smart.Turn units | Units – Drilling in C axis
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HEIDENHAIN | User's Manual smart.Turn and DIN Programming | 12/2017
Circular pattern drilling, face unit
This unit machines a circular drilling pattern on the face of the
workpiece.
Unit name: G74_Bohr_Stirn_C / cycle: G74
Further information: "Deep boring G74", Page 378
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
E: Period of dwell at end of hole (default: 0)
D: Retraction type
0: Rapid traverse
1: Feed rate
V: Feed reduction
0: Without reduction
1: At end of the hole
2: At start of the hole
3: At start & end of hole
AB: Drilling lengths (default: 0)
P: 1. Boring depth
IB: Hole depth reduct. val – value by which the hole depth
decreases after every infeed.
JB: Minimum hole depth
If you have entered a hole depth reduction value, the hole depth
is reduced only to the value entered in JB.
B: Return distance – value by which the tool is retracted after
reaching the respective hole depth
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