Starting The Tool Change - Siemens SINUMERIK 840D sl Function Manual

17.5

Starting the tool change

17.5
Variants
The tool change can be actuated by:
● T function
● M command (preferably M06).
Parameter setting
Which control versions should be effective is defined with the machine data:
MD22550 $MC_TOOL_CHANGE_MODE
Value
0
1
The M command for tool change is defined in machine data:
MD22560 $MC_TOOL_CHANGE_M_CODE
Default setting is 6 (corresponding to DIN 66025).
Note
If the tool offset number is supplied from the PLC or an HMI tool manager, a block search
stop STOPRE must be inserted at a suitable point. STOPRE must be avoided, however, when
tool radius compensation (G41 / G42) or SPLINE interpolation are active, since several
blocks are required here in advance for the path calculation.
References
You will find further information about M functions which also apply to tool change M06 (e.g.
extended address, time of output to PLC, auxiliary function groups, behavior during block
search, behavior during overstore) in:
/FBSY/ Function Manual, Synchronized Actions
Extended Functions
Function Manual, 09/2009, 6FC5397-1BP20-0BA0
Description
The T function loads the new tool immediately.
New tool with T function prepared for change and
placed in the tool change position simultaneously
during the machining time.
The M command is used to remove the old tool
from the spindle and load the new tool.
W3: Tool change
17.5 Starting the tool change
Typical application
Turning machines with tool turret
Milling machines with a tool magazine,
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