W-5

Case design has begun!

The thinner assembly had two jumper cables sticking out of the side, so the case had to allow for letting those pass through for now which resulted in a case with two slots in the sides.

The assembly fit, but it was impossible to test it in this case because the microUSB port was blocked. So the case was modified to add that.

This version could be plugged in, but then another problem became apparent. In order to have it plugged in, the assembly was being held up too high and the switch was blocking the cap from fully seating.

So the case was modified to move the port slot down and also to make a slot for the switch in the cap.

This is the current design.

I did test the project inside the case and one thing I had been worried about ended up being true: the case disperses vibration from the top motor too much. It becomes rather ineffective. So the case either needs to be modified so the motor can still have direct skin contact with the top of the wrist, or the motors need to be relocated to the sides of the wrist. I have not yet decided which would be better. A pro to relocating both motors is the height of the main assembly would be reduced. Height is something I am concerned about right now because the case is just too tall to be practical.

Goals accomplished from last week:

• Design a CAD model for the case

• Begin 3D printing

Next week:

• Decide on motor placement

• Refine case design, ideally shrink the size