Add a simple pre-heat macro to get heat soak started

Author: mattheath

printer.cfg

@@ -440,6 +440,19 @@ gcode:
 gcode:
 	SET_FAN_SPEED FAN=exhaust_fan SPEED=0.0
 
+
+[gcode_macro PRE_HEAT]
+description:
+gcode:
+	{% set BED = params.BED|default(100)|float %}
+	M140 S{BED}                              ; start bed heating
+	G28                                      ; home
+	G0 X175 Y175 Z50 F18000                  ; move to center raised a little off bed
+	M106 S255                                ; turn on fan to circulate air while pre-heating
+	SET_FAN_SPEED FAN=exhaust_fan SPEED=1.0  ; Turn on exhaust fan to get air moving in enclosure
+
+
+
 ## Convienience macros so these appear as buttons in Mainsail
 
 [gcode_macro QUERY_PROBE_PLS]