HEIDENHAIN MANUALplus 4110 - Manual (Page 313)

HEIDENHAIN MANUALplus 4110 313
6.1
1
Cont
our
-Based T
u
rn
ing Cy
cles
Longitudinal contour roughing with recessing
G819
The cycle machines the contour area described by the current tool
position and the data defined in the subsequent blocks in a longitudinal
direction with recessing (see “Contour definition” on page 310).
Parameters
 X cutting limit (diameter value): The control machines up to the
cutting limit.
 P maximum infeed: The proportioning of cuts is calculated so that an
"abrasive cut" is avoided and the infeed distance is <= P.
 E plunge feed: The tool enters the material at the plunge feed E.
„ E=0: Descending contours are not machined.
„ No entry: The steeper the tool plunges into the material, the
greater the feed rate decrease (max. 50%).
 H type of departure (default: 1):
„ H=0: Machine contour outline after each pass.
„ H=1: Retract at 45°; machine contour outline after last pass.
„ H=2: Retract at 45°; do not machine contour outline.
 I oversize X (diameter value)—(default: 0)
 K oversize Z (default: 0)
Note on the execution of the cycle:
„ MANUALplus automatically determines the cutting and infeed
directions from the current tool position relative to the starting point
/ end point of the contour area.
„ Tool position at the end of the cycle: Cycle starting point
Example: G819
%819.nc
[G819]
N1 T3 G95 F0.25 G96 S200 M3
N2 G0 X120 Z2
N3 G819 P5 I1 K0.3
N4 G0 X80 Z2
N5 G1 Z-15 B-1
N6 G1 X102 B2
N7 G1 Z-22
N8 G1 X90 Zi-12 B1
N9 G1 Zi-6
N10 G1 X100 A80 B-1
N11 G1 Z-47
N12 G1 X120
N13 G80
END
„ The tool must be located outside the defined contour
area.
„ Cutting radius compensation: Active.
„ G57/G58 oversizes are taken into account if I/K is not
programmed. After the cycle has been executed, the
oversizes are canceled.
„ Safety clearance after each step: Parameter "Current
parameters—Machining—Safety distances."
Danger of collision!
If the tool angle and the tool point angle have not been
defined, the tool plunge-cuts at the plunging angle. If the
tool and point angles have been defined, the tool plunge-
cuts at the maximum possible plunging angle. In this
case, the resulting contour will not be completely finished
and may need to be reworked.