Body IM Update

We finished our optimization. Here is the result of the final setup:

Unit (in)

Outer Diameter

Inner Diameter

Thickness (injection side)

Thickness (Weld side)

Height

O.1	2.508	2.38	0.063	0.063	0.684
O.2	2.507	2.384	0.061	0.064	0.688
O.3	2.509	2.384	0.062	0.064	0.687
O.4	2.509	2.385	0.061	0.066	0.689
O.5	2.509	2.381	0.063	0.063	0.686
O.6	2.51	2.382	0.061	0.065	0.69
O.7	2.507	2.383	0.062	0.065	0.688
O.8	2.507	2.379	0.062	0.064	0.689
O.9	2.51	2.385	0.06	0.064	0.688
O.10	2.508	2.38	0.062	0.066	0.686
Average	2.5084	2.3823	0.0617	0.0644	0.6875
Std	0.00117379	0.00221359	0.000948683	0.00107497	0.00177951

Comment: OD and ID are slightly bigger than the design. The thickness is fairly uniform everywhere. Since the face IM team increased the face diameter, they fit really well together.

Updated Gantt Chart:

Body IM Test Run and Updated Gantt Chart

The Body IM team (Javier & Xiaoyue) did a test run of the body injection molding. The body turned out well (see pictures below). The shims and nuts were successfully embedded in the plastic, and there were few flashes. We will do the optimization of injection setup next week.

Pic 1: Results of test run.

Pic 2: Nuts embedded in the body.

Pic 3: IM part before cutting out the runner.

Pic 4: Javier in the shop =)

 

Also, here is an updated Gantt Chart of the Body IM team. 

Circuit Testing

Here's a video of the circuit in action. It consists of two ball tilt switches, four LEDs, and a 3V coin cell battery. The circuit is taped to the outside of a yo-yo to simulate proper spinning conditions.