100 Fixed Cycles: Drilling
3.10 SINGLE-FLUTED DEEP-HOLE DRILLING (Cycle 241, DIN/ISO: G241)
U Rotat. dir. of entry/exit (3/4/5) Q426: Desired
direction of spindle rotation when tool moves into and
retracts from the hole. Input range:
3: Spindle rotation with M3
4: Spindle rotation with M4
5: Movement with stationary spindle
U Spindle speed of entry/exit Q427: Desired spindle
speed when tool moves into and retracts from the
hole Input range 0 to 99999
U Drilling speed Q428: Desired speed for drilling Input
range 0 to 99999
U M function for coolant on? Q429: M function for
switching on the coolant The TNC switches the
coolant on if the tool is in the hole at the deepened
starting point Input range 0 to 999
U M function for coolant off? Q430: M function for
switching off the coolant The TNC switches the
coolant off if the tool is at the hole depth. Input range
0 to 999
U Dwell depth Q435 (incremental): Coordinate in the
spindle axis at which the tool is to dwell. If 0 is
entered, the function is not active (standard setting)
Application: During machining of through-holes some
tools require a short dwell time before exiting the
bottom of the hole in order to transport the chips to
the top. Define a value smaller than the hole depth
Q201; input range 0 to 99999.9999.
Example: NC blocks
11 CYCL DEF 241 SINGLE-LIP DEEP-HOLE
DRILLING
Q200=2 ;SETUP CLEARANCE
Q201=-80 ;DEPTH
Q206=150 ;FEED RATE FOR PLNGNG
Q211=0.25 ;DWELL TIME AT DEPTH
Q203=+100 ;SURFACE COORDINATE
Q204=50 ;2ND SETUP CLEARANCE
Q379=7.5 ;STARTING POINT
Q253=750 ;F PRE-POSITIONING
Q208=1000 ;RETRACTION FEED RATE
Q426=3 ;DIR. OF SPINDLE ROT.
Q427=25 ;ROT. SPEED INFEED/OUT
Q428=500 ;DRILLING SPEED
Q429=8 ;COOLANT ON
Q430=9 ;COOLANT OFF
Q435=0 ;DWELL DEPTH
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