Description Of Function - Siemens SINUMERIK 828D Function Manual

18.11.2

Description of function

Sum offsets
Several sum offsets (DL numbers) can be defined per D number. This allows you to determine, for example,
workpiece­location­dependent compensation values and assign them to a cutting edge. Sum offsets have the
same effect as wear, i.e., they are added to the compensation values of the D number. The data are permanently
assigned to a D number.
Attitudes
You can define the following settings in machine data:
• Activate sum offset
• Define maximum quantity of DL data sets to be created in NCK memory
• Define maximum quantity of DL numbers to be assigned to a D number
• Define whether the sum offsets (fine/coarse) are to be saved during data backup
• Define the sum offset to be activated, if:
- A new cutting edge compensation is activated
- An operator panel front RESET is performed
- An operator panel front START is performed
- The end of the program has been reached
The name is oriented to the logic of the corresponding machine data for tools and cutting edges.
The "setup offset" and "sum offset fine" can be read and written via system variables and corresponding OPI
services.
Note
When tool management is active, a machine data can be used to define whether the sum
offset of a tool activated during a programmed tool change remains unchanged or is set to
zero.
Summary of compensation parameters $TC_DPx
The following general system variables were previously defined for describing a cutting edge:
$TC_DP1 Tool type
$TC_DP2 Length of cutting edge
Parameters for geometry and wear
Tool geometry compensations are assigned to system variables $TC_DP3 to $TC_DP11. System variables
$TC_DP12 to $TC_DP20 allow you to name a wear for each of these parameters.
Geometry Wear
$TC_DP3 $TC_DP12
$TC_DP4 $TC_DP13
Basic Functions
Function Manual, 09/2011, 6FC5397-0BP40-2BA0
Length compensations
Length 1
Length 2
W1: Tool offset
18.11 Sum offsets and setup offsets
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