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But first of all let me talk about how things are done with any kind of 3D PRINTERS

Here are the steps involved in 3D Printing:

1. Design your digital model using CAD
2. Convert your CAD file into SLT
3. The slicing
4. Printing
5. Removing the finished parts from the printer
6. Post Processing Stuff

You can also check this “The Book ‘Additive Manufacturing Technologies: Rapid Prototyping to Direct Digital Manufacturing”

Groupe Assignement

Here's the direct link for this part of the assignment

Testing the 3D printer

We have found online a 3D printing model test template or as it’s called, a torture test (seriously, I didn’t even know that this kind of tests is called like that), that can do the job perfectly.

It allowed us to make different tests in one shot; an overhang test, bridging test, stringing test,sharp-corner test, tolerance test, and scale test

The Overhang :

This test allows you to know to which angle our printer can print without the need of a support !

Usually, overhangs up to 45° can still be printed without loss of quality. That’s because any layer in a 45° overhang is mostly supported by the layer beneath. In other words, each new layer has enough support to remain intact and to make printing possible. However, anything past 45 ° approaches the horizontal and becomes difficult to print. Such overhangs are prone to curling, sagging, delamination, or collapsing. Exceeding 45 degrees means every new layer has less of the previous layer to bond with. This translates to a poor quality print with droopy filament strands.

What we got: starting from 45° the quality of the printing started to get so saggy

The Bridging test:

Bridging is the printer's ability to print a layer between gaps in lower layers without support, essentially printing over thin air, creating a "bridge". It is very important that your printer can properly bridge, because many prints require some bridging.

What we got: the quality of the bridges looked perfect

The Stringing test:

Is when a print has small hairs or in extreme cases thick lines of the filament in between the outside perimeter of two print locations. The two major factors affecting stringing are Retraction and Temperature. Too high of a Temperature would cause a host of other issues in your prints so if you are mainly just experiencing stringing then Retraction is probably your issue.

What we got: the same goes for this part too, there were nothing to complain about !!

The Sharp-corner test:

This allows you to test the capability of your printer to make sharp edges without fail.

What we got: the pyramids had a partially narrow edges

Tolerance test:

This thing allows you to test the accuracy of your printing process and to determine the optimal clearance between moving parts (e.g. hinges).

What we got: this part was practically impossible to do it 'cause of the tiny measurement there 0.05~0.5

The Scale test:

To see how closely a final 3D printed part measures can be, compared to its digital model.

What we got: The diametre of both circles were compatible with

What we used?

The hardware

For the printers, we had three printers to choose from

However, we worked with Raise3D N1

• Print technology: FDM (FFF)
• Build Volume (WxDxH):8x8x8 inch/205x205x205
• Layer Resolution:0.01-0.25mm
• Filament Type: PLA/PLA+/ABS/PC/PETG/R-flex/TPU/HIPS/Bronze-filled/wood-filled
• Printing Surface : Buildtak
• Enclosure: Yes
• Nozzle Diameter: 0.4 mm(0.016 in)
• NozzleWorking Temperature:170-300°C
• Number of Nozzles: 1 (standard)/2(otional)
• Printing Speed: 10~150 mm/s
• Positioning Accuracy: XY-axes:0.0125 mm, Z-axis: 0.00125 mm

And let me say, it's hella easy to work with

The Software

For this Printing to be done, after downloading the test template as a SLT format, it's the time for the slicing software for the printing process to be done.

For this process, we used a compatible slicing software that called ideaMaker, which is an intuitive slicing software that allows the user to save their select profiles.

• Slicing Software:ideaMaker(supplied free, Simplify3D)
• Supported File types: .stl, .obj
• Supported OS: Windows XPand later versions, mac, linux
• Machine Code Type: G-code

Preparing the test model

Step1: Open the software

Step2: choose your model file

Since we downloaded the Template test as a SLT file, we only had to change some parameters like the infill, the temperture, etc..

Step3: Modify your parameters:

We set the height of the layers to 0.1mm and the first layer height to 0.15mm

We changed the extrusion width to0.4mm since the Nozzle diameter is 0.4 mm and we modified the infill density to 10% and infill pattern type to Grid!

And finally the Speed parameters!

Overall and as you can see, we changed most of the parameters and have some others par default to have our model printed!!

And now the time for the printing:

The good thing about this machine is that we can remotely control it using the software and the Wifi!

And TADA, the result

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Individual Assignement

Designing a 3D Model and print it with a 3D printer

As what I said previously; there are few steps to follow

1. Design your digital model using CAD

For this step, I used FUSION 360to make a simple model of a plantery (I know, it's so typical to make such model for such assignment, but giving the time and the availability of the materials and machines, I had to make my model as simple as possible)



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مزهرية by Hara.Lee on Sketchfab

2. Convert your CAD file into SLT

If you're using FUSION 360, this step is so easy to do; all what you have to is clicking right on the "body" that you want to convert



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3. The slicing

As for the slicing, we have to adjust some sittings here like INFILL,THE SPEED, THE TEMPERATURE, etc ~

For this part, I didn't really have that big of work, since I followed what we did in the the group assignment, the same sittings of speed, infill, temperature, etc ...




So in general; these are the sittings that I used for this part of the Assignment:



• Layer height: 0.1mm
• First layer height: 0.15mm
• Infill density: 10%
• Infill pattern: Grid
• Speed: 60mm/s
• Nozzle temperature: 205°c
• Bed temp: 60°c
• Material: PLA



after fixing the sittings on the top, I tried to reduce the size of the printed model up to 40% of the original size!





Oops!
I never was expecting this to happen!!xD
though it was so funny to see this!




So I tried other measurement, since we had a little time to do the printing: 70%


4. Printing it

TADA

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Scan anything using a 3D scanner

As for this part of the assignment, we had to use a 3d scanner, and use it to scan anything

The hardware

SENSE 2 (REALSENSE SR300) 3D SCANNER;User guide (pdf)//Review

The Software

3D Systems Sense

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All what we had to to do is putting the target on a fixed spot, and try carefully to move around it with a scanner in one hand and the computer in the other, it seems that there's an alternative way to do the scan, in other words, fixing the scanner and put the "target object" on a turntable and rotate it in front of the scanner

Anyway, we all used the first way :)

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Target object"a coffee cup"

What I got!

PS:

I ended up leaving the stool seat there under the coffee cup

I couldn't scan some sides of the coffee cup

AND TADA

coffee cup by Hara.Lee on Sketchfab

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My file(STL)

My file(F3D)

The 3D scan file(obj)

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