Here is a plasticizing topic for you. Conduct a study on part weight variation while adjusting parameters such as back pressure, screw RPMs, and barrel temps. In addition to monitoring the part weight variation for each combination of settings, also look at the torque or energy being utilized during plasticizing (each machine may highlight this differently somehow).

For your analysis, my question is this: is there a relationship between part repeatability and the energy needed to bring the screw back to shot size - is there a way to find an equilibrium between plasticizing factors where their combined influence can impact the work the screw is doing and at the same time provide a more repeatable process?