SIEMENS Sinumerik LONGHOLE cnc program

                              Sinumerik LONGHOLE cycle is used to machining long hole located on a circle. The long hole longitudinal axis is aligned radially.

LONGHOLE ( RTP , RFP , SIDS , DP , DPR , NUM , LENG , CPA , CPO , RAD , STA1                                       , INDA , FFD , FFP1 , MID )

Where RTP = Retraction plane 

            RFP = Reference plane 

            SIDS = Safety clearance

            DP =  Final drilling depth 

            DPR = Final drilling depth relative to reference plane 

            NUM = Numbers of hole 

            LENG = Length of long hole

            CPA = Center point of circle , abscissa (x-axis)

            CPO = Center point of circle , ordinate (y-axis)

            RAD= Radius of circle 

            STA1= Starting angle

            INDA= Increamenting angle

            FFD = Feed rate for depth infeed

            FFP1 = Feed rate for surface machining

            MID = Maximum infeed depth for an infeed

EXAMPLE : Drill the 6 long holes with length 20 and depth of a hole is also 20 

HARSH.MPF

N10  G90 G71 M06  T03 D01 ;

N20  M03 S1000 M08 ;

N30  G17 G00 X50 Y50 Z50 ;

N40  LONGHOLE ( 10 , 0 , 5 , _ , 20 , 8 , 20 , 50 ,50 , 25 , 45 , 45 ,100 , 320 ,6 )

N50  G00 Z50 ;

N60  M05 M09 M30 ;

DESCRIPTION

HARSH.MPF- Name of the main program

N10 -  Absolute coordinate system, a metric input command, Tool change command select tool no  3 .

N20- Spindle On clockwise at the speed 1000 rpm & coolant is on 

N30-  Internal threading at XY- plane, rapid traverse command where tool takes a position at reference point where X50 , Y50 & Z50 .

N40 - call LONGHOLE ( RTP= 10 , RFP= 0 , SIDS= 5 , DP= _ , DPR= 20 , NUM= 8 , LENG= 20 , CPA= 50 , CPO= 50 , RAD= 25 , STA1= 45, INDA= 45 , FFD= 100 , FFP1= 320 , MID= 6 )

N50 - Tool goes rapidly up position .

N60- Spindle stop , coolant off , main prog. end 

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