[CARMEX]

Hey guys I have a CNC program I am running with a larger threadmill ( shellmill)

I have made many threads with the tool and the program

The problem is once inspected by the customer they want to change the entry point of the thread

The have a print that requires a specific entry point as to where the thread first starts or enters the material at part face or thread entry ( as in positions of a hand on a clock" )

As of right now the program I made starts or enters at the 12 o clock position, we need to shift that entry point 90 degrees to the left so they need to start the thread in the quadrant to the left of the quadrant we are in

Normally I would just start the thread ( initial Z at a lower or higher point to accommodate, but they are threading to a flat bottom and require threads all the way) I would have them move up or down 1/4 of a pitch to move 1 quadrant, but we cant on this one.

If I post the program ( G code, can anybody assist or point me in the correct direction?

My software is generic used of the mfg of the tools website.

can this be done by hand simply by shifting all the number to the next quadrant back? Ive never done that

[txcncman]

If your machine has the option, you can use coordinate rotation.

[CARMEX]

If your machine has the option, you can use coordinate rotation.

I will check!!

[CARMEX]

If your machine has the option, you can use coordinate rotation.

dont have it

[CARMEX]

%
O0103
( FANUC I&J, RH, CLIMB, INTERNAL THREAD MILLING )
( CARMEX, TOOL - SR248H63 - 9, INSERT - H63 I 3 BUT )
( THREAD - 3 TPI, DIAMETER 7.5 INCH, DEPTH 3 INCH )
( TOOL RADIUS COMPENSATION D27=0 )

G90 G00 G54 G40 G17 G94 X0.0000 Y0.0000 S600 M03
G43 D27 Z1.9685 M08
( PASS NUMBER - 1 )
G90 G01 Z-3.0313 F196.9
G91
G41 D27 X1.1800 Y-1.1800 Z0.0000 F11.0
G03 X1.1800 Y1.1800 Z0.0416 I0.0000 J1.1800 F7.0
G03 X0.0000 Y0.0000 Z0.3333 I-2.3600 J0.0000
G03 X-1.1800 Y1.1800 Z0.0416 I-1.1800 J0.0000
G01 G40 X-1.1800 Y-1.1800 Z0.0000 F196.9
G01 Z.5833
G41 D27 X1.1800 Y-1.1800 Z0.0000 F11.0
G03 X1.1800 Y1.1800 Z0.0416 I0.0000 J1.1800 F7.0
G03 X0.0000 Y0.0000 Z0.3333 I-2.3600 J0.0000
G03 X-1.1800 Y1.1800 Z0.0416 I-1.1800 J0.0000
G01 G40 X-1.1800 Y-1.1800 Z0.0000 F196.9
G01 Z.5833
G41 D27 X1.1800 Y-1.1800 Z0.0000 F11.0
G03 X1.1800 Y1.1800 Z0.0416 I0.0000 J1.1800 F7.0
G03 X0.0000 Y0.0000 Z0.3333 I-2.3600 J0.0000
G03 X-1.1800 Y1.1800 Z0.0416 I-1.1800 J0.0000
G01 G40 X-1.1800 Y-1.1800 Z0.0000 F196.9
( PASS NUMBER - 2 )
G90 G01 Z-3.0313 F196.9
G91
G41 D27 X1.2335 Y-1.2335 Z0.0000 F11.0
G03 X1.2335 Y1.2335 Z0.0416 I0.0000 J1.2335 F7.0
G03 X0.0000 Y0.0000 Z0.3333 I-2.4670 J0.0000
G03 X-1.2335 Y1.2335 Z0.0416 I-1.2335 J0.0000
G01 G40 X-1.2335 Y-1.2335 Z0.0000 F196.9
G01 Z.5833
G41 D27 X1.2335 Y-1.2335 Z0.0000 F11.0
G03 X1.2335 Y1.2335 Z0.0416 I0.0000 J1.2335 F7.0
G03 X0.0000 Y0.0000 Z0.3333 I-2.4670 J0.0000
G03 X-1.2335 Y1.2335 Z0.0416 I-1.2335 J0.0000
G01 G40 X-1.2335 Y-1.2335 Z0.0000 F196.9
G01 Z.5833
G41 D27 X1.2335 Y-1.2335 Z0.0000 F11.0
G03 X1.2335 Y1.2335 Z0.0416 I0.0000 J1.2335 F7.0
G03 X0.0000 Y0.0000 Z0.3333 I-2.4670 J0.0000
G03 X-1.2335 Y1.2335 Z0.0416 I-1.2335 J0.0000
G01 G40 X-1.2335 Y-1.2335 Z0.0000 F196.9
( PASS NUMBER - 3 )
G90 G01 Z-3.0313 F196.9
G91
G41 D27 X1.2550 Y-1.2550 Z0.0000 F12.0
G03 X1.2550 Y1.2550 Z0.0416 I0.0000 J1.2550 F8.0
G03 X0.0000 Y0.0000 Z0.3333 I-2.5100 J0.0000
G03 X-1.2550 Y1.2550 Z0.0416 I-1.2550 J0.0000
G01 G40 X-1.2550 Y-1.2550 Z0.0000 F196.9
G01 Z.5833
G41 D27 X1.2550 Y-1.2550 Z0.0000 F12.0
G03 X1.2550 Y1.2550 Z0.0416 I0.0000 J1.2550 F8.0
G03 X0.0000 Y0.0000 Z0.3333 I-2.5100 J0.0000
G03 X-1.2550 Y1.2550 Z0.0416 I-1.2550 J0.0000
G01 G40 X-1.2550 Y-1.2550 Z0.0000 F196.9
G01 Z.5833
G41 D27 X1.2550 Y-1.2550 Z0.0000 F12.0
G03 X1.2550 Y1.2550 Z0.0416 I0.0000 J1.2550 F8.0
G03 X0.0000 Y0.0000 Z0.3333 I-2.5100 J0.0000
G03 X-1.2550 Y1.2550 Z0.0416 I-1.2550 J0.0000
G01 G40 X-1.2550 Y-1.2550 Z0.0000 F196.9
G90 G00 Z1.9685
M99
%

[txcncman]

Change to match this pattern to rotate start and end points 90 degrees:

G41 D27 X1.1800 Y1.1800 Z0.0000 F11.0
G03 X-1.1800 Y1.1800 Z0.0416 I-1.1800 J0.000 F7.0
G03 X0.0000 Y0.0000 Z0.3333 I0.0000 J-2.3600
G03 X-1.1800 Y-1.1800 Z0.0416 I0.000 J-1.1800
G01 G40 X1.1800 Y-1.1800 Z0.0000 F196.9

[CARMEX]

You are awesome txcncman!!!!