Siemens SINUMERIK 828D Programming Manual page 269

Example
Program code
N1608 M3 S10
N1609 G0 G64 Z40 X216
N1610 G33 Z0 K100 SF=R14
N1611 G35 Z-200 K100 F17.045455
N1612 G33 Z-240 K50
N1613 G0 X218
N1614 G0 Z40
N1615 M17
References
Function Manual, Basic Functions; Feedrates (V1), Section "Linear increasing/decreasing
thread lead change with G34 and G35"
Fundamentals
Programming Manual, 07/2010, 6FC5398-1BP40-0BA0
9.11 Thread cutting with increasing or decreasing lead (G34, G35)
Comment
; Spindle on.
; Approach starting point.
; Thread cutting with constant lead
; Lead decrease: 17.0454 mm/rev2
; Traverse thread block without jerk.
(100 mm/rev)
Lead at end of block: 50mm/rev
Motion commands
269