docs: Move config reference information to new Config_Reference.md

Move all the config reference information from files in the config/
directory to a new Config_Reference.md document.

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

config/example-delta.cfg

@@ -1,15 +1,11 @@
-# This file serves as documentation for config parameters of delta
-# style printers. One may copy and edit this file to configure a new
-# delta printer. Only parameters unique to delta printers are
-# described here - see the "example.cfg" file for description of
-# common config parameters.
+# This file is an example config file for linear delta style printers.
+# One may copy and edit this file to configure a new delta printer.
 
 # DO NOT COPY THIS FILE WITHOUT CAREFULLY READING AND UPDATING IT
 # FIRST. Incorrectly configured parameters may cause damage.
 
-# The stepper_a section describes the stepper controlling the front
-# left tower (at 210 degrees). This section also controls the homing
-# parameters (homing_speed, homing_retract_dist) for all towers.
+# See docs/Config_Reference.md for a description of parameters.
+
 [stepper_a]
 step_pin: ar54
 dir_pin: ar55
@@ -18,23 +14,8 @@ step_distance: .01
 endstop_pin: ^ar2
 homing_speed: 50
 position_endstop: 297.05
-#   Distance (in mm) between the nozzle and the bed when the nozzle is
-#   in the center of the build area and the endstop triggers. This
-#   parameter must be provided for stepper_a; for stepper_b and
-#   stepper_c this parameter defaults to the value specified for
-#   stepper_a.
 arm_length: 333.0
-#   Length (in mm) of the diagonal rod that connects this tower to the
-#   print head. This parameter must be provided for stepper_a; for
-#   stepper_b and stepper_c this parameter defaults to the value
-#   specified for stepper_a.
-#angle:
-#   This option specifies the angle (in degrees) that the tower is
-#   at. The default is 210 for stepper_a, 330 for stepper_b, and 90
-#   for stepper_c.
 
-# The stepper_b section describes the stepper controlling the front
-# right tower (at 330 degrees).
 [stepper_b]
 step_pin: ar60
 dir_pin: ar61
@@ -42,8 +23,6 @@ enable_pin: !ar56
 step_distance: .01
 endstop_pin: ^ar15
 
-# The stepper_c section describes the stepper controlling the rear
-# tower (at 90 degrees).
 [stepper_c]
 step_pin: ar46
 dir_pin: ar48
@@ -76,57 +55,16 @@ control: watermark
 min_temp: 0
 max_temp: 130
 
-# Print cooling fan (omit section if fan not present).
-#[fan]
-#pin: ar9
-
 [mcu]
 serial: /dev/ttyACM0
 pin_map: arduino
 
 [printer]
 kinematics: delta
-#   This option must be "delta" for linear delta printers.
 max_velocity: 300
-#   Maximum velocity (in mm/s) of the toolhead relative to the
-#   print. This parameter must be specified.
 max_accel: 3000
-#   Maximum acceleration (in mm/s^2) of the toolhead relative to the
-#   print. This parameter must be specified.
 max_z_velocity: 150
-#   For delta printers this limits the maximum velocity (in mm/s) of
-#   moves with z axis movement. This setting can be used to reduce the
-#   maximum speed of up/down moves (which require a higher step rate
-#   than other moves on a delta printer). The default is to use
-#   max_velocity for max_z_velocity.
-#minimum_z_position: 0
-#   The minimum Z position that the user may command the head to move
-#   to.  The default is 0.
 delta_radius: 174.75
-#   Radius (in mm) of the horizontal circle formed by the three linear
-#   axis towers. This parameter may also be calculated as:
-#    delta_radius = smooth_rod_offset - effector_offset - carriage_offset
-#   This parameter must be provided.
-#print_radius:
-#   The radius (in mm) of valid toolhead XY coordinates. One may use
-#   this setting to customize the range checking of toolhead moves. If
-#   a large value is specified here then it may be possible to command
-#   the toolhead into a collision with a tower. The default is to use
-#   delta_radius for print_radius (which would normally prevent a
-#   tower collision).
 
-# The delta_calibrate section enables a DELTA_CALIBRATE extended
-# g-code command that can calibrate the tower endstop positions and
-# angles.
 [delta_calibrate]
 radius: 50
-#   Radius (in mm) of the area that may be probed. This is the radius
-#   of nozzle coordinates to be probed; if using an automatic probe
-#   with an XY offset then choose a radius small enough so that the
-#   probe always fits over the bed. This parameter must be provided.
-#speed: 50
-#   The speed (in mm/s) of non-probing moves during the calibration.
-#   The default is 50.
-#horizontal_move_z: 5
-#   The height (in mm) that the head should be commanded to move to
-#   just prior to starting a probe operation. The default is 5.