6 sl cy cles – HEIDENHAIN iTNC 530 (340 49x-02) ISO programming User Manual
Page 382
382
8 Programming: Cycles
8.6 SL Cy
cles
8
Milling depth
Q1 (incremental value): Distance
between the cylindrical surface and the floor of the
contour.
8
Finishing allowance for side
Q3 (incremental
value): Finishing allowance in the plane of the unrolled
cylindrical surface. This allowance is effective in the
direction of the radius compensation.
8
Set-up clearance
Q6 (incremental value): Distance
between the tool tip and the cylinder surface.
8
Plunging depth
Q10 (incremental value): Dimension
by which the tool plunges in each infeed.
8
Feed rate for plunging
Q11: Traversing speed of the
tool in the tool axis.
8
Feed rate for milling
Q12: Traversing speed of the
tool in the working plane.
8
Cylinder radius
Q16: Radius of the cylinder on which
the contour is to be machined.
8
Dimension type ? ang./lin.
Q17: The dimensions for
the rotary axis of the subprogram are given either in
degrees (0) or in mm/inches (1).
8
Slot width
Q20: Width of the slot to be machined.
8
Tolerance?
Q21: If you use a tool smaller than the
programmed slot width Q20, process-related
distortion occurs on the slot wall wherever the slot
follows the path of an arc or oblique line. If you define
the tolerance Q21, the TNC adds a subsequent
milling operation to ensure that the slot dimensions
are a close as possible to those of a slot that has been
milled with a tool exactly as wide as the slot. With
Q21 you define the permitted deviation from this
ideal slot. The number of subsequent milling
operations depends on the cylinder radius, the tool
used, and the slot depth. The smaller the tolerance is
defined, the more exact the slot is and the longer the
remachining takes.
Recommendation: Use a tolerance of 0.02 mm.
0: Function inactive
Example: NC block
N63 G128 CYLINDER SURFACE
Q1=-8
;MILLING DEPTH
Q3=+0
;ALLOWANCE FOR SIDE
Q6=+0
;SET-UP CLEARANCE
Q10=+3
;INFEED DEPTH
Q11=100
;FEED RATE FOR PLUNGING
Q12=350
;FEED RATE FOR MILLING
Q16=25
;RADIUS
Q17=0
;DIMENSION TYPE
Q20=12
;SLOT WIDTH
Q21=0
;TOLERANCE