Siemens SINUMERIK 802D sl Wartungshandbuch PDF herunterladen (Seite 62)

Manual machining

5.4 Manual machining using cycles (functions)

Manual Machine Plus Turning

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

Drilling

The machining sequence is as follows:

1. Starting from the current axis position, the tool is traversed to the cycle start point in the

longitudinal axis. This is calculated internally from the value for the "Reference z0"

parameter (taking into account the clearance distance).

2. The transverse axis is positioned to the center of rotation.

3. The first infeed in the axial axis (as defined in the "Infeed Max." parameter) is then

performed.

4. The subsequent traversing movement in the axial axis depends on whether "chip

breaking" or "deswarfing" has been selected. With "chip breaking" the tool is retracted in

the longitudinal axis by the value set in the "return travel" parameter; with "deswarfing"

the longitudinal axis is positioned at the cycle start point.

5. The subsequent infeeds in the longitudinal axis are always calculated in the same way:

new infeed value = last infeed value x factor + return travel value The new infeed value is

monitored to ensure that it complies with the value for the "Infeed Min." parameter. If the

infeed value is below the minimum infeed, this value is imposed, provided that the drilling

depth allows it. The calculation is followed by the infeed in the longitudinal axis.

6. Infeed motion and "chip breaking/deswarfing" then alternate until the drilling depth

specified in the "Length I" parameter is reached.

7. Once the required drilling depth is reached, the waiting time specified in the "Dwell t"

parameter begins.

8. At the end of this waiting time, the tool is traversed to the cycle start point in the

longitudinal axis.

See also

Principle operating sequence (Page 54)

General parameters (Page 58)

5.4.4 Manual thread tapping

Functionality

The "Manual thread tapping" function is designed to produce internal threads in the turning

center, either with a compensating chuck or in a rigid tapping operation.

Before you start the cycle, you must position the tool in such a way that it can approach the

programmed Z initial position without risk of collision. The function itself will position the tool

on the center of rotation.

The machining feedrate is calculated from the programmed spindle speed and the thread

pitch. This feedrate might not be the same as the programmed feedrate!

If you have selected "cutting rate" as the spindle type, the value set for the maximum spindle

speed with G96 or the value for the maximum spindle speed is applied for thread tapping.

(because the thread is tapped in the turning center, i.e. X=0)

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Siemens SINUMERIK 802D sl Wartungshandbuch Seite 62