Compatibility For Cycle Support; Programming The Approach/Retraction Cycle - Siemens SINUMERIK 840D sl Operating Manual

Creating a ShopTurn program

9.16 Programming the approach/retraction cycle

Procedure
9.15.6

Compatibility for cycle support

The cycle support is generally upwards compatible. This means that cycle calls in NC programs
can always be recompiled with a higher software version, changed and then run again.
When transferring NC programs to a machine with a lower software version, it cannot be
guaranteed, however, that the program will be able to be changed by recompiling cycle calls.
9.16 Programming the approach/retraction cycle
If you wish to shorten the approach/retraction for a machining cycle or solve a complex
geometrical situation when approaching/retracting, you can generate a special cycle. In this
case, the approach/retraction strategy normally used is not taken into account.
You can insert the approach/retraction cycle between any machining step program blocks, but
not within linked program blocks.
Starting point
The starting point for the approach/retraction cycle is the safety clearance approached after
the last machining operation.
Tool change
If you want to perform a tool change, you can move the tool through a total of 3 positions (P1
to P3) to the tool change point and through a maximum of 3 additional positions (P4 to P6) to
the next starting point. If the tool does not need to be changed, however, you have a total of
6 positions available for the approach to the next starting position.
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1. Select the desired cycle call and press the <Cursor right> key.
The associated input screen of the selected cycle call is opened.
- OR -
Press the <SHIFT + INSERT> key combination.
This starts the edit mode for this cycle call and you can edit it like a normal
NC block. This means that it is possible to generate an empty block before
the cycle is called. For instance, to insert something before a cycle that
is located at the beginning of the program.
Note: In edit mode, the cycle call can be changed in such a way that it
can no longer be recompiled in the parameter screen.
You exit the edit mode by pressing the <SHIFT + INSERT> key combi‐
nation.
- OR -
You are in the edit mode and press the <INPUT> key.
A new line is created after the cursor position.
Operating Manual, 05/2017, A5E40868721
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