Originally Posted by
lakester
Thx..., an excellent article! I find myself wishing for that sort of diagnostic help a lot.
So if I understand it, per the article, the PID is an algorithmic function of the firmware..., and mentions it as a tuneable (in Marlin anyway). This is what I was trying to get at when I was speaking of tweaking heat cycling/hysteresis. In which case, the youtube vid that Chadd shared, would suggest that that the table expansion/contraction effects (if they're present in a particular machine) could be significantly improved with firmware tuning alone..., no hardware changes.
The article also mentions testing with PLA and blue tape as a means of isolating the problem, i.e., determining if a problem exists sans heating effects.