Siemens SINUMERIK 840D sl Function Manual page 973

Parameter number for radius calculation $TC_TPG9
This parameter specifies which offset values are used for the GWPS calculation and tool
monitoring of the minimum wheel radius ($TC_TPG3).
$TC_TPG9 = 3
$TC_TPG9 = 4
$TC_TPG9 = 5
$TC_TPG9 = 6
Access from part program
Parameters can be read and written from the part program.
Example
Read the current width of tool 2 and store in R10
Write value 2000 to the maximum speed of tool 3
$P_ATPG[m] for current tool
This system variable allows the tool-specific grinding data for the current tool to be
accessed.
m:
Example:
Parameter 3 ($TPG3[<T No.>])
$P_ATPG[3]=R10
Note
The monitoring data apply to both the left-hand and the right-hand cutting edge of the
grinding wheel.
The tool-specific grinding data are activated when GWPSON (select constant grinding wheel
surface speed) and TMON (select tool monitoring) are programmed. To activate a data which
has been modified, it is necessary to program GWPSON or TMON again.
The length compensations always specify the distances between the tool carrier reference
point and the tool tip in the Cartesian coordinates (must be noted for inclined grinding
wheel).
Extended Functions
Function Manual, 01/2008, 6FC5397-1BP10-3BA0
Length 1 (geometry + wear + base, depending on tool type)
Length 2 (geometry + wear + base, depending on tool type)
Length 3 (geometry + wear + base, depending on tool type)
Radius
Parameter number (data type: Real)
Grinding-specific tool offset and tool monitoring (W4)
18.2 Tool offset for grinding operations
Programming
R10 = $TC_TPG5 [2]
$TC_TPG6 [3] = 2000
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