Fixed axis directions for MKS Robin Nano S 1.3

Fixed bug with fan pins

Marlin/Configuration.h

@@ -1327,11 +1327,18 @@
 #endif
 
 #ifdef FB_5_STOCK
+#if MOTHERBOARD == BOARD_MKS_ROBIN_NANO_S_V13
+#define USR_E0_DIR false
+#define USR_X_DIR true
+#define USR_Y_DIR true
+#define USR_Z_DIR false
+#else
 #define USR_E0_DIR false
 #define USR_X_DIR false
 #define USR_Y_DIR false
 #define USR_Z_DIR false
 #endif
+#endif
 
 
 // Invert the stepper direction. Change (or reverse the motor connector) if an axis goes the wrong way.

Marlin/src/pins/stm32f4/pins_MKS_ROBIN_NANO_S_V13.h

@@ -112,8 +112,8 @@
 #define HEATER_1_PIN                        PB0   // HEATER2
 #define HEATER_BED_PIN                      PA0   // HOT BED
 
-#define FAN_PIN                             PB0  // FAN
-#define FAN1_PIN                            PB1  
+#define FAN_PIN                             PB1  // NOZZLE FAN
+#define FAN1_PIN                            PB0  // HEATSINK FAN
 //
 // Thermocouples
 //