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pid_tuning_ea [2016/07/15 21:23]
Matthew Upp created
pid_tuning_ea [2020/04/05 05:42]
Matthew Upp
Line 2: Line 2:
 (by Ethan Anderson) (by Ethan Anderson)
  
-The factory settings cause indefinite temperature swings of ±5ºC with a period of 60-80 seconds. M303 (PID auto-tune) causes the printer to crash/​reboot in firmware versions preceding 18.37. In 18.37 and later firmwares, M303 works, but the results are on par with the PID settings from the factory. ​ The stored value of the I parameter is 1000th of what it actually uses and autotunes to, therefor after M301 autotune you will need to manually reset the M301 I value to 1/1000th ​of what the autotune reports.+//(The information below applies mostly to Motion firmware 20 & lower)// 
 + 
 +The factory settings cause indefinite temperature swings of ±5ºC with a period of 60-80 seconds. M303 (PID auto-tune) causes the printer to crash/​reboot in firmware versions preceding 18.37. In 18.37 and later firmwares, M303 works, but the results are on par with the PID settings from the factory. ​ The stored value of the I parameter is 1000th of what it actually uses and autotunes to, therefor after M301 autotune you will need to manually reset the M301 I value to 1/100th of what the autotune reports.
  
 Solved by starting from square one with P, I, and D values at zero. Raised P until the temperature stabilized, then raised I to properly offset the stabilized temperature to match the requested temperature,​ then experimented with D to minimize the time taken to stabilize. Solved by starting from square one with P, I, and D values at zero. Raised P until the temperature stabilized, then raised I to properly offset the stabilized temperature to match the requested temperature,​ then experimented with D to minimize the time taken to stabilize.
pid_tuning_ea.txt · Last modified: 2020/04/05 05:42 by Matthew Upp