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Thermistor calibration and PID tuning

Posted by youssefaly97 
Thermistor calibration and PID tuning
May 02, 2015 12:25PM
Hello, I'm making a printer from scratch. I'm using Teacup firmware. I just finished calibrating my thermistors. The thermistor table is kind of odd... the temperature in the table is actually 4 times the real temperature, does anyone know why or a more exact relationship than just 4X ? I also tuned the PID parameters a bit but I would like to tune it even more, any guides or pointers on that ? Also what is the acceptable error range in temperature ? It overshoots by maximum 2 degrees and which is off-set from real world temprature by about another 1 - 2 degrees.
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