88 •Chapter 14 DB-28104 DMC-21x3 Accessories
Figure 44 AFX=10 Step Response
Close inspection of the step response shows that some overshoot occurred. However, any
attempt to eliminate this overshoot resulted in an overdamped system.
A second test was run with AFX=12. This highest interpolation requires that the system be
wired in such a way that noise is nearly eliminated. Even one or two bits of noise on the analog
signals can result in large disturbances in the position calculation. The same system with
AFX=12 resulted in the following gains:
KDX = 4.75
KPX = 2.0
KIX= 2.1
ILX= 9
ITX= 0
FAX= 0
FVX= 0
PLX= .2
Figure 7 shows the associated step response.
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