Optimize target_extruder, ignore T with mixing (#12432)

* Optimize target_extruder, ignore T with mixing * Give G-code Tn parity with tool_change
2018-11-14 17:33:04 -06:00
parent 5e586a6b39
commit d2bb53702a
18 changed files with 150 additions and 138 deletions
--- a/Marlin/src/gcode/config/M221.cpp
+++ b/Marlin/src/gcode/config/M221.cpp
@@ -27,7 +27,10 @@
 * M221: Set extrusion percentage (M221 T0 S95)
 */
 void GcodeSuite::M221() {
-  if (get_target_extruder_from_command()) return;
+
+  const int8_t target_extruder = get_target_extruder_from_command();
+  if (target_extruder < 0) return;
+
  if (parser.seenval('S')) {
    planner.flow_percentage[target_extruder] = parser.value_int();
    planner.refresh_e_factor(target_extruder);