Siemens SINUMERIK 840C - Manual (Page 896)

06.93 12 Functional Descriptions
12.16.3 Installation
Figure 3 Radius deviations at the quadrant crossover points with insufficient compensation
II
IV
I
Counter 1
Counter 2
III
If the compensating amplitude is too high, the circularity test clearly shows the
overcompensation of the radius deviations at the quadrant crossover points (see Figure 4).
Figure 4 Compensating amplitude too high
II
IV
I
Counter 1
Counter 2
III
Setting the compensation time constant
If the compensation time constant used in the circularity test is too small, the test shows that
the radius deviation is compensated for a short time at the quadrant transition points but that
larger radius deviations from the programmed radius again occur immediately after (see
Figure 5).
© Siemens AG 1992 All Rights Reserved 6FC5197- AA50 12–121
SINUMERIK 840C (IA)