config: Update example configs to use rotation_distance

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

config/printer-wanhao-duplicator-9-2018.cfg

@@ -8,7 +8,8 @@
 step_pin: ar61
 dir_pin: !ar62
 enable_pin: !ar60
-step_distance: .0125
+microsteps: 16
+rotation_distance: 40
 endstop_pin: ^!ar54
 position_endstop: 0
 position_max: 295
@@ -18,7 +19,8 @@ homing_speed: 30.0
 step_pin: ar64
 dir_pin: ar65
 enable_pin: !ar2
-step_distance: .0125
+microsteps: 16
+rotation_distance: 40
 endstop_pin: ^!ar24
 position_endstop: 0
 position_max: 290
@@ -28,7 +30,8 @@ homing_speed: 30.0
 step_pin: ar67
 dir_pin: ar69
 enable_pin: !ar66
-step_distance: .0025
+microsteps: 16
+rotation_distance: 8
 endstop_pin: probe:z_virtual_endstop
 position_max: 370
 position_min: -0.99
@@ -37,7 +40,8 @@ position_min: -0.99
 step_pin: ar58
 dir_pin: ar59
 enable_pin: !ar57
-step_distance: .009980
+microsteps: 16
+rotation_distance: 31.936
 nozzle_diameter: 0.4
 filament_diameter: 1.75
 heater_pin: ar4