Programming The Approach/Retraction Cycle - Siemens sinumerik 840D sl Operating Manual

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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.

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.

If 3 or 6 positions are not sufficient for the approach/retraction, you can call the cycle several

times in succession to program further positions.

Note that the tool will move from the last position programmed in the approach/retraction

cycle directly to the starting point for the next machining operation.

Sinumerik 828d