Adjust PID tune timeouts and thermal watchdog

- Updated readme
- Adjusted WATCH_TEMP_PERIOD to be more tolerant
- Raised PID tuning timeout
- Adjusted default PID tuning commands
- Changed hex file naming

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 S210 C10 U1"));
+    enqueue_and_echo_commands_P(PSTR("M106 S178\nM303 E0 S210 C6 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 S60 C10 U1"));
+    enqueue_and_echo_commands_P(PSTR("M303 E-1 S60 C6 U1"));
   } else if (strcmp(SelectedDirectory, "<save eeprom>")==0) {
     SERIAL_PROTOCOLLNPGM("Special Menu: Save EEPROM");
     enqueue_and_echo_commands_P(PSTR("M500"));

Marlin/Configuration.h

@@ -420,6 +420,8 @@
  */
 #define PIDTEMPBED
 
+#define MAX_CYCLE_TIME_PID_AUTOTUNE 40L
+
 //#define BED_LIMIT_SWITCHING
 
 /**

Marlin/Configuration_adv.h

@@ -90,8 +90,8 @@
    * and/or decrease WATCH_TEMP_INCREASE. WATCH_TEMP_INCREASE should not be set
    * below 2.
    */
-  #define WATCH_TEMP_PERIOD 35                // Seconds
-  #define WATCH_TEMP_INCREASE 5               // Degrees Celsius
+  #define WATCH_TEMP_PERIOD 60                // Seconds
+  #define WATCH_TEMP_INCREASE 3               // Degrees Celsius
 #endif
 
 /**

Marlin/Version.h

@@ -48,7 +48,7 @@
    * here we define this default string as the date where the latest release
    * version was tagged.
    */
-  #define STRING_DISTRIBUTION_DATE "2018-12-13"
+  #define STRING_DISTRIBUTION_DATE "2018-12-24"
 
   /**
    * Required minimum Configuration.h and Configuration_adv.h file versions.