HEIDENHAIN CNC PILOT 640 User Manual page 128

2
Cycle form:
X1: Start point drill (diameter value)
X2: End point drill
F1: Thread pitch
B: Run-in lgth, to achieve the programmed speed and feed rate
(default: 2 * Thread pitch F1)
L: Retract length with use of floating tap holders (default: 0)
SR: Return speed (default: tapping speed)
SP: Chip breaking depth
SI: Retraction distance
RB: Return plane
Further forms:
Further information:
Use the Retract 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 the taps.
Access to the technology database:
Machining operation: Tapping
Affected parameter: S
128
"smart.Turn unit", Page 78
smart.Turn units | Units – Drilling in C axis
HEIDENHAIN | User's Manual smart.Turn and DIN Programming | 12/2017