M307 S does not work
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Hello
I have a problem using the M307 S command. I am using a peltier module to cool down the bed and it works fine when S1 is used. However, if I use for example S0.5, the heater (cooler) is just turned on at all times. Any idea why that is?
Thanks in advance
/Frederik -
disable Bang Bang to enable PWM.
B0 instead of B1
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also your thermistor setting is wrong. B4138 is the default. Look up the correct value in your thermistor documentation.
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Peltier modules behave very poorly with PWM, unless you smooth the output of the PWM using a diode, inductor and capacitor.
