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HEIDENHAIN iTNC 530 (340 49x-04) User Manual

Page 404

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404

8 Programming: Cycles

8.5 Cy

cles f

o

r Dr

illing, T

a

pping and Thr

ead Milling

Set-up clearance

Q200 (incremental value): Distance

between tool tip and workpiece surface.

Depth at front

Q358 (incremental value): Distance

between tool tip and the top surface of the workpiece
for countersinking at the front of the tool.

Countersinking offset at front

Q359 (incremental

value): Distance by which the TNC moves the tool
center away from the stud center.

Workpiece surface coordinate

Q203 (absolute

value): Coordinate of the workpiece surface.

2nd set-up clearance

Q204 (incremental value):

Coordinate in the tool axis at which no collision
between tool and workpiece (clamping devices) can
occur.

Feed rate for countersinking

Q254: Traversing

speed of the tool during countersinking in mm/min.

Feed rate for milling

Q207: Traversing speed of the

tool in mm/min while milling.

Example: NC blocks

25 CYCL DEF 267 OUTSIDE THREAD MLLNG

Q335=10

;NOMINAL DIAMETER

Q239=+1.5

;PITCH

Q201=-20

;DEPTH OF THREAD

Q355=0

;THREADS PER STEP

Q253=750

;F PRE-POSITIONING

Q351=+1

;CLIMB OR UP-CUT

Q200=2

;SET-UP CLEARANCE

Q358=+0

;DEPTH AT FRONT

Q359=+0

;OFFSET AT FRONT

Q203=+30

;SURFACE COORDINATE

Q204=50

;2ND SET-UP CLEARANCE

Q254=150

;F COUNTERSINKING

Q207=500

;FEED RATE FOR MILLNG