Re: My own reflow controller
Posted: Sun Jul 10, 2016 12:42 pm
PID is not involved at the moment, still running fuzzy logic.
Also note: all ramps except ramp down are rate limited, the oven can go faster.
It also loses temperature faster than your extra-insulated toaster oven.
I have applied light insulation only (aluminum foil and tape), and reduced exposed volume
+ closer proximity to heater by putting the alufoil plated platform in there.
The behaviour of the heater is such, that as long as it is turned on, even at low power,
temps will almost always go up (maybe not at 220 deg C, but you get the picture).
That is the reason why I get on/off behaviour almost everywhere, if I didnt, temps would overshoot.
About the input filtering, still interested in a small schematic of your filter, but it was easier to implement
Kalman into my software than to redesign the board again.
Also note: all ramps except ramp down are rate limited, the oven can go faster.
It also loses temperature faster than your extra-insulated toaster oven.
I have applied light insulation only (aluminum foil and tape), and reduced exposed volume
+ closer proximity to heater by putting the alufoil plated platform in there.
The behaviour of the heater is such, that as long as it is turned on, even at low power,
temps will almost always go up (maybe not at 220 deg C, but you get the picture).
That is the reason why I get on/off behaviour almost everywhere, if I didnt, temps would overshoot.
About the input filtering, still interested in a small schematic of your filter, but it was easier to implement
Kalman into my software than to redesign the board again.