DIGIVEX Little Drive Servoamplifier
61
PVD 3530 GB 01/2005
6.1.3 Integration stoppage
See the previous paragraph for the function of this parameter. Below is its definition after the
Bode graphs only (gain / frequency and phase / frequency).
6.1.4 Speed scaling
The choice of motor - drive combination determines the maximum possible speed. The
"Maximum" speed parameter can be used to reduce this maximum speed for the application. This
parameter is external to the speed loop and modifying it does not modify gain.
The "Speed for 1 Volt" parameter determines the speed "gradient" (e.g. maximum speed can be
obtained for 10 V, 9 V or 7 V, depending on the positioning control).
6.1.5 Filtering frequency
Resonance phenomenon
Many systems have one or more resonance frequencies related most of the time to mechanical
phenomena: inertia or mass, associated with the rigidity of the mechanical components (belts,
screws, reducing gear, frames, etc.).
In a zone of reduced frequency around the resonance frequency, there occurs:
Marked variations in loop gain.
Marked variations in the closed loop phase.
This leads to instabilities or "squeaking", with more or less violent oscillation.
Gradient-2
Gradient-1
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