Added fix for Pelonis C4010L24BPLB1b-7 fan.

Marlin/Conditionals_LulzBot.h

@@ -39,7 +39,7 @@
     #error Must specify model and toolhead. Please see "Configuration_LulzBot.h" for directions.
 #endif
 
-#define LULZBOT_FW_VERSION ".12"
+#define LULZBOT_FW_VERSION ".13"
 
 // Select options based on printer model
 
@@ -502,6 +502,13 @@
 #define LULZBOT_FAN_MIN_PWM                  70
 #define LULZBOT_HOST_KEEPALIVE_FEATURE_DISABLED
 
+// For the Pelonis C4010L24BPLB1b-7 fan, we need a relative low
+// PWM frequency of about 122Hz PWM for the fan to be speed
+// controlled, this can only be accomplished via software PWM
+// with a scaling factor of four.
+#define LULZBOT_FAN_SOFT_PWM
+#define LULZBOT_SOFT_PWM_SCALE 4
+
 #if defined(LULZBOT_USE_LCD_DISPLAY)
     #define LULZBOT_REPRAP_DISCOUNT_FULL_GRAPHIC_SMART_CONTROLLER
     #define LULZBOT_SDSUPPORT

Marlin/Configuration.h

@@ -1540,18 +1540,18 @@
 // @section extras
 
 // Increase the FAN PWM frequency. Removes the PWM noise but increases heating in the FET/Arduino
-#define FAST_PWM_FAN LULZBOT_FAST_PWM_FAN
+//#define FAST_PWM_FAN
 
 // Use software PWM to drive the fan, as for the heaters. This uses a very low frequency
 // which is not as annoying as with the hardware PWM. On the other hand, if this frequency
 // is too low, you should also increment SOFT_PWM_SCALE.
-//#define FAN_SOFT_PWM
+#define FAN_SOFT_PWM LULZBOT_FAN_SOFT_PWM
 
 // Incrementing this by 1 will double the software PWM frequency,
 // affecting heaters, and the fan if FAN_SOFT_PWM is enabled.
 // However, control resolution will be halved for each increment;
 // at zero value, there are 128 effective control positions.
-#define SOFT_PWM_SCALE 0
+#define SOFT_PWM_SCALE LULZBOT_SOFT_PWM_SCALE
 
 // If SOFT_PWM_SCALE is set to a value higher than 0, dithering can
 // be used to mitigate the associated resolution loss. If enabled,