Fix M106 extruder & fan count (#12820)

2019-01-05 14:01:35 -06:00
parent ba7e35cbab
commit bcf347403b
1 changed files with 1 additions and 1 deletions
--- a/Marlin/src/gcode/temperature/M106_M107.cpp
+++ b/Marlin/src/gcode/temperature/M106_M107.cpp
@@ -47,7 +47,7 @@
 *           3-255 = Set the speed for use with T2
 */
 void GcodeSuite::M106() {
-  const uint8_t p = parser.byteval('P', active_extruder);
+  const uint8_t p = parser.byteval('P', MIN(active_extruder, FAN_COUNT - 1));

  if (p < MIN(EXTRUDERS, FAN_COUNT)) {
    uint16_t s = parser.ushortval('S', 255);