Siemens SINUMERIK 828D Programming Manual page 407

Further information
Reference point at the tool
When tool length compensation is active, the tip of the tool is monitored as reference point,
otherwise it is the toolholder reference point.
Consideration of the tool radius must be activated separately. This is done using channel-
specific machine data:
MD21020 $MC_WORKAREA_WITH_TOOL_RADIUS
If the tool reference point lies outside the working area defined by the working area limitation
or if this area is left, the program sequence is stopped.
Note
If transformations are active, then tool data are taken into consideration (tool length and tool
radius) can deviate from the described behavior.
References:
Function Manual, Basic Functions; Axis Monitoring, Protection Zones (A3),
Chapter: "Monitoring the working area limitation"
Programmable working area limitation, G25/G26
An upper (
values are effective immediately and remain effective for the corresponding MD setting (→
MD10710 $MN_PROG_SD_RESET_SAVE_TAB) after RESET and after being powered-up
again.
Note
The CALCPOSI subroutine is described in the Job Planning Programming Manual Using this
subroutine before any traversing motion is made, it can be checked as to whether the
predicted path is moved through taking into account the working area limits and/or the
protection zones.
Fundamentals
Programming Manual, 07/2010, 6FC5398-1BP40-0BA0
) and a lower ( ) working area limitation can be defined for each axis. These
G26 G25
Supplementary commands
14.3 Working area limitation
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