Copperhead Heatbreak for Ender 3, Under extrusion issues

[Phill1337]

tapering the outside or the inside of the PTFE tube is asking for problems. -Yeah, that was more an act of desperation.Personally I like to use Capricorn tubing as it has a smaller id and will even more precisely locate that filament as it transitions from the ptfe to the heatbreak. -I did use Capricorn tubing as well.One big question I have about your conversion is did you calibrate? That is did you first set the temp sensor calibration in your firmware to what the slice engineering thermistor is? -I only replaced the heat break. the rest is still ender 3 stock and the problem occured before the thermistor change. However i was unaware that there is a specific sensor calibration. How do i figure out the values for that and where do i find them in the firmware. And then second did you PID autotune that heater? -YesBecause Slice engineering likes to use 50 watt heater cartridges that are a bit different than the 40 watt we see everywhere else or the high precision 30 watt cartridges that E3D uses. If you have not PID autotuned your heater then it can swing over and under target and create all manner of problems and if you did not set the right sensor calibration you are not running at your commanded temp.

I have changed so many things over the last few weeks that maybe i created problems while solving them. I will go ahead an re-tune the PID. Sorry for the missing formatting. The forum somehow does not accept my line breaks when i post. Very annoying In short: i was unaware that the thermistor needs calibration itself. How do i do that?