3D scanning and Priting

• *MINI* All in one 3D print test file by Marian Trpkos

In this case we did as a group print the earlier file. We see this test as a very labour intensive test for the 3d Printer

• Scale Test: +- 0.5 mm
• Stringing Test: The performance was fully succesfull, as we see no stringing between the columns.
• Diamenter Test:
• Hole Test: Was no problem as the rectangular and circular holes had no problem showing.
• Bridging Test: We are able to see the printer had no problems with the 2-10 mm as a extended beam. We see a tad of webbing between the 4mm and 10 mm beam. And we see the final 20 and 25mm bridge having an overhang concave curvature.
• Support test: The actual support was flawless, its probably the most stabel part of the prining setup. It was done in the same PLA material yet
• Overhang Test: In the front side (extruder side) actually holds its resolution properly up until before the 80 deg slope. On the back side we see a groselly overacumulation of material. It starts after the 30 deg mark and at the 80 deg it doubles its thickness. This test is an especially hard one considering the magnitude of an object with this level of curvature is not common. And in most uses the extruder side is the usefull side, if not, I better make it so to create a proper finish.
• Lettering the best results are given when letters are in 45 deg. Embeded letters most lightly require to be as big as the "3D printer test" title.

The final product was probably a bit of a let down. I was expecting the karabiner to work when taken out of the printer, yet the part sort of fused together.
1. the separation was too tight .5 mm is not enough.
2. the orientation most lightly fused both parts. In order for it to work it most lightly have to be 2 parts or both joint parts have to self support independently as not to touch one another or share support material.

• Onshape file

• Actual file: karabiner v1

In printing the part, Cura pointed out that it could not print the lettering. I had it embosed thinking it might make it better for the printer to access it. It turns out the software was not able to pick up the lettereing at its original size.

Inside cura I scale this file x3 ~ in order to get the larger "karabiner" lettering printed. The smaller text "fablab's" was basically ignored due to its small size. You can see the render in green.

I later took a look at mechanisms that come out of the 3D printers working and I realized they mantain self supporting strucuters at the moment they are being printed.

Here is another round of printing the karabiner in the printer.

After drawing the kaliper v2, I decided to test it out with no support material, ideally so the joints dont get cluged up and the mechanism runs smoothly.

It did not work.

Here is the part printed with support material.

• v2 karabiner files

The following is a good example, where every component that will move is self supported at the printing time.The file file is up on thingiverse under "true szuare of fabric of thybes 2.0 by ChrisVZ and find it here.

Protecting the ISP

As a result of previus accidents, i also decided to create a case for the isp in order to protect it. As to utilize my time in crating new pbc's and not have them brake. With this inspiration I developed a case for the Hello world isp.

Following are the settings used in 3D printing

• Material PLA
• Profile: Fine -0.1mm
• Layer Height .1 mm
• Printing Temperature: 200 deg C / Build plate temp: 60deg C
• Speed: 60mm/s
• Cooling: Fan Speed: 100%
• Support: Generate support ☑ / Support Placement: Everywhere / Support overhang angle: 50<.li>

In green is the preliminary design. Its a base and a cover, with an opening for the 6 pin connector to plug into.

We later see the cura file prep. It showed the top of the cover in red. At the time I did not know what it ment, and shruged it off.

After the print it came out.. mostly printed. I can now interprate the red area as area the 3D print cannot actually access. Maybe because of the curvature.

My new hypothesis

Soemthing went totaly wrong on the exporting process, as the cura recognized the nicely formed part as 2 bodies. The wierdest thing ever. .

I actually made a fairly complex curvature I was proud of. The extruded probably cannot access without it's extruded touching its surrounding.

Designing the file:

In this case, I was hoping for a smooth nice surface on top and a a method to practice some of my compelx geometry in solidworks I have stated to forget.

In this case I actualy constructed the bottom extrusion, and the top extrusion of the to cover.

later creted profiles based on the ending bottom and top surfaces of the extrusions as planes and guide for the comming loft.

The after coping an entity on each outside profile of the extrusions, I used the right and front planes to create guides.

I later asked solidworks to use the entities as start and stop profiles for the loft, and to do so by following the guide lines.

Once this lofted surface was created, I offested the surface, somehow created a solid and joint it with both extrusions.

Possibly the longest modeling for a programming cover that didnt acutally fit its case.

For anyone outhere plannning on doing fancy cadwork as a practice hobby: get your measurements straight first, and simple shapes. The jump into the complex srufaces later.

The bottom cover, that actually is still in use was just 2 extrusions, one for the base and the next one for the walls. You know... functional. I guess it could of had some curvature continous fillets on the bottom, oh well..

It looks like I should have left give in relation to the isp in order to properly fit. I left the dimensions exact to .5mm of tolerance.
It can be seen that in order to insert it, the plastic has to actually flex outwards. At the same time, the connector didnt fit either. It most lightly shrunk as well.

• ISP Cover Files

Debugging

In printing we found out at the beguinnning the printer was too hot, when we started printing all the groups individual prints. This was causing the parts to slightly bend.

Here I share the scann file of my self: Download Here

In order to actually share the link I am required to upgrade inside the "Modelo" platform. Otherwise I can only share for 1 day.