HEIDENHAIN SW 54843x-03 DIN Programming - Manual (Page 99)

HEIDENHAIN MANUALplus 620, CNC PILOT 640 99
2.5 Units—Dr
illing in C axis
"Tap hole, lateral surface" unit
This unit machines a tap hole on the lateral surface of the workpiece.
Unit name: G73_Gew_Mant_C / Cycle: G73 (see page 328)
Use the retraction length 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 taps.
Access to the technology database:
 Machining operation: Tapping
 Affected parameters: S
Cycle form
X1
Start point drill (starting point of hole; diameter value)
X2 End point drill (end point of hole; diameter value)
CS Spindle angle
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
Further forms: see page 60