Friends , G76 and G78(G code system B) are similar threading cycle in fanuc contol cnc . Sometimes some fanuc control cnc model working with G78 Cycle . Mostly used for threading cycle is G76 , behaves same as G78 threading cycle. Manin program will be same , change is only is place of G76 .
N10 M06 T01 01 ;
N20 M04 G97 S1000 ;
N30 G00 X45 Z5 ;
N40 G78 P020060 Q100 R50 ;
N50 G78 X38.7 Z-50 P1227 Q100 F2 ;
N60 G00 X45 Z5 ;
N70 M05 M09 M30 ;
DESCRIPTION OF MAIN PROGRAM :-
N10- Tool change command , select tool no. 1
N20- Spindle ON anti clockwise , constant spindle speed command , speed is 1000 rpm
N30- Rapid action command where X45 and Z5 .
N40- Threading cycle command , P020060
( P02 = No. of finished path
00 = Chamfer amount at end
60 = Angle of tool tip ) ,
Q100 = Each cut is 0.1 mm ,
R20 = finishing allowance 0.02mm
N50- Threading cycle command , Minor dia X axis , threading along Z- axis up to -50 , Threading depth , Depth of finish cut 0.1 mm , pitch is 2 .
N60- Rapid action command where X45 and Z5 .
N70- Spindle off , coolant off , main program end .
More examples..........!!!!
N10 M06 T01 01 ;
N20 M04 G97 S1000 ;
N30 G00 X45 Z5 ;
N40 G78 P020060 Q100 R50 ;
N50 G78 X38.7 Z-50 P1227 Q100 F2 ;
N60 G00 X45 Z5 ;
N70 M05 M09 M30 ;
DESCRIPTION OF MAIN PROGRAM :-
N10- Tool change command , select tool no. 1
N20- Spindle ON anti clockwise , constant spindle speed command , speed is 1000 rpm
N30- Rapid action command where X45 and Z5 .
N40- Threading cycle command , P020060
( P02 = No. of finished path
00 = Chamfer amount at end
60 = Angle of tool tip ) ,
Q100 = Each cut is 0.1 mm ,
R20 = finishing allowance 0.02mm
N50- Threading cycle command , Minor dia X axis , threading along Z- axis up to -50 , Threading depth , Depth of finish cut 0.1 mm , pitch is 2 .
: M40X2
Major diameter is 40
Pitch is 2
N60- Rapid action command where X45 and Z5 .
N70- Spindle off , coolant off , main program end .
More examples..........!!!!
G78 FANUC THREADING CYCLE PROGRAM FOR LATHE CNC EXAMPLE
Reviewed by harshal
on
July 25, 2018
Rating:
