bltouch

http://douay.de/2018/10/07/klipper-bl-touch-bed-mesh-and-offset-update-commit-c5d94a7/
https://github.com/drbobbob/klipper/blob/anetconfig/config/my-anet-a6.cfg

https://github.com/KevinOConnor/klipper/issues/955




#[probe]
pin: ^PC4
#   Probe detection pin. This parameter must be provided.
x_offset: -26
#   The distance (in mm) between the probe and the nozzle along the
#   x-axis. The default is 0.
y_offset: -15
#   The distance (in mm) between the probe and the nozzle along the
#   y-axis. The default is 0.
z_offset: 0.0
#   The distance (in mm) between the bed and the nozzle when the probe
#   triggers. This parameter must be provided.
speed: 5.0
#   Speed (in mm/s) of the Z axis when probing. The default is 5mm/s.
activate_gcode:
    G4 P200
    SET_SERVO SERVO=bltouch ANGLE=60
    G4 P400
deactivate_gcode:
    G4 P200
    SET_SERVO SERVO=bltouch ANGLE=90
    G4 P400

# BLTouch probe. One may define this section (instead of a probe
# section) to enable a BLTouch probe. A virtual
# "probe:z_virtual_endstop" pin is also created (see the "probe"
# section above for the details).
#[bltouch]
#sensor_pin:
#   Pin connected to the BLTouch sensor pin. This parameter must be
#   provided.
#control_pin:
#   Pin connected to the BLTouch control pin. This parameter must be
#   provided.
#pin_move_time: 0.200
#   The amount of time (in seconds) that it takes the BLTouch pin to
#   move up or down. The default is 0.200 seconds.
#test_sensor_pin: True
#   This enables a software test of the BLTouch sensor pin during the
#   first probe attempt. The test can help catch cases where the
#   BLTouch is not responding correctly. It may be necessary to
#   disable this test for some BLTouch "clones" if they consistently
#   report "BLTouch sensor test failed" errors. The default is True.
#x_offset:
#y_offset:
#z_offset:
#speed:
#   See the "probe" section for information on these parameters.


# Mesh Bed Leveling. One may define a [bed_mesh] config section
# to enable move transformations that offset the z axis based
# on a mesh generated from probed points. Note that bed_mesh
# and bed_tilt are incompatible, both cannot be defined.  When
# using a probe to home the z-axis, it is recommended to define
# a [homing_override] section in printer.cfg to home toward the
# center of the print area.
#[bed_mesh]
#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.
#samples: 1
#   The number of times to probe each point.  The probed z-values
#   will be averaged.  The default is to probe 1 time.
#sample_retract_dist: 2.0
#   The distance (in mm) to retract between each sample if
#   sampling more than once.  Default is 2mm.
#min_point:
#   An X,Y point defining the minimum coordinate to probe on
#   the bed. Note that this refers to the nozzle position,
#   and take care that you do not define a point that will move
#   the probe off of the bed. This parameter must be provided.
#max_point:
#   An X,Y point defining the maximum coordinate to probe on
#   the bed. Follow the same precautions as listed in min_point.
#   Also note that this does not necessarily define the last point
#   probed, only the maximum coordinate. This parameter must be provided.
#probe_count: 3,3
#   A comma separated pair of integer values (X,Y) defining the number
#   of points to probe along each axis. A single value is also valid,
#   in which case that value will be for both axes. Default is 3,3
#   which probes a 3x3 grid.
#fade_start: 1.0
#   The gcode z position in which to start phasing out z-adjustment
#   when fade is enabled.  Default is 1.0.
#fade_end: 0.0
#   The gcode z position in which phasing out completes.  When set
#   to a value below fade_start, fade is disabled. It should be
#   noted that fade may add unwanted scaling along the z-axis of a
#   print.  If a user wishes to enable fade, a value of 10.0 is
#   recommended. Default is 0.0, which disables fade.
#fade_target:
#   The z position in which fade should converge. When this value is set
#   to a non-zero value it must be within the range of z-values in the mesh.
#   Users that wish to converge to the z homing position should set this to 0.
#   Default is the average z value of the mesh.
#split_delta_z: .025
#   The amount of Z difference (in mm) along a move that will
#   trigger a split. Default is .025.
#move_check_distance: 5.0
#   The distance (in mm) along a move to check for split_delta_z.
#   This is also the minimum length that a move can be split. Default
#   is 5.0.
#mesh_pps: 2,2
#   A comma separated pair of integers (X,Y) defining the number of
#   points per segment to interpolate in the mesh along each axis. A
#   "segment" can be defined as the space between each probed
#   point. The user may enter a single value which will be applied
#   to both axes.  Default is 2,2.
#algorithm: lagrange
#   The interpolation algorithm to use. May be either "lagrange"
#   or "bicubic". This option will not affect 3x3 grids, which
#   are forced to use lagrange sampling.  Default is lagrange.
#bicubic_tension: .2
#   When using the bicubic algorithm the tension parameter above
#   may be applied to change the amount of slope interpolated.
#   Larger numbers will increase the amount of slope, which
#   results in more curvature in the mesh. Default is .2.