;tapping
o<tapping> sub

;  o<backup_status> call

#<tapping_diam>     = #1
#<tapping_z>        = #2
#<tapping_ss>       = #3
#<tapping_pitch>    = #4
#<tapping_tool>     = #5
#<tapping_coolant>  = #6
#<tapping_rampdistance>   = #7

#<starting_Z> = #<_z> (starting Z)

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

G7  ; diameter mode
G17 ; XY Plane
G21 ; Metric Units
G90 ; Absolute Distance
G91.1 ; but not for arcs

#<speed_calc> = [[1000 * #<tapping_ss>] / [3.1415 * #<tapping_diam>]] ; metric mode RPM

G97 S#<speed_calc> ; Constant RPM mode
G97 S500
M3                 ; Start Spindle
G4 P1              ; Wait to reach speed

        o110 if [#<tapping_coolant>]
                M8
        o110 endif

(DEBUG,Tapping dia-#<tapping_diam> depth-#<tapping_z> asked-speed-#<tapping_speed> pitch-#<tapping_pitch> tool-#<tool_number> calculated-rpm-#<speed_calc> start-Z-#<starting_Z>)

#<new_z> = [#<tapping_z> + #<tapping_rampdistance>] ; taking care of spindle ramp distance 

G98
G0 X0 ; must drill from the centerline.  Tool should be zeroed here
G33.1 Z#<new_z> K#<tapping_pitch>
G80

M5
M9

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


o<tapping> endsub

M2
%