HEIDENHAIN POSITIP 8000 Series Operating Instructions Manual page 98

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4.6.5 Performing error compensation
Mechanical influences such as guideway errors, tilting in the end positions,
tolerances of the mounting surface or poor mounting (Abbe error) may lead
to measuring errors. Error compensation enables the device to automatically
compensate for systematic measuring errors during machining of the workpieces.
One or more compensation factors can be defined by comparing nominal and actual
values.
A distinction is made between the following methods:
Linear error compensation (LEC): The compensation factor is calculated based
on the specified length of a calibration standard (nominal length) and the actual
distance traversed (actual length). The compensation factor is applied linearly to
the entire measuring range.
Segmented linear error compensation (SLEC): The axis is divided into multiple
segments with the help of a maximum of 200 supporting points. A distinct
compensation factor is defined and applied for every segment.
Subsequent modifications to the encoder settings can result in measuring
errors
If encoder settings such as the encoder input, encoder model, signal period, or
reference marks are changed, previously determined compensation factors may
no longer apply.
If you change encoder settings, then you need to reconfigure the error
compensation
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For all methods, the actual error curve must be exactly measured (e.g.,
with the help of a comparator measuring device or calibration standard).
Linear error compensation and segmented linear error compensation
cannot be combined with each other.
If you enable a reference point shift, then you need to reconfigure the
error compensation. This helps you avoid measuring errors.
Information for OEM and Setup users | Commissioning
NOTICE
HEIDENHAIN | POSITIP 8000 | Operating Instructions Turning | 03/2022