Tool Change And Activation Of Tool Offset; Selection Of Tool And Cutting Edge And Tool Change - Siemens SINUMERIK 840D sl Function Manual

2.2

Tool change and activation of tool offset

2.2.1

Selection of tool and cutting edge and tool change

Tool selection
A tool is selected in the NC program with the T function.
The T function or the tool number can assume the following integer numbers:
● Minimum value: T0 (no tool)
● Maximum value: T32000 (tool with number 32000)
Whether the new tool will be loaded immediately by means of the T function depends on the
setting in the machine data:
MD22550 $MC_TOOL_CHANGE_MODE (new tool offset for M function)
Tool change immediate
MD22550 $MC_TOOL_CHANGE_MODE = 0
The new tool is loaded immediately with the T function.
This setting is primarily used for turning machines with turret magazines.
Tool change with M function
MD22550 $MC_TOOL_CHANGE_MODE = 1
The new tool is prepared for changing with the T function.
This setting is primarily used for milling machines with tool magazine in order to position the
new tool into the tool change position without interrupting the machining process.
The M function for tool change allows the old tool to be removed from the spindle and the new
tool to be loaded into the spindle.
The M function for tool change is defined in the machine data:
MD22560 $MC_TOOL_CHANGE_M_CODE (M function for tool change)
Tools
Function Manual, 06/2019, A5E47435126B AA
2.2 Tool change and activation of tool offset
W1: Tool offset
21