Tetrus.stl, Scaling, Printer settings, Filament selections, Infill selections, and Support selections. The Tetrus and settings can be saved in a 3MF file,
or (amf?), somewhere. Estimates of Filament usage length, and Print time is given. Print time depends upon the parameters chosen. Finally PrusaSlicer creates a GCode file. Copied the GCode file to the 32GB SD card. Either card could be used. Removed the SD card and inserted it in the MK3 printer. Ran the printer.
The GCode contains all of the CNC commands to tell the MK3 printer what to do. Several hours later...

Also came across information on PhotoGrammetry, which would not have much to do with MoI. Take a bunch of photo's of a "statue", and use free MeshRoom/ Alice Vision, to create a triangle mesh model.

- Brian

The support in the Tetrus breaks away fairly easily. So did the Triceratops supports.

Image Attachments:
TetrusBlue3.jpg  TriceratopsSkull3.jpg 

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This is really cool! What condition for a model in MoI that is 3D printable? Do all parts need to be solid? Do they need to be union-ed into one solid model?

Thanks.

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< What condition for a model in MoI that is 3D printable? "Waterproof" and always has a thickness
< Do all parts need to be solid? yes
< Do they need to be union-ed into one solid model? No

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I used MoI to make the mirror image of an existing spool holder .stl file.
Recall using .obj intermediary. (?)
The only difficulty was the saved left hand .stl export was about 1/10th the correct size.
Made a quick up scale in Prusa Slicer.
But should have done something different about the size at some step...?
Need to clarify the proper process...
- Brian

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Hi Elang,

re:
> This is really cool! What condition for a model in MoI that is 3D printable? Do all parts need to be solid?

Usually yes they will be expecting that the model is a solid.


> Do they need to be union-ed into one solid model?

It depends on the slicing software. some may be able to tolerate several solids as long as they don't have overlapping surface areas.

But I would recommend forming them into one solid.

- Michael

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