Compensation Memory Structure - Siemens SINUMERIK 828D Function Manual

W1: Tool offset
18.2 Tool
Activating the tool compensations
D1 to D9 activate the tool compensation for a cutting edge on the active tool. Tool length compensation and tool
radius compensation can be activated at different times:
• Tool length compensation (TLC) is performed on the first traversing motion of the axis, on which the TLC is to
act.
This traversing motion must be a linear interpolation (G0,G1, POS,POSA) or polynomial interpolation (POLY).
If the POS/POSA axis is one of the active geometry axes, the tool length compensation is applied with the first
axis motion in which the WLK is supposed to act.
• Tool radius compensation (TRC) becomes active when G41/G42 is programmed in the active plane (G17,
G18 or G19).
The selection of tool radius compensation with G41/G42 is only permitted in a program block with G0 (rapid
traverse) or G1 (linear interpolation).
18.2.2

Compensation memory structure

Tool compensation memory size
Each channel can have a dedicated tool compensation memory (TO unit).
Which tool compensation memory exists for the relevant channel is set with the machine data:
MD28085 $MC_MM_LINK_TOA_UNIT (Assignment of TO unit to a channel).
The maximum number of tool cutting edges for all tools managed by the NCK is set with the machine data:
MD18100 $MN_MM_NUM_CUTTING_EDGES_IN_TOA (number of tool cutting edges in NCK).
Tools
The TO memory consists of tools numbered T1 to T32000.
Each tool can be set up via TOA files or individually, using the "New tool" soft key. Compensation values not
required must be assigned the value zero. (this is the default setting when the offset memory is created): The
individual values in the offset memory (tool parameters) can be read and written from the program using system
variables.
Note
The tools (T1 to T32000) do not have to be stored in ascending order or contiguously in the
tool compensation memory, and the first tool does not have to be assigned number T1.
1424
Function Manual, 09/2011, 6FC5397-0BP40-2BA0
Basic Functions