HEIDENHAIN TNC 320 (340 551-01) - Manual (Page 278)

278 8 Programming: Cycles
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 MILLING
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