Siemens SINUMERIK 840D sl Function Manual page 419

Time constant too low
When the compensation time constant settings are too low, radius deviations are
compensated briefly at quadrant transitions during circularity testing, but are followed
immediately again by greater radius deviations from the programmed radius.
Figure 5-24
Extended Functions
Function Manual, 03/2009, 6FC5397-1BP10-4BA0
Compensation time constant too small
Friction compensation (quadrant error compensation)
Compensations (K3)
419