smart.Turn units | Units – Drilling in C axis
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HEIDENHAIN | User's Manual smart.Turn and DIN Programming | 12/2017
Circular tapping pattern, face unit
This unit machines a circular tapping pattern on the face of the
workpiece.
Unit name: G73_Cir_Stirn_C / cycle: G73
Further information: "Tapping G73", Page 376
Pattern form:
Q: Number of holes
XM, CM: Polar center point
XK, YK: Cartesian center point
A: Start angle
Wi: End angle – Angle increment
K: Pattern diameter
W: Final angle
VD: Rotation dir. (default: 0)
VD = 0, without W: Figures are arranged on a full circle
VD = 0, with W: Figures are arranged on the longer circular
arc
VD = 0, with Wi: The algebraic sign of Wi defines the
direction (Wi < 0: clockwise)
VD = 1, with W: clockwise
VD = 1, with Wi: Clockwise (algebraic sign of Wi has no
effect)
VD = 2, with W: Counterclockwise
VD = 2, with Wi: Counterclockwise (algebraic sign of Wi has
no effect)
Cycle form:
Z1: Start point drill
Z2: 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 (default: back to start position)
Further forms:
Further information: "smart.Turn unit", Page 78
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
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