UNIVERSAL DRILLING (Cycle 203, DIN/ISO: G203) 3.6
3
HEIDENHAIN | TNC 320 | User’s manual for cycle programming | 9/2016
75
Cycle parameters
Q200 Set-up clearance? (incremental): Distance
between tool tip and workpiece surface Input range
0 to 99999.9999
Q201 Depth? (incremental): Distance between
workpiece surface and bottom of hole. Input range
-99999.9999 to 99999.9999
Q206 Feed rate for plunging?: Traversing speed of
the tool in mm/min during drilling. Input range 0 to
99999.999, alternatively FAUTO, FU
Q202 Plunging depth? (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
Q210 Dwell time at the top?: Traversing speed of
the tool in mm/min during drilling. Input range 0 to
3600.0000
Q203 Workpiece surface coordinate? (absolute):
Coordinate of the workpiece surface. Input range
-99999.9999 to 99999.9999
Q204 2nd set-up clearance? (incremental):
Coordinate in the spindle axis at which no collision
between tool and workpiece (fixtures) can occur.
Input range 0 to 99999.9999
Q212 Decrement? (incremental): Value by which the
TNC decreases Q202 MAX. PLUNGING DEPTH after
each infeed. Input range 0 to 99999.9999
Q213 Nr of breaks before retracting?: 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
Q205 Minimum plunging depth? (incremental): If
you have entered Q212 DECREMENT,the TNC limits
the plunging depth to the value for Q205. Input
range 0 to 99999.9999
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 ;NR OF BREAKS
Q205=3 ;MIN. PLUNGING DEPTH
Q211=0.25 ;DWELL TIME AT DEPTH
Q208=500 ;RETRACTION FEED
RATE
Q256=0.2 ;DIST FOR CHIP BRKNG
Q395=0 ;DEPTH REFERENCE
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