6. 3D Scanning and printing¶

This week I worked on 3D design , 3D printing and 3D Scanning.

Task: 3D Scanning and Printing

Group assignment:

Test the design rules for your printer(s) Document your work and explain what are the limits of your printer(s) (in a group or individually)

For the Group Work please check the Group Page for more details.

Individual assignment:

Design and 3D print an object (small, few cm3, limited by printer time) that could not be easily made subtractively.
3D scan an object, try to prepare it for printing (and optionally print it).

Group assignment¶

Temperature is the key a factor for 3D printing. For the Group assignment I’ll test printing with different temperatures to find the best temperature for 3D printing.

I have downloaded the XYZ 20mm Calibration Cube from thingiverse.com
For printing XYZ 20mm Calibration Cube I’ll use my Formbot T-Rex 2 3D Printer with 400x400x470mm Build Size

For better bed adhesion I used blue tape

For 3D printing slicing software I used Simplify3D which has more control feature for this 3D printer.

For the filament I used PLA+ which is more stronger than normal PLA filament.

I have uploaded the STL file to the Simplify3D software I print it with different temperature settings.
Test #1: temperature 220 °C

Test #2: temperature 210 °C

Test #3: temperature 200 °C

Test #4: temperature 190 °C

The below table shows the comparison between the tests:

#	Temp.	Print Quality	X	Y	Z
1	220°C	Bad	20.3mm	20.2mm	20.05mm
2	210°C	Bad	20.35mm	20.25mm	20.15mm
3	200°C	Good	20.05mm	20.0mm	20.0mm
4	190°C	Best	20.3mm	20.3mm	20.15mm

Overall for the most accurate print 200°C is the best temperature, but if you want the best print quality then go with 190°C.

3D Design¶

In 3D design I worked on designing a Whistle using Autodesk Fusion 360. I chose whistle because it has moving ball in it and can’t not be made subtractively.

for this design I follow the tutorial form 3D Printing Whistle

Draw the 2D profile of the whistle using sketch
Extrude the sketch to 10mm
select tow faces and create 2mm shell
Cut the window
Create sphere and move it on the inner face of the whistle
Move the sphere down with 0.1mm
use the fillet for the edges and corners. -Mirror the bottom part and this will completed whistle model -finally Export to STL

3D Printing¶

for 3D Printing I used Ultimaker Cura Software and Ultimaker 3 Extended 3D printer.

Open Ultimaker Cura Software and import the STL file.
Change the orientation and make sure that the ball is in the lower layer

Change the setting of the printing.

Click in Slice and Preview to check the print

Save the file to External Drive
Now insert the External Drive to the printer and start printing
Check the first layer of the print if not sticking very well, stop the print and calibrate the bed level