beautypg.com

HEIDENHAIN TNC 320 (340 551-02) User Manual

Page 299

background image

HEIDENHAIN TNC 320

299

8.6 Cy

cles f

o

r Multipass Milling

8

Set-up clearance

Q200 (incremental value): Distance

between tool tip and the starting position in the tool
axis. If you are milling with machining strategy
Q389=2, the TNC moves the tool at the set-up
clearance over the current plunging depth to the
starting point of the next pass.

8

Clearance to side

Q357 (incremental value): Safety

clearance to the side of the workpiece when the tool
approaches the first plunging depth, and distance at
which the stepover occurs if the machining strategy
Q389=0 or Q389=2 is used.

8

2nd set-up clearance

Q204 (incremental value):

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

Example: NC blocks

71 CYCL DEF 232 FACE MILLING

Q389=2

;STRATEGY

Q225=+10 ;STARTING PNT 1ST AXIS

Q226=+12 ;STARTING PNT 2ND AXIS

Q227=+2.5 ;STARTING PNT 3RD AXIS

Q386=-3

;END POINT IN 3RD AXIS

Q218=150 ;FIRST SIDE LENGTH

Q219=75

;SECOND SIDE LENGTH

Q202=2

;MAX. PLUNGING DEPTH

Q369=0.5 ;ALLOWANCE FOR FLOOR

Q370=1

;MAX. OVERLAP

Q207=500 ;FEED RATE FOR MILLNG

Q385=800 ;FEED RATE FOR FINISHING

Q253=2000 ;F PRE-POSITIONING

Q200=2

;SET-UP CLEARANCE

Q357=2

;CLEARANCE TO SIDE

Q204=2

;2ND SET-UP CLEARANCE