DOEs

We are going to finish building the spooler today. We are not going to build a guide ue to time constraints. We want focus more on input controls including the temperature and feed rate.

Peppi taught us about DOE (design of experiments).

The process that needs to be known is: what input causes what output.

• output- diameter and quality of filament

• input- temperature, height, speed

The goal of the project is to produce filament. The problem is to maintain a stable diameter.

The objective of the DOE is to control the consistency of the diameter.

Experimentation:

• Extrude for x amount of time

• Take full length and measure every 6''

• The maximum and minimum need to be reasonable

• not too fast that it will break the filament

• not too slow that it doesn't come out

• Making assumptions that the factors are linear (make a function, find relationship between minimum and maximum)

• Find the optimal between the high and the low because we are assuming it is linear

The spooler has to be finished in order to conduct the tests.

• 2 people working on spread sheet (typing up tests)

• 2 people working on winder

• 2 people working on powerpoint presentation

TIPS

• Do not start motor until tip is hot enough

• otherwise you are basically forcing through stuff that is not supposed to be forced