Siemens SINUMERIK 840D sl Function Manual page 431

Case 3:
Coarse quantization > 1; fine quantization > 1; "Detailed learning" active (its use is only
recommended for very high precision requirements):
With "Detailed learning", learning occurs both at the interpolation points of the coarse
quantization and of the fine quantization.
The learning duration is therefore much longer.
The diagram below shows a severely fluctuating characteristic curve on which the effect of
selecting and deselecting the "Detailed learning" function is clear.
Figure 5-29
Extended Functions
Function Manual, 03/2009, 6FC5397-1BP10-4BA0
Effect of fine quantization with "Detailed learning" = active
Compensations (K3)
Neural quadrant error compensation
431