Renishaw NC1 Programming Manual page 41

The effective tool length is written to the current tool register and
nominated edge number (D). By default, the current tool number and
edge will be set.
Format
[R02=1. R11=h R05=j R13=m R14=t R17=q R19=s
R25=y]
L9862
where [ ] denotes optional inputs
Example R02=1. R11=0.5 R05=0.25 R13=1. R14=2. R17=5.
R19=2500 R25=3.
L9862
Subroutine inputs
The following inputs are used with this subroutine:
R02=1. Set the length of the tool.
R02=1. is the default R02 input.
R05=j j= Experience value for length.
This value is the difference between the measured
length of the tool and the effective length when the tool
is under load during the cutting process. It is used to
refine the measured length, based on previous
experience of how the effective length differs from the
measured length when the tool is being used.
Default value: Not used.
R11=h h= Tolerance value that defines when the tool length is out
of tolerance.
When this input is used, the tool offset is not updated if
Tool length setting
39