SainSmart Coreception Troubleshooting Manual page 9

21. PID tuning guide
You have to connect to the printer with octoprint or simplfy3d or Pronterface.
Issue the below g-code:
M303 E0 S215 C10
This will take a few minutes it will try to set the hotend to 215 and then cycle it 10 times.
You will see a few values popup. But wait till you see this one.
Clasic PID
Kp: 17.230
Ki: 1.660
Kd: 44.790
PID Autotune finished ! Place the Kp, Ki and Kd constants in the configuration.h
Now you know what they are we need to save them.
Sets the PID current:
M301 P17.230 I1.660 D44.790
Save the PID to eeprom so you can restart without it resetting:
M500
If you load a new firmware it will overwrite these. But there is a trick!!
Open your robin_nano35_cfg.txt with your firmware files. And look for the below. You can
set them via the below entries.
# Type of heat manager for extruder.
PIDTEMPE 1 # 1:PID ; 0:bang-bang
>DEFAULT_Kp 17.230 # --default
>DEFAULT_Ki 1.660 # --default
>DEFAULT_Kd 44.790 # --default
#Type of heat manager for this heatedBed.
>PIDTEMPBED 1 # 1:PID ; 0:bang-bang
>DEFAULT_bedKp 118.480 # --default
>DEFAULT_bedKi 22.610 # --default
>DEFAULT_bedKd 155.200 # --default
By default on the coreception heatbed is set for bang mode. If you want to change it I
would run the same as you do for the extruder. Just set a lower temp (max of 100) and we
have to specify the bed.
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