Cycle Parameters - HEIDENHAIN TNC 620 User Manual

UNIVERSAL DRILLING (Cycle 203, DIN/ISO: G203, software option

Cycle parameters

Set-up clearance Q200 (incremental): Distance
between tool tip and workpiece surface. Input range
0 to 99999.9999
Depth Q201 (incremental): Distance between
workpiece surface and bottom of hole. Input range
-99999.9999 to 99999.9999
Feed rate for plunging Q206: Traversing speed of
the tool in mm/min during drilling. Input range 0 to
99999.999, alternatively FAUTO, FU
Plunging depth Q202 (incremental): Infeed per cut.
Input range 0 to 99999.9999. The depth does not
have to be a multiple of the plunging depth. The
TNC will go to depth in one movement if:
the plunging depth is equal to the depth
the plunging depth is greater than the depth and
no chip breaking is defined
Dwell time at top Q210: Time in seconds that the
tool remains at set-up clearance after having been
retracted from the hole for chip removal. Input range
0 to 3600.0000
Coordinate of workpiece surface Q203 (absolute):
Coordinate of the workpiece surface. Input range
-99999.9999 to 99999.9999
2nd set-up clearance Q204 (incremental):
Coordinate in the spindle axis at which no collision
between tool and workpiece (fixtures) can occur.
Input range 0 to 99999.9999
Decrement Q212 (incremental): Value by which the
TNC decreases the plunging depth Q202 after each
infeed. Input range 0 to 99999.9999
No. of breaks before retracting Q213: Number
of chip breaks after which the TNC is to withdraw
the tool from the hole for chip removal. For chip
breaking, the TNC retracts the tool each time by the
value in Q256. Input range 0 to 99999
Minimum plunging depth Q205 (incremental): If
you have entered a decrement, the TNC limits the
plunging depth to the value entered with Q205.
Input range 0 to 99999.9999
TNC 620 | User's Manual Cycle Programming | 3/2014
19)
NC blocks
11 CYCL DEF 203 UNIVERSAL DRILLING
Q200=2 ;SET-UP CLEARANCE
Q201=-20 ;DEPTH
Q206=150 ;FEED RATE FOR
PLNGNG
Q202=5 ;PLUNGING DEPTH
Q211=0 ;DWELL TIME AT TOP
Q203=+20 ;SURFACE COORDINATE
Q204=50 ;2ND SET-UP
CLEARANCE
Q212=0.2 ;DECREMENT
Q213=3 ;CHIP BREAKING
Q205=3 ;MIN. PLUNGING DEPTH
Q211=0.25 ;DWELL TIME AT
BOTTOM
Q208=500 ;RETRACTION FEED
RATE
Q256=0.2 ;DIST. FOR CHIP BRKNG
Q395=0 ;DEPTH REFERENCE
3
3.6
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