SINUMERIK THREADING CYCLE -97 ( SIMPLE EXTERNAL THREADING PROGRAM )

SINUMERIK THREADING CYCLE -97 ( SIMPLE EXTERNAL THREADING PROGRAM )

MAIN PROGRAM

HARSH.MPF

N01   G90  G71  G94  F50  ;

N02   G28  X0  Z0 ;

N03   M06  T02  D01 ;

N04   M03  S600 ;

N05   M07  ;

N06   G00  X30  Z1 ;

N07  CYCLE 97 [ 2 , 0 , 0, -20 ,20 , 20, 0 ,0 , 1.226 , 0.05 , 30 , 0 , 12 , 2 ,

3, 1 , _]

N08   G28 X0  Z0 ;

N09   M05 ;

N10   M09 ;

N11   M30 ;

DISCRIPTION OF PROGRAM

(Note : In these cycle there is no need of sub program )

MAIN  PROGRAM

HARSH .MPF – Main program name

N01-   Program in absolute co-ordinate system ,  all dimension in mm , feed in mm permin , feed rate 100 .

N02 -  Referance point command where tool at X0 Z0 .

N03 – Tool change command , select tool no 2 and offset diameter 01 .

N04 – Spindle onclockwise at speed 600 rpm.

N05 – Coolant ON .

N06 – Rapidcommand to near to the job and ready for machining .

N07 – For better understanding refer this link – THREADING CYCLE-97 DATA

          This  parameter value directly put into computer .Fig shows 20M X 2 , it means given is                      20mm major diameter and 2 pitch  

      PIT -    PIT means pitch of threads is 2 mm .

      MPIT -  It is also pitch of thread but it takes whenever if not given ,it is standards threads pitch                         from 3.5  to 60 . To produce metric cylindrical threads . But in these program we don’t                          need MPIT ,we take zero  .

      SPL –  Starting point of thread along  Z – axis , we take zero .

      FPL -  End point of thread along Z – axis , we take 20 .

      DM1 – Diameter of thread at starting point is 20 .

      DM2 – Diameter of thread at end point is also 20 .

      APP – How much tool away from when start operation , in these program no clearance is provide

                 hence we take zero .                 

      ROP -  After threading  ideal run path for Z axis , we take zero .

      TDEP – Thread depth , there is calculation  0.6134 x pitch ,

                        0.6134 X 2 = 1.226

      FAL – Finishing allowance for finish cut , we take 0.05 .

      IANG – Thread angle , if angle is 60 we take always half of the angle 30.

      NSP – Used for offset at starting  1⁰  , 2⁰  , but we never take offset in these program hence we                        used 0 .   

      NRC – No. of rough cut , its deapends on depth of cut . We take 12 .

      NID – Finishing cut at last . we take 2 .

      VARY – In computer panel there is four option for thread , generally we select for external                               thread No. 3.

      NUMTH – No of thread cut this is depend upon single start and multi-start . We take 1 .

      VRT   ___ (skip it )

                                         

N08 -  Referance point command where tool at X0 Z0 .

N09 – Coolant  OFF .

N10 – Mainprogram end .