Siemens SINUMERIK 880 GA2

9 Tool Offsets 05.91
9.1 Tool data
The basic version of the tool offset memory provides 8 Kbytes. For the SINUMERIK 880 it can
be expanded to 32 KB. The number of tool compensation memories is calculated from the
number of tool parameters P0...P9 (NC MD 13) and the memory configuration (8, 16, 32 KB)
as follows:
Number of tool offset memories =
memory configuration (bytes)
number of tools - parameters ·4
The standard display can show up to 819 tool offset memories with 10 tool parameters each.
9.2 Turning machine: Tool offset without using tool nose radius
compensation (TNRC)
The effective tool offset is derived from the sum of the tool length compensation and any
external, additive tool length compensation. The sum corresponds to dimension XSF or ZSF.
The path of tool nose radius centre S is programmed. The length compensation is referred to
the tool nose radius centre.
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S
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XSF
ZSF
P Theoretical tool tip
S Tool nose radius centre
F Slide reference point
t
Incorporation of compensation
The difference between the old and new offset values is formed when the tool offset number is
changed.
The question as to whether the difference is traversed directly following the change or is not
taken into consideration until the programmed traverse of the corresponding axis is resolved
on start-up.
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With TNRC type 1 to 9 (G41, G42) the difference in addition to the tool
nose radius is traversed in both axes. No axis command is required for
traversing the tool offset or a difference.
9–2 © Siemens AG 1991 All Rights Reserved 6ZB5 410-0HD02
SINUMERIK 880, (PG)