Drilling Cycles - Siemens SINUMERIK 808D User Manual

R e compiling
Recompiling of program codes serves to make modifications to an existing program using the cycle support.
12.4

Drilling cycles

12.4.1 General information
Drilling cycles are motional sequences specified according to DIN 66025 for drilling, boring, tapping, etc.
They are called in the form of a subroutine with a defined name and a parameter list.
The drilling cycles can be modal, that is, they are executed at the end of each block containing motion commands. Further
cycles created by the user can also be called modally.
There are two types of parameters:
● Geometrical parameters
● Machining parameters
The geometrical parameters are identical for all drilling cycles, drilling pattern cycles and milling cycles. They define the
reference and retraction planes, the safety clearance and the absolute or relative final drilling depth. Geometrical parameters
are assigned once during the first drilling cycle CYCLE81.
Programming and Operating Manual (Milling)
6FC5398-4DP10-0BA6, 09/2017
3. Enter the values directly (numerical values) or indirectly (R parameters, for example, R27,
or expressions consisting of R parameters, for example, R27 + 10).
If numerical values are entered, then the control system automatically performs a check to
see whether the value lies within the permitted range.
4. Use this key to select values for some parameters that may have only a few values for se-
lection.
5. For drilling cycles, it is also possible to call a cycle modally with this key. To deselect the
modal call, move the cursor to the next blank line of the program and press the softkey
below:
6. Press this softkey to confirm your input. To cancel the input, press the softkey below:
Position the cursor on the program line for the cycle to be modified and press this softkey. This
reopens the input screen of parameter assignment for the cycle, and you can modify and accept the
parameter values.
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