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Old 07-21-2020, 09:42 PM
Brian Wong Shui Brian Wong Shui is offline
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Join Date: Oct 2002
Location: Atlanta, GA
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Thatís great.

Next time the furnace is up, check to see how the furnace behaves when you upset it from steady state (i.e opening and closing the door when gathering glass). Look at output percentage. As soon as it detects the temperature is falling, you should see the output jump to 100% right then. It should overshoot the setpoint and then fallback to slightly under and then converge on the setpoint. The output percentage should be fairly steady once it finds the setpoint and not erratically jumping around.

If it takes too long to get back, try reducing the d a little. (You did record the values, right?). Too much d makes the system slow. Ideally you want the system slightly underdamped to critically damped. This will have the fastest response back to the setpoint.
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