Yeah….forget step 3. Using the Semitec or Semitec-104NT4 doesn’t play well with the Smoothieboard. I had upgraded to a smoothieboard and started immediately having runaway temps issues. I was so burnt out by that point that I gave up on 3D printing for a year. After some playing around and reviewing http://smoothieware.org/temperaturecontr... I found that the only fix for this was to remark out #temperature_control.hotend.thermistor (line 126) and add
(Note the above is for the Semitec 104NT4 if you are using a different version, then reference smoothieware’s site above for the correct Steinhart Hart values or the corresponding beta values.)
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