HEIDENHAIN CNC Pilot 4290 - Manual (Page 147)

HEIDENHAIN CNC PILOT 4290 135
Simple face roughing G82
G82 machines (roughs) the contour area defined by the current tool
position and ”X, Z.” If you wish to machine an oblique cut, you can
define the angle with I and K.
The CNC PILOT uses the position of the target point to distinguish
between external and internal machining.
The proportioning of cuts is calculated so that an ”abrasive cut” is
avoided and the calculated infeed distance <= maximum infeed K.
Oversizes:
■ G57 oversizes
■ are calculated with algebraic sign (oversizes are therefore
impossible for inside contour machining)
■ stay in effect after cycle end
■ G58 oversizes: are not taken into account
Cycle run
1 Calculate the cut segmentation (infeeds).
2 Approach workpiece for first pass from starting point on paraxial
path.
3 Move at feed rate to target point X.
4 Depending on algebraic sign of K:
■ K<0: Machine contour outline.
■ K>0: Retract by 1 mm at 45°.
5 Return at rapid traverse and approach for next pass.
6 Repeat 3 to 5 until target point Z has been reached.
7 Move to:
■ X – starting point of cycle.
■ Z – last position at which the tool retracts.
Parameters
X/Z: Contour target point (X diameter)
I: Offset in X direction – default: 0
K: Maximum infeed distance
■ K<0: With machining contour outline.
■ K>0: Without machining contour outline.
Q: G function Infeed – default: 0
■ 0: Infeed with G0 (rapid traverse).
■ 1: Infeed with G1 (feed rate).
■ Programming X, Z: absolute,
incremental or modal
■ Tool radius compensation: Not active
■ Safety clearance After every step: 1 mm.
4.7 T
u
rning Cy
cles