Thinner requires even less heat, if any at all.
This thread goes into more discussion about issues, where they are seen, and what causes them: tldr; heat
As with any high capacity operation, SOPs and controls need to be put in place. The idea of automation is to reduce overall human labor input into a system, not replace the exact methods human use to achieve a task.
Finding the right combo of cartridge, oil, temps, and SOPs are all as important as the machine used in successfully implementing fill automation. This is the reason why we throw in a full day of process consulting with each install.