Mechanical design
1. Idea
Due to my team member give up in Fab Academy, so I have to do it by myself. My workload is heavy , so I choice a simply design. I have interest in CNC(Computerized Numerical Control) and it will help me to build my finial project. So this topic I choice "computer control engraving machine"
2 Test one
The first design is the following ,click this link to get the A360 view.
Then I process the part using aluminum in school's ME lab.
But it can't working(moving the topic block according to step motor). I check the problem and then find the problem:Due to some operation in handworking , I didn't take care of the accuracy of position(ignore the torelance) .So it is a little different with my design.
Because this design can't working and I don't have enough material. So I change to new design with some material I have.
3. Test two:Structure design
I use fusion360 to design my project. (Reference the design process in this link)
The main component is following
4. Structure manufacture
4.1Aluminum profile
I use Cutting Machine to cut it . There are two kind of size(330,500mm) ,so I cut it one by one
- I would mark a line to identify the position;
- Fix it on the platform;
- Open the machine;
- Use hand low down the cutter
- Close the machine
4.2Aluminum block process
I use our milling machine to process it .
- Open the main power;
- Load material and use Bench vise to fix it . In the mean time use handle and rubber hammer to check it again;
- Close the safety covery;
- Run the spindle;
- Slowly change x,y,z axis, to make sure the cutter above the model
- Clock the z handle and the bench vise rise ,and make sure the material surface just touch ,and then define z0 on digital screen
- Use same method to define x0 and y0;
- In rough cutting ,every time just 1mm;
- In finish cutting ,we need cut less than 0;5mm;
- Stop machine;
- Use brake to stop the spindle ;
- Use handle to loose bench vise;
- Take material away
5. Structure assemble
I use Allen wrench to fix the machine( bolt,nut(m3,m4,m6))
After assemble
I do the cnc shield, software, grbl controller, toolpath, easel etc in the next page of machine design