;threading
o<threading> sub

  o<backup_status> call
  o<clear-axis-notif> call

#<X_coord>     = #1
#<feed_rpm>    = #2
#<tool_number> = #3
#<pitch>       = #4
#<Z_coord>     = #5
#<interior>    = #6
#<exterior>    = #7
#<coolant>     = #8

        O100 if [#<tool_number> 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

#<X_coord> = [#<X_coord> / 2.0]
#<starting_X> = [#<_x> * 2] (starting X)
#<starting_Z> = #<_z> (starting Z)
G96 D2000 S#<feed_rpm> ; Constant Surface Speed Mode
M4            ; Start Spindle
G4 P2         ; Wait to reach speed

        O110 if [#<coolant>]
                M8
        O110 endif

#<height> = [0.86603 * #<pitch>]
#<majorflat> = [#<height> * 0.125]
#<minorflat> = [#<height> * 0.250]
#<threaddepth> = [#<height> -0.06]
;(DEBUG,#<height> #<majorflat> #<minorflat> #<threaddepth>)

        O200 if [#<_metric>]
            #<cutdepth> = 0.2
            #<flatfeed> = 0.1
        O200 else
            #<cutdepth> = 0.007
            #<flatfeed> = 0.004
        O200 endif

;(DEBUG,test)
G95 F#<flatfeed> ; Feed-Per-Rev Mode
;(DEBUG,Test2)

;Threading
;(DEBUG,Test3)
        O300 if [#<interior> GT 0.5] ;internal
			;(DEBUG,interior)
            ;cut the minor flat diameter
            ;(DEBUG,INTERNAL Threading thread dia-#<X_coord> startZ-#<starting_Z> finishZ-#<Z_coord> Pitch-#<pitch> Tool-#<tool_number>)
            G0 Z #<starting_Z>
            G0 X [#<X_coord> + #<minorflat> - #<height>]
            G1 Z #<Z_coord>
            G0 X [#<X_coord> - #<height>]
            G0 Z #<starting_Z>
            G96 D600 S#<feed_rpm> ; limit RPM in threading mode
            G76 P#<pitch> Z#<Z_coord> i#<minorflat> j#<cutdepth> k#<threaddepth> H3 R1.5 Q29.5 E0 L0
            G0 X [#<X_coord> - 0.5]
        O300 else ;external
			;(DEBUG,Test2)
			;(DEBUG,TEST)
            ; cut the major diameter
            (DEBUG,EXTERNAL Threading thread dia-#<X_coord> startZ-#<starting_Z> finishZ-#<Z_coord> Pitch-#<pitch> Tool-#<tool_number> MF #<majorflat>)
            G0 Z #<starting_Z>
            G0 X [#<X_coord> +1]
            ;G1 X [#<X_coord> - #<majorflat>]
            ;G1 Z #<Z_coord>
            ;G0 X #<X_coord>
            G0 Z #<starting_Z>
            ;G96 D1000 S#<feed_rpm> ; limit RPM in threading mode
			G97 S1000
            G76 P#<pitch> Z#<Z_coord> i-1 j#<cutdepth> k#<threaddepth> H2 R1.5 Q29.5 E0 L0
            G0 X [#<X_coord> + 0.5]
        O300 endif
		;(DEBUG,Test4)

        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
%