Example: Milling A Contour In Several Infeeds - HEIDENHAIN TNC 426 B User Manual

Example: Milling a contour in several infeeds

Example: Milling a contour in several infeeds
Program sequence
Pre-position the tool to the workpiece surface
Enter the infeed depth in incremental values
Mill the contour
Repeat downfeed and contour-milling
BEGIN PGM PGMWDH MM
1 BLK FORM .1 Z X+ Y+
2 BLK FORM .2 X+1 Y+1
3 TOOL DEF 1 L+ R+1
4 TOOL CALL 1 Z S5
5 L Z+25 R F MAX
6 L X-2 Y+3 R F MAX
7 L Z+ R F MAX M3
8 LBL 1
9 L IZ-4 R F MAX
1 APPR CT X+2 Y+3 CCA9
11 FC DR- R18 CLSD+ CCX+2
12 FLT
13 FCT DR- R15 CCX+5
14 FLT
15 FCT DR- R15 CCX+75 CCY+2
16 FLT
17 FCT DR- R18 CLSD- CCX+2
18 DEP CT CCA9 R+5 F1
19 L X-2 Y+ R F MAX
2 CALL LBL 1 REP 4/4
21 L Z+25 R F MAX M2
22 END PGM PGMWDH MM
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Z-4
Z+
Define the tool
Call the tool
Retract the tool
Pre-position in the working plane
Pre-position to the workpiece surface
Set label for program section repeat
Infeed depth in incremental values (in the open)
R+5 RL F25
Approach contour
CCY+3
Contour
CCY+75
CCY+3
Depart contour
Retract tool
Return jump to LBL 1; section is repeated a total of 4 times
Retract in the tool axis, end program
Y
100
75
30
20
20 50
9 Programming: Subprograms and Program Section Repeats
X
75 100