6.6 Circularity test
6.6.1
Circularity test: Function
The
circularity
test
serves to set and assess the dynamic response for interpolating axes and
to analyze the contour accuracy on the quadrant transitions (circular contours) achieved by
means of friction compensation.
The circularity test is used to check the interpolation of the axes which work together. This
function measures a circle with reference to the motor or to the direct measuring system.
Alignment of the machine-mechanical equipment is not taken into account in the result. This
gives the commissioning engineer the option of separating problems with the controller tuning
from mechanical problems.
The following axis machine data and parameters are checked with this procedure:
● MD32200, MD32400, MD32402, MD32410, MD32490, MD32500, MD32510, MD32520,
MD32540 MD32620, MD32640, MD32810, MD32900, MD32910, MD32930, MD32940
● p1421 bis p1426, p1400, p1433, p1434
The following position error compensations should be disabled if this procedure is carried out:
● MD32450 Backlash compensation
● MD32500 Friction compensation active
● MD32700 Encoder/lead error compensation
● MD32710 Enable sag compensation
● MD32750 Temperature compensation type
Note
MD32450
backlash
must
be
adjusted via an external device, such as a circularity test or gauge.
Example:
NC test program for the measurement of the X-Y axes:
FFWON
SOFT
G90 G01 F3000 X400 Y200 Z500
LAB:
G91 G64 G02 X0 Z0 I10
GOTOB LAB
M30
Position, feedrate and active plane must be adjusted to the machine!
Tuning
6.6 Circularity test
CNC commissioning
Commissioning Manual, 10/2015, 6FC5397-3DP40-5BA3 205
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