;threading
o<threading> sub

  o<backup_status> call

#<threading_ss> = #1
#<threading_maxrpm>= #2
#<threading_feed>= #3
#<threading_doc>= #4
#<threading_tool>= #5
#<threading_coolant>= #6
#<threading_x>= #9
#<threading_z>= #10
#<threading_pitch>= #11
#<threading_id>= #12


#<surface_speed> = #<threading_ss>
#<cut_size>      = #<threading_doc>


        o100 if [#<threading_tool> NE #<_current_tool>]
             (MSG,ERROR : Set tool before use macro)
        o100 return [-2] ; indicate failure to epilog
        o100 endif

G8  ; Lathe radius Mode
G18 ; XZ Plane
G90 ; Absolute Distance

#<threading_x> = [#<threading_x> / 2.0]
#<starting_X> = [#<_x> * 2] (starting X)
#<starting_Z> = #<_z> (starting Z)
G96 D#<threading_maxrpm> S#<threading_feed> ; Constant Surface Speed Mode
M3            ; Start Spindle
G4 P1         ; Wait to reach speed

        o110 if [#<threading_coolant>]
                M8
        o110 endif

#<height> = [0.86603 * #<threading_pitch>]
#<majorflat> = [#<height> * 0.125]
#<minorflat> = [#<height> * 0.250]
#<threaddepth> = [#<height> * 0.625]
;(DEBUG,#<height> #<majorflat> #<minorflat> #<threaddepth>)

        o200 if [#<_metric>]
            #<cutdepth> = 0.2
            #<flatfeed> = 0.1
        o200 else
            #<cutdepth> = 0.007
            #<flatfeed> = 0.004
        o200 endif

G95 F#<flatfeed> ; Feed-Per-Rev Mode

;Threading
        o300 if [#<threading_id>GT 0.5] ;internal
            ;cut the minor flat diameter
            ;(DEBUG,INTERNAL Threading thread dia-#<threading_x> startZ-#<starting_Z> finishZ-#<threading_z> Pitch-#<threading_pitch> Tool-#<tool_number>)
            G0 Z #<starting_Z>
            G0 X [#<threading_x> + #<minorflat> - #<height>]
            G1 Z #<threading_z>
            G0 X [#<threading_x> - #<height>]
            G0 Z #<starting_Z>
            G96 D#<threading_maxrpm> S#<threading_feed> ; limit RPM in threading mode
            G76 P#<threading_pitch> Z#<threading_z> i#<minorflat> j#<cutdepth> k#<threaddepth> H3 R1.5 Q29.5 E0 L0
            G0 X [#<threading_x> - 0.5]
        o300 else ;external
            ; cut the major diameter
            ;(DEBUG,EXTERNAL Threading thread dia-#<threading_x> startZ-#<starting_Z> finishZ-#<threading_z> Pitch-#<threading_pitch> Tool-#<tool_number> MF #<majorflat>)
            G0 Z #<starting_Z>
            G0 X #<threading_x>
            G1 X [#<threading_x> - #<majorflat>]
            G1 Z #<threading_z>
            G0 X #<threading_x>
            G0 Z #<starting_Z>
            G96 D#<threading_maxrpm> S#<threading_feed> ; limit RPM in threading mode
            G76 P#<threading_pitch> Z#<threading_z> i[-#<majorflat>] j#<cutdepth> k#<threaddepth> H3 R1.5 Q29.5 E0 L0
            G0 X [#<threading_x> + 0.5]
        o300 endif

        G0 Z#<starting_Z>

M5
M9

  o<backup_restore> call     ; restore g20/21, g90/g91, feedrate cuter-comp and other using now global _backup_var

o<threading> endsub

M2
%