HEIDENHAIN PT 880 - Manual (Page 119)

POSITIP 880 119
II – 2 Installation Set
u
p Error Compensation
The distance a cutting tool travels, measured by an encoder, can in
certain cases, differ from the actual tool travel. This error can occur
due to ball screw pitch error or deflection and tilting of axes. This error
can either be linear or non-linear. You can determine these errors with
a reference measurement system, e.g. the VM 101 from
HEIDENHAIN or with gauge blocks. From an analysis of the error it can
be determined which form of compensation is required, linear or non-
linear error.
The POSITIP 880 provides the opportunity to compensate for these
errors and each axis can be programmed separately with the
appropriate compensation.
Error compensation is only available when using linear
encoders.