config: Update example configs to use rotation_distance

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

config/printer-velleman-k8200-2013.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_endstop: 0
 position_max: 200
@@ -20,7 +21,8 @@ homing_speed: 50
 step_pin: ar60
 dir_pin: !ar61
 enable_pin: !ar56
-step_distance: .0125
+microsteps: 16
+rotation_distance: 40
 endstop_pin: ^ar14
 position_endstop: 0
 position_max: 200
@@ -30,7 +32,8 @@ homing_speed: 50
 step_pin: ar46
 dir_pin: !ar48
 enable_pin: !ar63
-step_distance: .0025
+microsteps: 16
+rotation_distance: 8
 endstop_pin: ^ar18
 position_endstop: 0.5
 # Set position_max to 200 if you have the original Z-axis setup.
@@ -41,9 +44,10 @@ step_pin: ar26
 # Remove the "!" from dir_pin if you have an original extruder
 dir_pin: !ar28
 enable_pin: !ar24
-# You will have to calculate your own step_distance.
+# You will have to calculate your own rotation_distance.
 # This is for the belted extruder https://www.thingiverse.com/thing:339928
-step_distance: .001333
+microsteps: 16
+rotation_distance: 4.266
 nozzle_diameter: 0.400
 filament_diameter: 2.85
 heater_pin: ar10