I have it set at 100C, because of the warping that you mention, but the truth is that I was doing the temperature control manually with a switch because of the fried MOSFET of my RAMPS..8-)
Fortunately, now I finally have my Melzi running, so as soon as I have the time I will get back to it..:)
Regarding your temperature control, I am not quite sure the rational is correct. The curve of the thermistors in not linear but more like this:
[attachment 28121 Untitled1_html_25f2da62.jpg]
So it could be that at 110C you are having a completely different reading...
Again, it is just a matter of finding the upper bound at which both extruder and hotbed work fine so I think your approach of leaving it as it is is also correct...:)
EDIT:
There is quite a lot of science behind all this temperature control that IMHO is getting very complicated: [reprap.org]
Fortunately, now I finally have my Melzi running, so as soon as I have the time I will get back to it..:)
Regarding your temperature control, I am not quite sure the rational is correct. The curve of the thermistors in not linear but more like this:
[attachment 28121 Untitled1_html_25f2da62.jpg]
So it could be that at 110C you are having a completely different reading...
Again, it is just a matter of finding the upper bound at which both extruder and hotbed work fine so I think your approach of leaving it as it is is also correct...:)
EDIT:
There is quite a lot of science behind all this temperature control that IMHO is getting very complicated: [reprap.org]