```
(author: Chris P)
(version: 0.1)
(date: 04/26/19)

(Probe rect pocket center measure x and widths, find xy center position)
(Start probe position is over left side edge of pocket wall)
(inside the step off width distance and within max z distance)
(ensure all settings have been set properly according to help diagrams)

o<probe_rect_pocket> sub

  (uses NGCGUI style arg spec)
  (number after "=" in comment is default value)
  #<probe_tool_number> = #1    (=99)
  #<max_z_distance> = #2       (=0.5000)
  #<max_xy_distance> = #3      (=0.5000)
  #<xy_clearance> = #4         (=0.1000)
  #<z_clearance> = #5          (=0.1000)
  #<step_off_width> = #6       (=0.5000)
  #<extra_probe_depth> = #7    (=0.0000)
  #<probe_slow_fr> = #8        (=0.0)
  #<probe_fast_fr> = #9        (=10.0)
  #<calibration_offset> = #10  (=0.0000)
  #<x_hint> = #11              (=1.0000)
  #<y_hint> = #12              (=1.0000)
  #<diameter_hint> = #13       (=1.0000)
  #<edge_width> = #14          (=0.5000)

  (Cancel G92 offsets)
  G92.1

  #<workspace_x> = #[5201 + [20 * #5220]]
  #<workspace_y> = #[5202 + [20 * #5220]]

  (Probe Tool Safety Check)
  o<110> if [#5400 NE #<probe_tool_number>]
  (MSG, Specified probe tool #<probe_tool_number> not in spindle, aborting)
   o<probe_rect_pocket> return
  o<110> endif

  (Probe Diameter)
  #<probe_diameter> = #5410

  (remove probe tip diam and cal offset from probed width calculations)
  #<probe_diameter_offset> = [#<probe_diameter> - [#<calibration_offset> * 2]]

  (Call sub "probe_z_minus_sub" to Probe top of Workpiece)
  o<probe_z_minus_sub> call [#1][#2][#5][#8][#9]

  (Probe X Positioning Move, Step Off Width)
  G91
  G0 X[#<step_off_width>]

  (Probe X Positioning Move, to Probing Depth)
  F[#<probe_fast_fr>]
  G1 Z-[#<z_clearance> + #<probe_diameter> + #<extra_probe_depth>]

  (Call sub "probe_x_minus" to Probe x- side of Workpiece)
  o<probe_x_minus> call [#1][#3][#4][#8][#9][#10]

  #<x_minus_probed> = #5061

  (Call sub "probe_x_plus_sub" to Probe x+ side of Workpiece)
  o<probe_x_plus_sub> call [#1][#3 + #11][#4][#8][#9][#10]

  #<x_plus_probed> = #5061

  (probed center calculation)
  #<probe_center> = [[#<x_plus_probed> + #<x_minus_probed>] / 2]

  (calculate X Width Probed)
  #<raw_width> = [#<x_plus_probed> - #<x_minus_probed>]

  (Completed probed width calculations)
  #<x_probed_width> = [#<raw_width> + #<probe_diameter_offset>]

  (Record X Zero in selected WCO)
  G10 L2 P#5220 X[#<probe_center> + #<workspace_x>]

  (Probe Completion Move to Z Clearance Plane, and X Zero)
  G0 X0.0000

  (Call sub "probe_y_plus" to Probe Y+ side of Workpiece)
  o<probe_y_plus> call [#1][#3 + #12 / 2][#4][#8][#9][#10]

  #<y_plus_probed> = #5062

  (Call sub "probe_y_minus_sub" to Probe Y- side of Workpiece)
  o<probe_y_minus_sub> call [#1][#3 + #12][#4][#8][#9][#10]

  #<y_minus_probed> = #5062

  (probed center calculation)
  #<probe_center> = [[#<y_plus_probed> - #<y_minus_probed>] / 2]

  (calculate Y Width Probed)
  #<raw_width> = [#<y_plus_probed> - #<y_minus_probed>]

  (Completed probed width calculations)
  #<y_probed_width> = [#<raw_width> + #<probe_diameter_offset>]

  (Record Y Zero in selected WCO)
  G10 L2 P#5220 y[#<probe_center> + #<workspace_y>]

  (Probe Completion Move to Z Clearance Plane, Y Zero)
  G90
  G0 Z[#<z_clearance>]
  G0 Y0.0000

o<probe_rect_pocket> endsub

M2 (end program)