Bruce Tai

Week 7::Computer-Controlled Machining

Learning outcomes:

Document the process of design and production work flows.

Result

Source Files.

Document the process of design and production work flows:

Practice using FreeCAD , Sketchup and Fusion360 to design this week assignment.
When I was child. I am very like rocking chair.
So this week I want to make a rocking chair by myself.

Schematic — Fig1. design for rocking chair

Schematic — Fig2. design for rocking chair

But our cnc just only can cut 450mm * 350mm size. So I redraw my design to round stool.

Finally, I used Fusion360 for my 3D design.

Schematic — Fig3. prepare to cut seat

Schematic — Fig4. design for round stool

Schematic — Fig5. design for round stool

Schematic — Fig6. design for round stool in fusion360

After design then go to CNC to cut.

In FabLab Taipei, we are using Roland MDX540 to cut what we want to cut.

Fablab's milling machine with maximum 50 cm by 40cm by 15.5 cm XYZ-axis travel.

MDX540 — Fig7. - Roland MDX540

Our local instructor Yi-Pin Huang teach us how to use this machine.

teaching — Fig8. - Instructor Teaching

teaching2 — Fig9. - Instructor Teaching

I bought 45 * 35 * 1.5 cm pieces of plywood from local material store, it is the exact size for our machine.

buy — Fig10. - Plywood from local material store

Shift X and Y to the center of your workpiece. Then press "COORD.SYSTEM" to change the USER mode.

Press X then press "ORIGIN". It can be set X value to be origin.

Also press Y then press "ORIGIN". It can be set Y value to be origin.

MDX540_2 — Fig11. - setting X Y Z value

After setting X and Y value. Use Z axis setter to set Z value.

Put on the workpiece. Then press z0 sense button. It will setting z value automatically.

For milling the plywood. The variable what is set:

6mm square Milling Cutter

Spindle: 8000 RPM

Z down position: 14.5 mm

zsetter — Fig12. - Z axis setter

zsetter2 — Fig13. - set Z value

MDX540_3 — Fig14. - Put the plywood on machine

MDX540_4 — Fig15. - Use electric drill to fixed in

MDX540_5 — Fig16. - Start milling

operation — Fig17. - Operation

Schematic — Fig18. prepare to cut seat

Schematic — Fig19. after cutting

Schematic — Fig20. cut for chair leg

Fine Working:

Schematic — Fig21. after cutting

Schematic — Fig22. after cutting

Use the rasp tool for flat surfaces of plywood.

final3 — Fig23. rasp tool for flat surfaces

Schematic — Fig24. chair leg

Schematic — Fig25. combine with seat and leg

Schematic — Fig26. chair

Schematic — Fig27. final view

The result looks great! I can sit in this chair or I can put something on it for shelves.

Source Files: