Siemens SINUMERIK 840Di Function Manual page 1736

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Detailed Description

2.4 Tool: Tool radius compensation 2D (TRC)

System variables

Changing the WCS between the SAR block and the read operation has no effect on the

position values.

Supplementary conditions

• Any further NC commands (e.g., auxiliary function outputs, synchronous axis movements,

• If the end point P

Velocities in the SAR subblocks on retraction

can be read in the WCS as system variables during approach.

(start point) in WCS

(contour start point) in WCS

If the content of $P_APR and $P_AEP is valid, i.e., if these contain the

position values belonging to the last SAR approach block programmed.

The positions of an older SAR approach block are read.

positioning axis movements, etc.) can be programmed in a SAR block.

These are executed in the first subblock on approach and in the last subblock on

is taken not from the SAR block but from a subsequent traversing

block, the actual SAR contour (straight line, quadrant or semicircle) is traversed in this

The last subblock of the original SAR block does not then contain traversing information

for geometry axes. It is always output, however, because further actions (e.g., single

axes) may have to be executed in this block.

Function Manual, 08/2005 Edition, 6FC5397-0BP10-0BA0

Tool Compensation (W1)

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