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WARNING:
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--------
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This is an experimental modification to allow PID on your bed heater.
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This will run at the same frequency as the main PID loop. Make sure you heater FET or SSR can do this. I use a fotek SSR-10DA and it's fine
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add something like this to you configuration (pulling this branch will get you this
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~~~~~~~~~~~~~~~~~~~~
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#define PIDTEMPBED
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//from FOPDT model - kp=.39 Tp=405 Tdead=66, Tc set to 79.2, argressive factor of .15 (vs .1, 1, 10)
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#define DEFAULT_bedKp 10.00
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#define DEFAULT_bedKi .023
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#define DEFAULT_bedKd 305.4
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~~~~~~~~~~~~~~~~~~~~
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Autotune works for the bed. Give it an "M303 E-1 C8 S90" to run autotune on the bed at 90 degrees for 8 cycles.
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