HEIDENHAIN TNC 620 User Manual page 91

3
SINGLE-LIP DEEP-HOLE DRILLING (Cycle 241, DIN/ISO: G241, 3.10
software option 19)
Drilling speed Q428: Desired speed for drilling.
Input range 0 to 99999
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
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
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.
Feed rate factor Q401: Factor by which the TNC
reduces the feed rate after the dwell depth has
been reached. Input range 0 to 100
Plunging depth Q202 (incremental): Infeed per cut.
The depth does not have to be a multiple of the
plunging depth. 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
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
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TNC 620 | User's Manual Cycle Programming | 3/2014