Runs the Mini heat bed at full power.

The TAZ limits the heated bed current to 80% in order
to avoid exceeding the 15A limit on the Rambo. The
Mini needs no throttling because the bed is smaller.

The old Gladiola FW ran the bed at 100%, but since this
new branch was based on oliveoil, the conservative limit
was carried over to the Mini. This was causing temp overrun
errors on the Mini because the bed could not heat fast enough.

The PID tuning was re-run on the two-piece bed since it
had been tuned with the Mini bed running at 80% current.

Marlin/Conditionals_LulzBot.h

@@ -39,7 +39,7 @@
     #error Must specify model and toolhead. Please see "Configuration_LulzBot.h" for directions.
 #endif
 
-#define LULZBOT_FW_VERSION ".4"
+#define LULZBOT_FW_VERSION ".5"
 
 // Select options based on printer model
 
@@ -184,8 +184,6 @@
 
 #define LULZBOT_PIDTEMPBED
 
-#define LULZBOT_MAX_BED_POWER                 206
-
 #define LULZBOT_THERMAL_PROTECTION_PERIOD     15     // Seconds
 #define LULZBOT_THERMAL_PROTECTION_HYSTERESIS 30     // Degrees Celsius
 
@@ -193,11 +191,16 @@
 #define LULZBOT_THERMAL_PROTECTION_BED_HYSTERESIS 10     // Degrees Celsius
 
 #if defined(LULZBOT_IS_MINI)
-    #define LULZBOT_WATCH_TEMP_PERIOD 20    // Seconds
-    #define LULZBOT_WATCH_TEMP_INCREASE 2   // Degrees Celsius
+    // Heater current: 24V/5.5 Ohms = 4.4A
+    #define LULZBOT_MAX_BED_POWER      255  // limits duty cycle to bed; 255=full current
+    #define LULZBOT_WATCH_TEMP_PERIOD   20  // Seconds
+    #define LULZBOT_WATCH_TEMP_INCREASE  2  // Degrees Celsius
 #elif defined(LULZBOT_IS_TAZ)
-    #define LULZBOT_WATCH_TEMP_PERIOD 40    // Seconds
-    #define LULZBOT_WATCH_TEMP_INCREASE 10   // Degrees Celsius
+    // Heater current: 24V/1.6 Ohms = 15A
+    // Set Max Bed Power to 80% for a safety margin on the 15A fuse.
+    #define LULZBOT_MAX_BED_POWER      206  // limits duty cycle to bed; 255=full current
+    #define LULZBOT_WATCH_TEMP_PERIOD   40  // Seconds
+    #define LULZBOT_WATCH_TEMP_INCREASE 10  // Degrees Celsius
 #endif
 
 // Motherboard specifics and custom pins for probing.
@@ -876,11 +879,11 @@
   #define LULZBOT_DEFAULT_bedKi                 65
   #define LULZBOT_DEFAULT_bedKd                 382
 
-// Modular two piece bed (TAZ 7+)
+// Modular two piece bed (Mini 2+)
 #elif defined(LULZBOT_MINI_BED) && defined(LULZBOT_TWO_PIECE_BED)
-  #define LULZBOT_DEFAULT_bedKp                 321.57
-  #define LULZBOT_DEFAULT_bedKi                 57.73
-  #define LULZBOT_DEFAULT_bedKd                 447.82
+  #define LULZBOT_DEFAULT_bedKp                 384.33
+  #define LULZBOT_DEFAULT_bedKi                  72.17
+  #define LULZBOT_DEFAULT_bedKd                 511.64
 #endif
 
 // Acceleration, feedrate, motor steps and motor currents for XYZ vary