Various fixes.

- Restored MIN_TEMP error on disconnecting head.
- Restored WORKSPACE_OFFSETS (as requested by forum user).

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 ".2"
+#define LULZBOT_FW_VERSION ".3"
 
 // Select options based on printer model
 
@@ -124,11 +124,37 @@
 #endif
 
 // Shared values
-#define LULZBOT_STRING_CONFIG_H_AUTHOR        "(Aleph Objects Inc., LulzBot Diffusion)"
+#define LULZBOT_STRING_CONFIG_H_AUTHOR        "(Aleph Objects Inc., LulzBot Git Repository)"
 #define LULZBOT_BUFSIZE                       10
 #define LULZBOT_EEPROM_SETTINGS
 #define LULZBOT_EMERGENCY_PARSER
 
+// Marlin 1.1.5 no longer issues MIN_TEMP errors and appears to handle
+// thermal runaway via other means. However, since our users expect a
+// MIN_TEMP error when disconnecting their print head, this could be
+// perceived as a safety issue. This is a workaround in "temperature.cpp"
+// to re-enable that functionality.
+
+#define LULZBOT_MIN_TEMP_WORKAROUND \
+    static int delayBeforeStartMeasuring = OVERSAMPLENR; \
+        if(delayBeforeStartMeasuring > 0) { \
+            delayBeforeStartMeasuring--; \
+        } else { \
+            if (current_temperature[e] > HEATER_0_MAXTEMP) max_temp_error(0); \
+            if (current_temperature[e] < HEATER_0_MINTEMP) min_temp_error(0); \
+        }
+
+// Marlin 1.1.4 has changed the behavior of G92 so that
+// it changes software endstops, making it less useful
+// for making position adjustments after hitting an
+// endstop. We need the old behavior of G92 for the
+// Yellowfin start GCODE and it is also a useful
+// feature for custom height adjustments (something
+// requested in the forums). The following restores
+// the old behavior.
+
+#define LULZBOT_G92_BACKWARDS_COMPATIBILITY
+
 // Prior branches of the LulzBot firmware used G26
 // to reset a probe failed condition. Marlin upstrem
 // now redefines that for unified bed leveling. The
@@ -371,13 +397,6 @@
 #define LULZBOT_Z_CLEARANCE_DEPLOY_PROBE      5
 #define LULZBOT_Z_CLEARANCE_BETWEEN_PROBES    5
 
-/* We use G92 for adjusting the coordinate space in the Yellowfin toolhead,
- * however upstream Marlin has made it so G92 adjusts the software endstops,
- * which makes G92 unusable for our use case. As an interim measure, revert
- * to the previous behavior of G29 using NO_WORKSPACE_OFFSETS
-*/
-#define LULZBOT_NO_WORKSPACE_OFFSETS
-
 /* On the Finch Aero toolhead, we need to disable the extruder
  * motor as it causes noise on the probe line on Foxglove Minis.
  */

Marlin/Configuration_adv.h

@@ -1253,7 +1253,7 @@
  *  - M206 and M428 are disabled.
  *  - G92 will revert to its behavior from Marlin 1.0.
  */
-#define NO_WORKSPACE_OFFSETS LULZBOT_NO_WORKSPACE_OFFSETS
+//#define NO_WORKSPACE_OFFSETS
 
 /**
  * Set the number of proportional font spaces required to fill up a typical character space.

Marlin/Marlin_main.cpp

@@ -5914,7 +5914,7 @@ inline void gcode_G92() {
         current_position[i] = parser.value_axis_units((AxisEnum)i);
         if (i != E_AXIS) didXYZ = true;
       #else
-        #if HAS_POSITION_SHIFT
+        #if HAS_POSITION_SHIFT && !defined(LULZBOT_G92_BACKWARDS_COMPATIBILITY)
           const float p = current_position[i];
         #endif
         const float v = parser.value_axis_units((AxisEnum)i);
@@ -5923,7 +5923,7 @@ inline void gcode_G92() {
 
         if (i != E_AXIS) {
           didXYZ = true;
-          #if HAS_POSITION_SHIFT
+          #if HAS_POSITION_SHIFT && !defined(LULZBOT_G92_BACKWARDS_COMPATIBILITY)
             position_shift[i] += v - p; // Offset the coordinate space
             update_software_endstops((AxisEnum)i);
 

Marlin/temperature.cpp

@@ -726,6 +726,8 @@ void Temperature::manage_heater() {
 
   HOTEND_LOOP() {
 
+    LULZBOT_MIN_TEMP_WORKAROUND
+
     #if HEATER_IDLE_HANDLER
       if (!heater_idle_timeout_exceeded[e] && heater_idle_timeout_ms[e] && ELAPSED(ms, heater_idle_timeout_ms[e]))
         heater_idle_timeout_exceeded[e] = true;