Tweak PID & G26

Thanks to some great feedback from @RolandRosenfeld I did some small tweaks:

- Adjusted auto PID tune parameters
- Replaced manufacturer PID values
- Minor changes to the readme
- Raised retraction on G26 Mesh Test
- Merged latest bugfix from derhopp
- Added latest hex files

Co-Authored-By: Roland Rosenfeld <roland@spinnaker.de>

Marlin/AnycubicTFT.cpp

@@ -203,10 +203,10 @@ void AnycubicTFTClass::HandleSpecialMenu()
     SpecialMenu=true;
   } else if (strcmp(SelectedDirectory, "<auto tune hotend pid>")==0) {
     SERIAL_PROTOCOLLNPGM("Special Menu: Auto Tune Hotend PID");
-    enqueue_and_echo_commands_P(PSTR("M106 S178\nM303 E0 S240 C8 U1"));
+    enqueue_and_echo_commands_P(PSTR("M106 S178\nM303 E0 S210 C10 U1"));
   } else if (strcmp(SelectedDirectory, "<auto tune hotbed pid>")==0) {
     SERIAL_PROTOCOLLNPGM("Special Menu: Auto Tune Hotbed Pid");
-    enqueue_and_echo_commands_P(PSTR("M303 E-1 S80 C8 U1"));
+    enqueue_and_echo_commands_P(PSTR("M303 E-1 S60 C10 U1"));
   } else if (strcmp(SelectedDirectory, "<save eeprom>")==0) {
     SERIAL_PROTOCOLLNPGM("Special Menu: Save EEPROM");
     enqueue_and_echo_commands_P(PSTR("M500"));

Marlin/Configuration.h

@@ -380,9 +380,9 @@
   // If you are using a pre-configured hotend then you can use one of the value sets by uncommenting it
 
   // i3 Mega
-  #define  DEFAULT_Kp 16.43
-  #define  DEFAULT_Ki 1.03
-  #define  DEFAULT_Kd 55.79
+  #define  DEFAULT_Kp 15.94
+  #define  DEFAULT_Ki 1.17
+  #define  DEFAULT_Kd 54.19
 
   // Ultimaker
   //#define  DEFAULT_Kp 22.2

Marlin/G26_Mesh_Validation_Tool.cpp

@@ -44,7 +44,7 @@
   #endif
 
   #define EXTRUSION_MULTIPLIER 1.0
-  #define RETRACTION_MULTIPLIER 4
+  #define RETRACTION_MULTIPLIER 6
   #define PRIME_LENGTH 25.0
   #define OOZE_AMOUNT 2.25
 

Marlin/pins_TRIGORILLA_14.h

@@ -133,9 +133,9 @@
 		#define LCD_PINS_D7 29
 
 		#ifdef REPRAP_DISCOUNT_SMART_CONTROLLER
-			#define BEEPER_PIN 31
+			#define BEEPER_PIN 37
 
-			#define BTN_EN1 33
+			#define BTN_EN1 31
 			#define BTN_EN2 33
 			#define BTN_ENC 35
 

README.md

@@ -76,13 +76,14 @@ This firmware is perfectly calibrated for my own machine with TMC2208 (1.015V on
 ### PID tuning
 
 - Turn on parts cooling fan, I recommend running it at 70% because of the 12V mod (`M106 S191`)
-- Send `M303 E0 S230 C8 U1` to start extruder PID auto tuning
+- Send `M303 E0 S210 C10 U1` to start extruder PID auto tuning
 - Wait for it to finish
-- Send `M303 E-1 S80 C8 U1` to start heatbed PID auto tuning
+- Send `M303 E-1 S60 C10 U1` to start heatbed PID auto tuning
 - Wait for it to finish
 - Save with `M500`, turn off fan with `M106 S0`
+Note: These commands are tweaked for PLA printing at up to 210/60°C. If you run into issues at higher temperatures (e.g. PETG & ABS), simply change the `S` parameter to your desired temperature
 
-**Reminder**: PID tuning sometimes fails. If you get fluctuating temperatures or the heater even fails to reach your desired temperature, you can always go back to the stock settings by sending `M502` and `M500`.
+**Reminder**: PID tuning sometimes fails. If you get fluctuating temperatures or the heater even fails to reach your desired temperature, you can always go back to the stock settings by sending `M301 P15.94 I1.17 D54.19` and save with `M500`.
 
 ### Bonus: Manual Mesh Bed Leveling
 
@@ -109,6 +110,7 @@ M501
 M420 S1
 ```
 - Enjoy never having to worry about an uneven bed again!
+Note: By default, this firmware probes 25 points. This might take little while, if you you don't need an as precise mesh, you can change the grid size by sending `G29 Px` before starting the levling. E.g., `G29 P3` results in a 3x3 mesh, thus only 9 points.
 
 ### Testing your bed leveling