HEIDENHAIN ND 1200R - Manual (Page 71)

ND 1200R Radial 71
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p Error correction
The ND 1200R provides Linear Error Correction for the R axis. LEC
compensates for encoder and machine travel variations with error
correction coefficients. Coefficients are determined by comparing
actual measurements of a standard to the nominal values
imprinted on it.
Linear error correction (LEC)
Linear Error Correction is performed in the LEC setup screen and
compensates for variations along the R axis using one correction
coefficient for the entire range of motion on the axis. For example, an
LEC coefficient of 0.0002 per inch applied to a 6 inch measurement
along an axis produces a result of 6.0012 inches. To apply LEC to the
R axis:
 Press MENU>SETUP to display the setup menu.
 Highlight the LEC menu item and make sure that all correction
values are 1.0.
Press MENU>SETUP to display the
Setup menu Highlight the LEC menu item and make
sure that all correction values are 1.0