Tool Offsets - Siemens SINUMERIK 840D sl Function Manual

TE7: Continue machining - retrace support
15.9 Boundary conditions
15.9.2.8

Tool offsets

RESU can be used in conjunction with tool offsets.
However, as the traversing movements of the two geometry axes of the RESU working plane
are recorded in the basic coordinate system (BCS) and therefore after the tool offsets have
been taken into account, the tool offsets must be deactivated during retrace support (reverse
/ forward travel).
The tool offsets are deactivated during retrace support via the standard default settings of the
RESU-specific subroutine "CC_RESU_INI.SPF" (refer to INI program (CC_RESU_INI.SPF)
[Page 630]).
Specific instances of tool radius compensation, e.g. compensation on outside corners
G450 DISC=x may generate contour deviations between the contour traversed during retrace
support and the contour programmed in the machining program.
Contour deviations are always generated if tool radius compensation produces contour
elements that are non-linear or circular. For example, G450DISC=x, where x > 0, produces
parabolic or hyperbolic contour elements.
A full description of the tool radius compensation can be found in:
References:
/FB1/ Function Manual, Basic Functions; Tool Compensation (W1)
644
Function Manual, 09/2011, 6FC5397-2BP40-2BA0
Special Functions