Notes On Various Calibration Methods - HEIDENHAIN TNC 620 User Manual

18
Touch Probe Cycles: Automatic Kinematics Measurement
18.4 MEASURE KINEMATICS (Cycle 451, DIN/ISO: G451, option)

Notes on various calibration methods

Rough optimization during commissioning after entering
approximate dimensions.
Number of measuring points between 1 and 2
Angular step of the rotary axes: Approx. 90°
Fine optimization over the entire range of traverse
Number of measuring points between 3 and 6
The start and end angles should cover the largest possible
traverse range of the rotary axes.
Position the calibration sphere on the machine table so that
on rotary table axes there is a large measuring circle, or so
that on swivel head axes the measurement can be made at
a representative position (e.g. in the center of the traverse
range).
Optimization of a specific rotary axis position
Number of measuring points between 2 and 3
The measurements are made near the rotary axis angle at
which the workpiece is to be machined.
Position the calibration sphere on the machine table for
calibration at the position subsequently intended for
machining.
Inspecting the machine accuracy
Number of measuring points between 4 and 8
The start and end angles should cover the largest possible
traverse range of the rotary axes.
Determination of the rotary axis backlash
Number of measuring points between 8 and 12
The start and end angles should cover the largest possible
traverse range of the rotary axes.
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TNC 620 | User's Manual Cycle Programming | 3/2014