SPINDLE/LASER pins changes

Marlin/pins_3DRAG.h

@@ -43,6 +43,8 @@
 #define RAMPS_D9_PIN 8
 #define MOSFET_D_PIN 12
 
+#define CASE_LIGHT_PIN -1     // MUST BE HARDWARE PWM but one is not available on expansion header
+
 #include "pins_RAMPS.h"
 
 //
@@ -104,3 +106,58 @@
   #define BEEPER_PIN       33
 
 #endif // ULTRA_LCD && NEWPANEL
+
+/**
+ *  M3/M4/M5 - Spindle/Laser Control
+ *
+ *  If you want to control the speed of your spindle then you'll have
+ *  have to sacrifce the Extruder and pull some signals off the Z stepper
+ *  driver socket.
+ *
+ *  The following assumes:
+ *   - the Z stepper driver socket is empty
+ *   - the extruder driver socket has a driver board plugged into it
+ *   - the Z stepper wires are attached the the extruder connector
+ *
+ *  If you want to keep the extruder AND don't have a LCD display then
+ *  you can still control the power on/off and spindle direction.
+ *
+ *  Where to get spindle signals
+ *
+ *      stepper signal           socket name       socket name
+ *                                          -------
+ *       SPINDLE_LASER_ENABLE_PIN /ENABLE  O|     |O  VMOT
+ *                                    MS1  O|     |O  GND
+ *                                    MS2  O|     |O  2B
+ *                                    MS3  O|     |O  2A
+ *                                 /RESET  O|     |O  1A
+ *                                 /SLEEP  O|     |O  1B
+ *          SPINDLE_LASER_PWM_PIN    STEP  O|     |O  VDD
+ *                SPINDLE_DIR_PIN     DIR  O|     |O  GND
+ *                                          -------
+ *
+ *  Note: Socket names vary from vendor to vendor
+ */
+#undef SPINDLE_LASER_PWM_PIN    // Definitions in pins_RAMPS.h are not good with 3DRAG
+#undef SPINDLE_LASER_ENABLE_PIN
+#undef SPINDLE_DIR_PIN
+
+#if ENABLED(SPINDLE_LASER_ENABLE)
+  #if !EXTRUDERS
+    #undef E0_DIR_PIN
+    #undef E0_ENABLE_PIN
+    #undef E0_STEP_PIN
+    #undef Z_DIR_PIN
+    #undef Z_ENABLE_PIN
+    #undef Z_STEP_PIN
+    #define Z_DIR_PIN                28
+    #define Z_ENABLE_PIN             24
+    #define Z_STEP_PIN               26
+    #define SPINDLE_LASER_PWM_PIN    46  // MUST BE HARDWARE PWM
+    #define SPINDLE_LASER_ENABLE_PIN 62  // Pin should have a pullup!
+    #define SPINDLE_DIR_PIN          48
+  #elif !(ENABLED(ULTRA_LCD) && ENABLED(NEWPANEL)) // use expansion header if no LCD in use
+    #define SPINDLE_LASER_ENABLE_PIN 16  // Pin should have a pullup/pulldown!
+    #define SPINDLE_DIR_PIN          17
+  #endif
+#endif