HEIDENHAIN TNC 620 User Manual page 247

FACE MILLING (Cycle 233, DIN/ISO: G233, software option 19) 10.5
Starting point in 3rd axis Q227 (absolute):
Coordinate of the workpiece surface used to
calculate the infeeds. Input range -99999.9999 to
99999.9999
End point in 3rd axis Q386 (absolute): Coordinate
in the spindle axis to which the surface is to be face
milled. Input range -99999.9999 to 99999.9999
Allowance for floor Q369 (incremental):
Distance used for the last infeed. Input range 0 to
99999.9999
Plunging depth Q202 (incremental): Infeed per
cut. Enter a value greater than 0. Input range 0 to
99999.9999
Path overlap factor Q370: Maximum stepover
factor k. The TNC calculates the actual stepover
from the second side length (Q219) and the tool
radius so that a constant stepover is used for
machining. Input range: 0.1 bis 1.9999.
Feed rate for milling Q207: Traversing speed of
the tool in mm/min while milling. Input range 0 to
99999.999 alternatively FAUTO, FU, FZ
Feed rate for finishing Q385: Traversing speed of
the tool in mm/min, while milling the last infeed.
Input range 0 to 99999.9999; alternatively FAUTO,
FU, FZ
Feed rate for pre-positioning Q253: Traversing
speed of the tool in mm/min when approaching
the starting position and when moving to the next
pass. If you are moving the tool transversely to
the material (Q389=1), the TNC moves the tool
at the feed rate for milling Q207 . Input range 0 to
99999.9999, alternatively FMAX, FAUTO
Clearance to side Q357 (incremental): 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.
Input range 0 to 99999.9999
Set-up clearance Q200 (incremental): Distance
between tool tip and workpiece surface. Input range
0 to 99999.9999; alternatively PREDEF
TNC 620 | User's Manual Cycle Programming | 3/2014
= 0
Q347
Q348
Q349
= -1
= -2
NC blocks
8 CYCL DEF 233 FACE MILLING
Q215=0 ;MACHINING OPERATION
Q389=2 ;MILLING STRATEGY
Q350=1 ;MILLING DIRECTION
Q218=120 ;1ST SIDE LENGTH
Q219=80 ;2ND SIDE LENGTH
Q227=0 ;STARTNG PNT 3RD AXIS
Q386=-6 ;END POINT 3RD AXIS
Q369=0.2 ;ALLOWANCE FOR
FLOOR
Q202=3 ;MAX. PLUNGING DEPTH
Q370=1 ;TOOL PATH OVERLAP
Q207=500 ;FEED RATE FOR
MILLING
Q385=500 ;FINISHING FEED RATE
Q253=750 ;F PRE-POSITIONING
Q357=2 ;CLEARANCE TO SIDE
Q200=2 ;SET-UP CLEARANCE
Q204=50 ;2ND SET-UP
CLEARANCE
Q347=0 ;1ST LIMIT
Q348=0 ;2ND LIMIT
Q349=0 ;3RD LIMIT
Q220=0 ;CORNER RADIUS
Q368=0 ;ALLOWANCE FOR SIDE
Q338=0 ;INFEED FOR FINISHING
9 L X+0 Y+0 R0 FMAX M3 M99
10
= +1
= +2
247