Kinematics Grid (Cycle 453, Din/Iso: G453, Option); Cycle Run - HEIDENHAIN TNC 640 User Manual

19
Touch Probe Cycles: Automatic Kinematics Measurement | KINEMATICS GRID (Cycle 453, DIN/ISO: G453,
19.6 KINEMATICS GRID (Cycle 453, DIN/ISO:
G453, option)

Cycle run

Even if your machine was already optimized regarding positioning
errors (e.g. via Cycle 451), residual errors at the Tool Center Point
(TCP) during tilting of the rotary axes may remain. Such errors
occur particularly with swivel-head machines. These can result for
example from component errors (e.g. a bearing error) with head
rotary axes.
Cycle 453 KINEMATICS GRID enables these errors to be
determined and compensated in accordance with the tilting axis
positions. The software options No. 48 KinematicsOpt and No.
52 KinematicsComp are needed for this. With this cycle and with
a 3-D TS touch probe you measure a HEIDENHAIN calibration
sphere that you have attached to the machine table. The cycle then
moves the touch probe automatically to positions arranged grid-
like around the calibration sphere. The machine tool builder defines
these tilting axis positions. You can arrange the positions in up
to three dimensions. (Each dimension is a rotary axis). After the
probing process on the sphere, compensation of the errors can be
performed with a multi-dimensional table. The machine tool builder
defines this compensation table (*.kco) and specifies its storage
location.
If you work with Cycle 453 you execute the cycle at several
different positions in the working space. You can check immediately
whether the compensation with Cycle 453 has the desired positive
effects on machine accuracy. This type of compensation for the
specific machine is only suitable if the desired improvements are
achieved with identical compensation values at several positions.
If this is not the case, the errors should be searched for outside of
the rotary axes.
Perform the measurement with Cycle 453 with optimized rotary
axis positioning error. For this purpose previously work with e.g.
Cycle 451.
HEIDENHAIN recommends using the calibration
spheres
100 (ID number
high rigidity and are designed especially for machine
calibration. Please contact HEIDENHAIN if you have any
questions in this regard.
For Cycle 453 KINEMATICS GRID the software
option 48 KinematicsOpt and software option 52
KinematicsComp are required.
This feature must be enabled and adapted by the
machine tool builder.
To use this cycle the machine tool builder must
previously have created and configured a compensation
table (*kco) and carried out other settings.
710
KKH 250 (ID number 655475-01) or
655475-02), which have particularly
Z
KKH
HEIDENHAIN | User's manual for cycle programming | 10/2017
option)
X