Is there a simple thermocouple test that I have missed?
I guess I can write this when I get a chance - a little test program that just displays the temperature on the LCD would be a useful tool!
Maddox wrote:OK - sorry - it was on manual, not automatic. A case of RTFM
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3, 100, 0 //step (3) setpoint to (100) and immediately go so the next step
2, 0, 0 //we have no idea where the oven temperature was at the start, so wait (2) until it crosses the setpoint from the previous command (100)
1, 217, 100 //ramp (1) the setpoint to 217 over the next 100 seconds
2,0,0 //because the oven temperature is likely lagging behind the setpoint ramp from the previous step, wait (2) until it actually GETS to 217 before proceeding the next step
1, 245, 20 //ramp (1) the setpoint to 245 over the next 20 seconds
3, 255, 30 //step (3) setpoint to 255 and wait 30 seconds
1, 210, 20 //ramp (1) the setpoint to 210 over the next 20 seconds
3, 75, 30 //step (3) setpoint to 75 and immediately go so the next step
2, 5, 3 //wait (2) for input to be within (5) degrees of the of the last setpoint (75) for (3) seconds before proceeding to the next step (END)
I haven't run autotune yet, but I thought I'd get feedback from the more experienced on how this profile looks and any suggestions for tuning and or operation?
it's hard to get an idea for how well the tuning parameters are working, since the output is pegged at 100% or 0% for a large portion of the profile. the toaster is giving all it can at it still can't achieve that heat rate. if you slow down the ramp rates (increase the 3rd number in the rows that begin with "1",) you'll be more likely to a) actually achieve the requested setpoint, and b) see the pid moving the output.
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