beautypg.com

6 sl cy cles – HEIDENHAIN iTNC 530 (340 49x-03) User Manual

Page 445

background image

HEIDENHAIN iTNC 530

445

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 on the slot wall. The
finishing allowance reduces the slot width by twice
the entered value.

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. Function inactive: Enter 0
(default setting)

Example: NC blocks

63 CYCL DEF 28 CYLINDER SURFACE

Q1=-8

;MILLING DEPTH

Q3=+0

;ALLOWANCE FOR SIDE

Q6=+0

;SET-UP CLEARANCE

Q10=+3

;PLUNGING 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