Parker Hannifin S.p.A. - Divisione S.B.C. “SPD” User’s Manual
66
The optimal value of Pr17 will be attained with a response of the system as shown in figure 4
below:
Fig. 4
An overshoot of about 10% must be obtained. It is important that after the overshoot, an
undershoot does not occur.
Once the optimal value of Pr17 has been established, we must analyse the movement of the
axis. If it moves without vibrations and acoustic noise, the adjustment of the system is
complete. .
In some applications it is possible to reduce acoustic noise by using a higher value of Pr18.
Figure 5 shows that once the optimal adjustment has been achieved, there is also an
oscillation of the current that can produce acoustic noise and mechanical vibration. By raising
the value of Pr18 to 9, the situation is much improved (fig. 6).
Fig. 5
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