Week 17 Assignment - applications and implications

1. Build (parts of?) the motion system in MDF, move it by hand
2. Make the motion system in Alu and POM
3. Test the motors
4. Mount the motors, run them manually (7 June: Video of motors driving the motion system.)
5. Test the spindle at fixed speed from the VFD
6. Mount the spindle
7. Mount limit switches
8. Make the wiring harness and route the cables
9. Make my controller run GRBL (ordered 16Mhz crystal if 20Mhz compilation seems complicated.)
10. Make my connection shield. (Satshakit version: .brd .sch)
11. Make three more stepper drivers. Plan B: Borrow commercial stepper drivers
12. Wire up all electronics and test with computer controlled motion
13. Spindle PWM to RPM control via the VFD Plan B: If this is too time consuming, finish it later.
14. Make a shipping case and fit everything
15. Go to Iceland, use it in bootcamps!
16. Present to the Fab lab network

After the presentation or bonus tasks:

17. Dust protection for the glide rails
18. Tune the motion system
19. Complete and fine tune my manual jogging interface
20. Build a Z-height probing spot
21. If it is heavier than 20kg, lighten it for cheaper shipping
22. Add dust extraction
23. Make easy to use mounts for different stocks
24. Adapt the shipping case to be a dust and noise enclosure.

Plan B for saving time on stepper driver production

If I run into troubles with my home-made stepper driver or just lack the time to make three more then I'll borrow commercial stepper drivers and replace them with fabbed ones later.

UPDATE: I activated Plan B. I use my own stepper driver for the X-axis and three makeblock stepper drivers for the other axis.

• Does my Stepper driver work as intended? Before making more. Do I still have time to make more before the end of the course?
  Answer: It seems to work ok, but I would like to do some updates to the design before I make more of them. See my Output devices week10 page for a list of my future updates.
• Can I run GRBL on my satshakit v2?
  Answer: Yes, no problems at all after I changed to a 16 Mhz crystal
• Does my spindle, PSU and motors work?
  Answer: Yes!

Have I in my final project shown that I can design and make::

• 2D elements?
  • Circuit board milling
  • Motion system milling
  • Case milling
  • Idea: Viny cut markings for axis directions, safety text etc?
• 3D elements?
  • Moulds for electroics enclosure
  • Chamfer on glide rails
  • 3d printed cable holders and "poke-protection" for the 220V incoming power.
• Electronics?
  • Controller based on updated Satshakit
  • Stepper drivers based on updated Satstep6600
  • Jogging and serial communication card
  • Connections shield
  • Input switches
  • Wiring harness
• Addative techniques?
  • Composite electronics enclosure
  • 3d printed cable holders and "poke-protection" for the 220V incoming power.
• Subtractive techniques?
  • Milling the motion system and case.

Have I documented my work so that:

• My work can be replicated and built on by using my files?
• The manufacturing processes used are documented?
• The raw materials and purchased components are listed in a bill of materials with prices?
• Machining time and machines use is presented?
• It is clear what work was done beforehand by others?

Is the integration of the subcomponents successful so that:

• The CNC plaform accepts digital commands from my computer and moves when I want it to?
• I can fit it inside a box that I can send as checked in luggage? (Width+Length+Heigh = less than 1580mm.)

Bonus Goal:

• Weights below 20-23 kg? (So that I can check it in without paying extra in most airlines. Less than 23kg = most airlines, less than 20 kg = all airlines.)