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Accuracy requirements are becoming
increasingly stringent, particularly in the
area of 5-axis machining. Complex parts
need to be manufactured with precision
and reproducible accuracy even over long
periods.
The new TNC function KinematicsOpt
is an important component to help you
meet these high requirements: With a
HEIDENHAIN touch probe inserted, a
3-D touch probe cycle measures your
machine’s rotary axes fully automatically.
The results of measurement are the same
regardless of whether the axis is a rotary
table, a tilting table or a swivel head.
Inspecting and optimizing machine accuracy
– Easy calibration of rotary axes with KinematicsOpt (option)
To measure the rotary axes, a calibration
sphere is fixed at any position on the
machine table and probed with the
HEIDENHAIN touch probe. But first you
define the resolution of the measurement
and define for each rotary axis the range
that you want to measure.
From the measured values, the TNC
calculates the static tilting accuracy. The
software minimizes the spatial error arising
from the tilting movements and, at the
end of the measurement process, auto-
matically saves the machine geometry in
the respective machine constants of the
kinematics description.
Of course, a comprehensive log file is also
saved with the actual measured values and
the measured and optimized dispersion
(measure for the static tilting accuracy), as
well as the actual compensation values.
An especially rigid calibration sphere is nec-
essary for optimum use of KinematicsOpt.
This helps to reduce deformations that
occur as the result of probing forces. That
is why HEIDENHAIN offers calibration
spheres with highly rigid holders that are
available in various lengths.
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