HEIDENHAIN TNC 620 User Manual page 173

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
HEIDENHAIN | TNC 620 | User's manual for cycle programming | 9/2015
FACE MILLING (Cycle 233)
NC blocks
8 CYCL DEF 233 FACE MILLING
Q215=0
Q389=2
Q350=1
Q218=120
Q219=80
Q227=0
Q386=-6
Q369=0.2
Q202=3
Q370=1
Q207=500
Q385=500
Q253=750
Q357=2
Q200=2
Q204=50
Q347=0
Q348=0
Q349=0
Q220=2
Q368=0
Q338=0
9 L X+0 Y+0 R0 FMAX M3 M99
5.9
;MACHINING
OPERATION
;MILLING STRATEGY
;MILLING DIRECTION
;1ST SIDE LENGTH
;2ND SIDE LENGTH
;STARTNG PNT 3RD
AXIS
;END POINT 3RD AXIS
;ALLOWANCE FOR
FLOOR
;MAX. PLUNGING
DEPTH
;TOOL PATH OVERLAP
;FEED RATE FOR
MILLING
;FINISHING FEED RATE
;F PRE-POSITIONING
;CLEARANCE TO SIDE
;SET-UP CLEARANCE
;2ND SET-UP
CLEARANCE
;1ST LIMIT
;2ND LIMIT
;3RD LIMIT
;CORNER RADIUS
;ALLOWANCE FOR SIDE
;INFEED FOR FINISHING
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