Flow Chart: Tool Change - Siemens SINUMERIK 828D Commissioning Manual

9.8.2

Flow chart: Tool change

Tool change program sequence (PLC)
The sequence described here describes the change between magazine and spindle. The
changing of manual tools as well as loading and unloading are not taken into account. These
sequences are described in:
● Example: Loading/unloading (Page 296)
● Example: Change manual tools (Page 298)
The machine data default setting is selected such that the job for "Prepare tool change" is
triggered with the T command on the interface:
N10 T = "Tool name" M6
The block preprocessing is not interrupted. M6 is used to start the tool change subprogram
(L6) at the same time. As soon as the job for "Prepare tool change" has been acknowledged
and in the tool change subprogram the M code for tool change output has been reached, the
"Execute tool change" job is output to the interface (block splitting).
A tool change command (M206) must always precede a prepare tool change command. A
change command without a previous "Prepare tool change" job will not initiate a job from the
tool management.
You will find the expression 1:1 change in the program sequence. This means that the tool
change will be carried out in a single cycle. The tool from the spindle (old tool) will be set
down at the magazine location of the new tool. No additional magazine positioning is
required. In this case, the target location of the old tool in the tool management job is the
same as the source location of the new tool (DB43xx.DBW6 and DBW8 are equal to DBW18
and DBW20).
A 1:1 change is not possible for:
● Tools with different location types
● Different tool sizes
● Fixed-location tools
By programming T0 in the NC program, a tool change is initiated without a new tool. Only the
spindle tool is transported to the magazine (empty the spindle).
①
You can see the different acknowledgment options from the steps. Job-related
acknowledgments and asynchronous messages are used.
Please take the transfer steps used from the table in Section Example: Acknowledgment
steps (milling machine) (Page 329)
Turning and Milling
Commissioning Manual, 02/2012, 6FC5397-3DP40-3BA0
⑭
... refer to the steps in the flow chart below.
9.8 Application example for milling machine
Tool management
319