beautypg.com

8 sl c y cles – HEIDENHAIN iTNC 530 (340 49x-04) User Manual

Page 470

background image

470

8 Programming: Cycles

8.8 SL c

y

cles

Milling depth

Q1 (incremental value): Distance

between the cylindrical surface and the floor of the
contour.

Finishing allowance for side

Q3 (incremental

value): Finishing allowance on the ridge wall. The
finishing allowance increases the ridge width by
twice the entered value.

Set-up clearance

Q6 (incremental value): Distance

between the tool tip and the cylinder surface.

Plunging depth

Q10 (incremental value): Dimension

by which the tool plunges in each infeed.

Feed rate for plunging

Q11: Traversing speed of the

tool in the tool axis.

Feed rate for milling

Q12: Traversing speed of the

tool in the working plane.

Cylinder radius

Q16: Radius of the cylinder on which

the contour is to be machined.

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).

Ridge width

Q20: Width of the ridge to be machined.

Before programming, note the following

In the first NC block of the contour program, always
program both cylinder surface coordinates.

Ensure that the tool has enough space laterally for contour
approach and departure.

The memory capacity for programming an SL cycle is
limited. You can program up to 8192 contour elements in
one SL cycle.

The algebraic sign for the cycle parameter DEPTH
determines the working direction. If you program
DEPTH = 0, the cycle will not be executed.

The cylinder must be set up centered on the rotary table.

The tool axis must be perpendicular to the rotary table. If
this is not the case, the TNC will generate an error
message.

This cycle can also be used in a tilted working plane.

The TNC checks whether the compensated and non-
compensated tool paths lie within the display range of the
rotary axis, which is defined in MP810.x. If the error
message “Contour programming error” is output, set
MP810.x = 0.

Example: NC blocks

63 CYCL DEF 29 CYLINDER SURFACE RIDGE

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

;TYPE OF DIMENSION

Q20=12

;RIDGE WIDTH