config: Update example configs to use rotation_distance

Signed-off-by: Kevin O'Connor <kevin@koconnor.net>

config/printer-anycubic-i3-mega-2017.cfg

@@ -10,7 +10,8 @@
 step_pin: ar54
 dir_pin: !ar55
 enable_pin: !ar38
-step_distance: .0125
+microsteps: 16
+rotation_distance: 40
 endstop_pin: ^!ar3
 position_min: -5
 position_endstop: -5
@@ -21,7 +22,8 @@ homing_speed: 30.0
 step_pin: ar60
 dir_pin: ar61
 enable_pin: !ar56
-step_distance: .0125
+microsteps: 16
+rotation_distance: 40
 endstop_pin: ^!ar42
 position_endstop: 0
 position_max: 210
@@ -31,7 +33,8 @@ homing_speed: 30.0
 step_pin: ar46
 dir_pin: ar48
 enable_pin: !ar62
-step_distance: .0025
+microsteps: 16
+rotation_distance: 8
 endstop_pin: ^!ar18
 position_endstop: 0.0
 position_max: 205
@@ -41,14 +44,16 @@ homing_speed: 5.0
 step_pin: ar36
 dir_pin: ar34
 enable_pin: !ar30
-step_distance: .0025
+microsteps: 16
+rotation_distance: 8
 endstop_pin: ^!ar43
 
 [extruder]
 step_pin: ar26
 dir_pin: ar28
 enable_pin: !ar24
-step_distance: .010799
+microsteps: 16
+rotation_distance: 34.557
 nozzle_diameter: 0.400
 filament_diameter: 1.750
 heater_pin: ar10