config: Move description of phase adjusted endstops to config-extra.cfg

Move the description of stepper phase adjusted endstops to a new
section in config-extra.cfg.  This keeps the main example config file
a little more concise.

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

config/example-extras.cfg

@@ -116,6 +116,35 @@
 #   axis is triggered.
 
 
+# Stepper phase adjusted endstops. The following additional parameters
+# may be added to a stepper axis definition to improve the accuracy of
+# endstop switches.
+#[stepper_z]
+#homing_stepper_phases:
+#   One may set this to the number of phases of the stepper motor
+#   driver (which is the number of micro-steps multiplied by
+#   four). This parameter must be provided if using stepper phase
+#   adjustments.
+#homing_endstop_accuracy: 0.200
+#   Sets the expected accuracy (in mm) of the endstop. This represents
+#   the maximum error distance the endstop may trigger (eg, if an
+#   endstop may occasionally trigger 100um early or up to 100um late
+#   then set this to 0.200 for 200um). The default is
+#   homing_stepper_phases*step_distance.
+#homing_endstop_phase:
+#   This specifies the phase of the stepper motor driver to expect
+#   when hitting the endstop. Only set this value if one is sure the
+#   stepper motor driver is reset every time the mcu is reset. If this
+#   is not set, then the stepper phase will be detected on the first
+#   home and that phase will be used on all subsequent homes.
+#homing_endstop_align_zero: False
+#   If true then the code will arrange for the zero position on the
+#   axis to occur at a full step on the stepper motor. (If used on the
+#   Z axis and the print layer height is a multiple of a full step
+#   distance then every layer will occur on a full step.) The default
+#   is False.
+
+
 # Heater cooling fans (one may define any number of sections with a
 # "heater_fan" prefix). A "heater fan" is a fan that will be enabled
 # whenever its associated heater is active. In the event of an MCU

config/example.cfg

@@ -57,32 +57,6 @@ position_max: 200
 #   direction (away from zero); if false, home towards zero. The
 #   default is true if position_endstop is near position_max and false
 #   if near position_min.
-#homing_stepper_phases: 0
-#   One may optionally set this to the number of phases of the stepper
-#   motor driver (which is the number of micro-steps multiplied by
-#   four). When set, the phase of the stepper driver will be used
-#   during homing to improve the accuracy of the endstop switch.
-#homing_endstop_accuracy: 0.200
-#   Sets the expected accuracy (in mm) of the endstop. This represents
-#   the maximum error distance the endstop may trigger (eg, if an
-#   endstop may occasionally trigger 100um early or up to 100um late
-#   then set this to 0.200 for 200um). This setting is used with
-#   homing_stepper_phases and is only useful if that parameter is also
-#   configured.
-#homing_endstop_phase: 0
-#   This specifies the phase of the stepper motor driver to expect
-#   when hitting the endstop. This setting is only meaningful if
-#   homing_stepper_phases is also set. Only set this value if one is
-#   sure the stepper motor driver is reset every time the mcu is
-#   reset. If this is not set, but homing_stepper_phases is set, then
-#   the stepper phase will be detected on the first home and that
-#   phase will be used on all subsequent homes.
-#homing_endstop_align_zero: False
-#   If homing_endstop_phase is set and this field is true then the
-#   code will arrange for the zero position on the axis to occur at a
-#   full step on the stepper motor. (If used on the Z axis and the
-#   print layer height is a multiple of a full step distance then
-#   every layer will occur on a full step.) The default is False.
 
 # The stepper_y section is used to describe the stepper controlling
 # the Y axis in a cartesian robot. It has the same settings as the