Merge pull request #3676 from thinkyhead/rc_lin_advance_feature

Advance extrusion algorithm – LIN_ADVANCE

Marlin/Marlin_main.cpp

@@ -6475,6 +6475,16 @@ inline void gcode_M503() {
 
 #endif // DUAL_X_CARRIAGE
 
+#if ENABLED(LIN_ADVANCE)
+  /**
+   * M905: Set advance factor
+   */
+  inline void gcode_M905() {
+    stepper.synchronize();
+    stepper.advance_M905();
+  }
+#endif
+
 /**
  * M907: Set digital trimpot motor current using axis codes X, Y, Z, E, B, S
  */
@@ -7347,6 +7357,12 @@ void process_next_command() {
           gcode_M605();
           break;
       #endif // DUAL_X_CARRIAGE
+      
+      #if ENABLED(LIN_ADVANCE)
+        case 905: // M905 Set advance factor.
+          gcode_M905();
+          break;
+      #endif
 
       case 907: // M907 Set digital trimpot motor current using axis codes.
         gcode_M907();