Programming The T Number; Programming M6 - Siemens SINUMERIK 828D Function Manual

Tool MDs
The following machine data affect the way tools and cutting edges (D numbers) work in the NCK:
Machine data
MD20270 $MC_CUTTING_EDGE_DEFAULT
MD20130 $MC_CUTTING_EDGE_RESET_VALUE
MD20120 $MC_TOOL_RESET_VALUE
MD20121 $MC_TOOL_PRESEL_RESET_VALUE
MD22550 $MC_TOOL_CHANGE_MODE
MD22560 $MC_TOOL_CHANGE_M_CODE
MD20110 $MC_RESET_MODE_MASK
MD20112 $MC_START_MODE_MASK
18.3.4

Programming the T number

When the "Flat D number structure" function is active, NC address T continues to be evaluated, i.e., the
programmed T number and the active T number are displayed. However, the NC determines the D number
without reference to the programmed T value.
The NC detects 1 master spindle per channel (via the spindle number, which can be set using MD).
Compensations and the M6 command (tool change) are only calculated in reference to the master spindle.
An address extension T is interpreted as a spindle number (e.g., T2 = 1; tool 1 to be selected on spindle 2); a tool
change is only detected if spindle 2 is the master spindle.
18.3.5

Programming M6

MD22550 and MD22560
The NC detects 1 master spindle per channel (via the spindle number, which can be set using MD).
Compensations and the M6 command (tool change) are only calculated in reference to the master spindle.
Whether the tool change command is performed with an M function is defined via the machine data:
MD22550 $MC_TOOL_CHANGE_MODE (new tool compensation with M function).
T is used as the tool preparation command.
The name of the M function for the tool change is defined via the machine data:
MD22560 $MC_TOOL_CHANGE_M_CODE (M function for tool change).
The default is M6. An address extension of M6 is interpreted as a spindle number.
Basic Functions
Function Manual, 09/2011, 6FC5397-0BP40-2BA0
Meaning
Standard tool cutting edge after tool
change
Tool cutting edge - Length
compensation on power-up (RESET /
TP end)
Tool - Length compensation on power-
up (RESET / TP end)
Preselect tool on RESET
Tool change with M function instead of T
function
M function for tool change
Definition of basic control settings after
RESET/TP-End)
Determination of basic control settings
after NC start
W1: Tool offset
18.3 Flat D number structure
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