Parker NX Series, Техническое руководство

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70 - PVD 3663_GB_NX_March 2017.Docx
3.4.2. Frame recommendation
Warning : The user has the entire responsibility to design and prepare
the support, the coupling device, shaft line alignment, and shaft line
balancing.
Foundation must be even, sufficiently rigid and shall be dimensioned in order to avoid
vibrations due to resonances.
The servomotors need a rigid support, machined and of good quality.
The maximum flatness of the support has to be lower than 0.05mm.
The motor vibration magnitudes in rms value are in accordance with IEC 60034-14
–
grade A:

maximum rms vibration velocity for NX is 1.3mm/s for rigid mounting
Warning : A grade A motor (according to IEC 60034-14) well-
balanced, may exhibit large vibrations when installed in-situ arising
from various causes, such as unsuitable foundations, reaction of the
driven motor, current ripple from the power supply, etc.
Vibration may also be caused by driving elements with a natural
oscillation frequency very close to the excitation due to the small
residual unbalance of the rotating masses of the motor.
In such cases, checks should be carried out not only on the machine,
but also on each element of the installation. (See ISO 10816-3).
Warning : A bad setting of the electronic control of the close loop
(gain too high, incorrect filtring …) can occur an instability of the shaft
line, vibration or/and breakdown - . Please consult us