thank you for the responses
>temperature controllers with display are available for a few 10$.
Yes and no.
the cheap ones usually do not allow
- the use of different thermocouples
- cannot or it is difficult to enter the required temperature development curve
- they have one or two segment displays from which you cannot tell which phase of heating you are in
- cannot directly communicate with PC and telephone
- I can no longer monitor parameters such as energy consumption for a given "melting" list of uses, etc.
- those who can do at least part of it don't cost $10, but more like $1000 or more see for example
nanodac
last but not least, I can shop, I want to learn something new and build it myself
>
Fuzzy Logic
I generally know what it is and that it is used in similar cases. It's practically as mysterious to me in detail as determining the coefficients in a PID
Yes temperature control is actually simple from a PID point of view, easier than holding a PID ball on an inclined plane.
I expected that in every book about PID, the PID proposal for heating, be it a furnace, a kettle or a house, would be presented as a practical example. Well, it's not, at least in the books I've downloaded and looked at so far.
To approach the issue
In precision casting using the lost wax method, which is used for example by jewelers or jet engine manufacturers, different molds are used to make molds, and each mold must be hardened and heated to the temperature at which it is cast before use. Here is an example temperature profile for
UNICAST
It is baked for 14 hours with the exact temperature profile