[Hydn]

We normaly cut tapered thread with this G92 cycle
On our new puma 400LM with Fanuc 32i he cuts straight.
has it to do with a parametersetting?

Please help!!

N4M98P1(THREAD)
G97S450M3T303
G0X90.Z25.4M8
M24
G92X74.996Z-70.I-3.051F3.175
X74.601
X74.206
X73.811
X73.416
X73.316
G0Z25.M9
M98P1
M1

[dcoupar]

I don't see a parameter to change the address. Try R instead of I.

[sinha_nsit]

And, it is a radius value.

[sinha_nsit]

There is no reason why it should not.

[harshal]

CNC G92 threading cycle for fanuc program - CNC PROGRAMMING TUTORIAL
O1571
N10 M06 T02 02 ;
N20 G50 S1500 ;
N30 M03 G97 S200 ;
N40 M08 ;
N50 G00 X50 Z2 ;
N60 G92 X49.07 Z-20 F1.5 ;
N70 X48.77
N80 X48.47
N90 X48.17
N100 G28 U0 W0 ;
N110 M05 M09 M30 ;
More examples..........!!!!
DESCRIPTION OF MAIN PROGRAM :-
Calculation :- Depth of thread = 0.6134 X Pitch
= 0.9201
Threading start major dia = major dia - 0.9201
= 49.07 ( Crest)
Minor diameter = Major dia - 2 x Depth of thread
= 50 - 2 x 0.9201
= 48.16 (root)
Each cut is 150 microns =0.15mm , it means total reduce 0.30 mm and cutting upto root 48.16 mm
First cut is 49.07 mm (Crest)
Second cut is 49.07-0.3 = 48.77
Third cut is 48.77-0.3 = 48.47
Final cut is 48.47 -0.3 = 48.17 (~ 48.16)(root)
************************************************** *******************************
01571 - Name of main program
N10- Tool change command , select tool no 2
N20- Maximum spindle speed command , speed is 1500 rpm
N30- Spindle ON clockwise , constant spindle speed , speed is 200 rpm
N40- Coolant ON
N50- Rapid action command , where X50 and Z2 .
N60- Threading cycle command , where X49.07( crest )(First cut) and Z-20 , feed rate is 1.5 ( it is always is equal to pitch )
N70- Second cut is 48.77 in X axis
N80- Third cut is 48.47 in X axis
N90 - Final cut is 48.17 in X axis (root)
N100 - Reference position command , where X0 and Z0 ;
N110 - Spindle OFF , coolant OFF , main prog. end

for more info --------------********************* CNC PROGRAMMING TUTORIAL