RE: Smart solder reflow oven

DAB — Sun, 26 Jan 2014 20:45:34 GMT

Hi Linas,

You might want to start a finer temperature adjustment when you get within 10 degrees C of your goal.

If you reduce the rate of power you can ease into the correct temperature without the overshoot.

DAB

RE: Smart solder reflow oven

Kilohercas — Sun, 26 Jan 2014 18:58:47 GMT

without any PID loop tuning, i get 5C initial overshoot, and after that it holds temperature at +2C overshoot and 0.2C undershoot of setpoint.
I will use inverted exponential function to throttledown pwm when in gets closer to setpoint

[View:https://www.youtube.com/watch?v=oc8NPBz2kwI:520:333]

while(1)

{

Delay(0xFFF);

temperatura=(ADC_SAR_2_GetResult16()*2.0480f)/(0.005f*4096.0f);

stabilizavimas+=(150-temperatura)*10;

if(stabilizavimas<0)

{

stabilizavimas=100;

}

if(stabilizavimas>32767)

{

stabilizavimas=32767.0f;

}

TEMP_PWM_WriteCompare((int)(stabilizavimas));

}

yes, it is only PI