HEIDENHAIN SW 54843x-03 DIN Programming - Manual (Page 169)

HEIDENHAIN MANUALplus 620, CNC PILOT 640 169
3.1 Units—Dr
illing in the Y axis
"ICP tapping, Y axis" unit
The unit machines a single tap hole or a hole pattern in the XY or YZ
plane. Using ICP, you define the tap holes as well as further details.
Unit name: G73_ICP_Y / Cycle: G73 (see page 328)
Retraction length L: Use this parameter for floating tap holders. The
cycle calculates a new nominal pitch on the basis of the thread depth,
the programmed pitch, and the "retraction length." The nominal pitch
is somewhat smaller than the pitch of the tap. During tapping, the tap
is pulled away from the chuck by the retraction length. With this
method you can achieve higher service life from the taps.
Access to the technology database:
 Machining operation: Tapping
 Affected parameters: S
Parameters on the Pattern form
FK
see page 62
NS Starting block no. of contour
Parameters on the Cycle form
F1
Thread pitch
B Run-in length
L Retraction length when using floating tap holders (default: 0)
SR Retraction speed (default: Shaft speed for tapping)
SP Chip breaking depth
SI Retraction distance
RB Retraction plane
Further forms: see page 60