EnderSpark/Firmware/Modifications_list at main · Almostcompletedprojects/EnderSpark · GitHub

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Config.h:
Dummy thermistors the heating elements and sensors has been removed, so replace:
#define TEMP_SENSOR_0 1 by #define TEMP_SENSOR_0 999 and #define TEMP_SENSOR_BED 1 by #define TEMP_SENSOR_BED 998
Set the values to 50 and 200:
#define DUMMY_THERMISTOR_998_VALUE  50
#define DUMMY_THERMISTOR_999_VALUE 200

comment heating protections:
//#define THERMAL_PROTECTION_HOTENDS // Enable thermal protection for all extruders
//#define THERMAL_PROTECTION_BED     // Enable thermal protection for the heated bed
//#define THERMAL_PROTECTION_CHAMBER // Enable thermal protection for the heated chamber
//#define THERMAL_PROTECTION_COOLER  // Enable thermal protection for the laser cooling

//#define PREVENT_COLD_EXTRUSION
//#define EXTRUDE_MINTEMP 180

Add a second fan
#define NUM_M106_FANS 2

We will use UART2 (PA2 PA3) to communicate with the pico, this meens no more usb:
replace #define SERIAL_PORT 1 by #define SERIAL_PORT 2 check that the baudrate is at 115200

Disable nozzle park, very usefull if the wire break during a cut and you have to stop it:
//#define NOZZLE_PARK_FEATURE

Comment useles stuff like bed leveling option on the lcd:
//#define LCD_BED_LEVELING
//#define SHOW_CUSTOM_BOOTSCREEN
//#define CUSTOM_STATUS_SCREEN_IMAGE

Config _adv.h:

Add startup commands to allow to move in negative directions without homing, also very usefull if the wire is stuck and enable the fan
all the time to cool the extruder driver which is set to 200% of it's capacity
#define STARTUP_COMMANDS \
  "M211 S0\n" \
  "G91\n" \
  "M106 P0 S127\n"

increase Manual feedrate for the extruder 2 -> 10
#define MANUAL_FEEDRATE { 50*60, 50*60, 4*60, 10*60 } // (mm/min) Feedrates for manual moves along X, Y, Z, E from panel
pins_CREALITY_V4.h:
Assigne an empty pin to the heater and the bed, we need PA2 and PA3 for uart to talk to the pico and PA1 for the pump
#ifndef HEATER_0_PIN
  #define HEATER_0_PIN                     PC0   // HEATER1
#endif
#ifndef HEATER_BED_PIN
  #define HEATER_BED_PIN                   PC1   // HOT BED
#endif

Assign the pin from the heater pin to the second fan (to controll the water pump)
#ifndef FAN1_PIN
  #define FAN1_PIN                          PA1   // PUMP
#endif