This week's assignment was about designing a mobile holder using Fusion 360 CAD software and exporting DXF files to fabricate it using a laser cutting machine.
At first, I designed a mobile holder with a living hinge, but it didn't match the assignment requirements, and also, the hinge was risky to start with. So I searched for an easy one and I got inspired by this holder. Also, I found it easy to add t-slots to it.
Machine
Software
computer-aided design software that you can use for modeling, assembly, drawing, rendering, and animation to create 3D designs. It's also a tool of choice for manufacturing, machining, and industrial design.
Software for laser cutting, and engraving. It's also a G-code generator.
Material
At first, I made a free-hand sketch to determine the dimensions of my holder. I made my holder to be 10Ă—10Ă—10 cm.
Then, I started executing these dimensions in a 2D sketch on fusion 360. ( to start sketching on fusion you can watch this video).
I started with the back part with the t-slot and tabs.
I made a copy from the back to be the front but without the clock design on it.
Then, I started sketching the side part and I used fillets to give me these curves.
I sketched the bottom part to fit with the previous parts.
Finally, I tried to make all the sketches fully defined.
T-slot dimensions
Tabs dimensions
Back
Side
Front
Bottom
1)
I used the extrusion feature to determine the thickness of the part
2)
I extruded it to 3mm and selected it as a new component
We collect all components using joints in the assembly phase to function as a single design.
I assembled every 2 parts together using joints.
The mobile holder after assembling
Select the sketch you want to export as a DXF.
Press the right-click button and choose (save as DXF).
After exporting my parts to dxf files, I moved to laserwork to prepare my files for printing.
As shown in this picture there is a construction line that can't be removed on laserwork so I needed to edit it on its sketch on fusion or using another software like Corel draw
I prepared it with just one layer to cut and adjust the speed and power of the machine to be ready for cutting.
I opened the rld file on the fablab PC to make sure that all parameters were ok.
I turned on the machine.
I adjusted the focus of the nozzle and tested it using the pulse button.
I determined the origin point using the origin button to start cutting from it.
I downloaded the file from the pc to the machine.
Finally, I ran the machine to start cutting.
Final Result
I couldn't extrude this sketch so I reviewed the video of extrusion and found that it wasn't a profile to be extruded
Solution: On the sketch palette, I checked (show profile) to be able to extrude.
As shown in this video, there were shifted engraved lines out of the cutting process.
When I asked the specialist he said that it was a laser beam alignment and after searching I found the problem in the focal length, because they cleaned the machine before using it.
PS: This problem didn't affect my parts during assembly.
Using Fusion360
Wood bending with a living hinge