13
N12- G & HW Series Frequency Controllers 115/230VAC
Setting Instructions
(cont.)
Regulation Mode
Instruction for Regulation Mode
• An accelerometer e.g. SW11 must be fitted to the
vibratory feeder in order to run in regulation mode.
The accelerometer should have a frequency range
corresponding to that of the feeder.
• All vibratory signals, that are picked up by
the accelerometer, are used by the regulator
circuit. Stray signals generated by neighboring
machinery, a flimsy accelerometer mounting, or
an unstable support frame, can cause incorrect
regulation to occur. It is especially important to
ensure that there are no external influences
of this type during the automatic frequency
search routine.
• Resonant frequencies: It is possible to have
several vibrating frequencies, where resonance
occurs, depending on the springing and masses
of the system. The additional resonant points are
at multiples of the dominant resonant frequency.
Under extreme circumstances, the automatic
frequency search may be unable to differentiate
between these frequencies and so in these
instances, the frequency must be set manually.
