The green line below is what I want to achieve, and avoid the red line. Both ways can heat the chamber, right now the old system utilise the red line. Which put stress on the elements. With a better control I hope to fire the element continous at, lets say 50% ->65% ->80% during the heating cycle and 10% -> 15% -> 20% during the cooling cycle. Not zero ->100% intermittent for 2 minutes, then 4 minutes zero again.
Would you both say, that both digital (PWM) and analog control signals can fulfil the green line? If so, its just a matter of which of the alternatives that is most easy to write code for.
PS. The arrows should of course be in both directions.