Siemens SINUMERIK 802D sl Wartungshandbuch PDF herunterladen (Seite 80)

Manual machining

5.4 Manual machining using cycles (functions)

Manual Machine Plus Turning

80 Programming and Operating Manual, 06/2009, 6FC5398-6CP10-1BA0

Parameter Description

Linear infeed/

Degressive infeed

This function key is used to switch between "linear infeed" and "degressive infeed". "Linear

infeed" means that roughing always takes place at a constant depth of cut, and the internal

infeed calculation is designed so that the value for the "max. infeed depth" (m1) is not

exceeded during the entire thread cutting operation. "Degressive infeed" on the other hand

means that the volume of cut is kept constant throughout the entire thread cutting operation.

In this case too, the value for "max. infeed depth" (m1) is observed throughout the entire

operation.

Number of thread starts The number of thread starts is defined here.

Softkey

This softkey is used to select remachining or thread recutting (thread repair).

Thread cutting

The machining sequence is as follows:

1. Starting from the current axis position, the start position for the thread (d1/z0) is

approached in rapid traverse.

2. This is followed by infeed by the first depth of cut.

3. The controller then waits for the next zero mark from the spindle encoder in order to start

the axis movements (longitudinal axis and/or transverse axis) (depending on the thread

geometry).

4. Once the end position for the thread has been reached in both axes, the tool is withdrawn

from the workpiece in rapid traverse.

5. The start position for the thread is then approached in the longitudinal and transverse

axis in rapid traverse, observing a clearance distance.

6. Infeed to the next depth of cut.

7. Wait for the next marker pulse from the spindle encoder to start the axes...

This process continues until all cuts have been completed. An additional finishing cut to

smooth the thread is then performed and the start position for the thread is approached in

the longitudinal and transverse axes.

8. There is now a choice of 2 options:

– Machining is now complete and the "Execute" screen can be closed with the "Abort"

softkey.

– If you wish to continue machining the thread, e.g. if thread finishing is required, press

NC Start again.

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Siemens SINUMERIK 802D sl Wartungshandbuch Seite 80