Controlling The Program Run; Program Control - Siemens SINUMERIK 840D sl Operating Manual

Procedure
6.8

Controlling the program run

6.8.1

Program control

You can change the program sequence in the "AUTO" and "MDA" modes.
Abbreviation/program con‐
trol
PRT
No axis motion
DRY
Dry run feedrate
RG0
Reduced rapid traverse
M01
Programmed stop 1
Milling
Operating Manual, 05/2017, A5E40868956
The required ShopMill program is in the block display.
1. Press the "Block search" softkey.
2. Position the cursor to the position block.
3. Press the "Start search" softkey.
The "Block search" window opens.
All of the technologies used in the program are listed.
4. Select the required technology and press the "OK" softkey
The selected technology is displayed in the "Search" window.
5. Enter the number of the starting hole and press the "OK" softkey.
Program processing starts with the specified technology at the specified
starting hole - and goes to all additional positions of this position pattern
and all of the following position patterns.
Note
If you have hidden certain positions, then only the displayed positions
are applicable for the starting hole number.
Mode of operation
The program is started and executed with auxiliary function outputs and dwell times. In this
mode, the axes are not traversed.
The programmed axis positions and the auxiliary function outputs are controlled this way.
Note: You can activate program execution without any axis motion using the "Dry run feedrate".
The traversing velocities programmed in conjunction with G1, G2, G3, CIP and CT are replaced
by a defined dry run feedrate. The dry run feedrate also applies instead of the programmed
revolutional feedrate.
Caution: Do not machine any workpieces when "Dry run feedrate" is active because the altered
feedrates might cause the permissible tool cutting rates to be exceeded and the workpiece or
machine tool could be damaged.
In the rapid traverse mode, the traversing speed of the axes is reduced to the percentage value
entered in RG0.
Note: You define the reduced rapid traverse in the settings for automatic operation.
The processing of the program stops at every block in which supplementary function M01 is
programmed. In this way you can check the already obtained result during the processing of a
workpiece.
Note: In order to continue executing the program, press the <CYCLE START> key again.
Machining the workpiece
6.8 Controlling the program run
173