7 t u rning cy cles – HEIDENHAIN CNC Pilot 4290 User Manual
Page 137
HEIDENHAIN CNC PILOT 4290
125
4.7 T
u
rning Cy
cles
D
G22
G23
G23
G25
G25
G25
=
H0
H1
H4
H5/6
H7..9
0
•
•
•
•
•
•
1
•
•
•
–
–
–
2
•
•
–
•
•
•
3
•
•
–
–
–
–
4
•
•
–
•
•
–
”•”: Skip elements
■
V=3: No machining
■
V=4: Chamfer/rounding is being machined—
not the basic element (prerequisite: Contour
section with an element)
D:
Omit element (influences the machining of
undercuts, relief turns: see table)—default: 0
B:
Slide lead for 4-axis machining
■
B=0: Both slides work on the same
diameter—with double feed rate
■
B<>0: Distance to “leading” slide (the lead).
The slides work on different diameters with
the same feed rate.
■
B<0: The slide with larger number leads.
■
B>0: The slide with smaller number leads.
4 axis operation
■
When working on the same diameter, both slides
start simultaneously.
■
When working on different diameters, the second
slide starts when the leading slide has reached
”lead B.” This is synchronized at every step. Each
slide advances by the calculated depth of cut.
If the slides do not have to execute the same
number of cuts, the leading slide executes the
last cut.
With ”constant cutting speed,” the cutting speed
depends on the speed of the leading slide. The
leading tool does not retract until the subsequent
tool is ready for use.
On 4 axis cycles, ensure that the tools are identical (tool
type, cutting edge radius, cutting edge angle, etc.).