Technical data

Operating Manual for AViTEQ Small Conveyor Units KF and KR

7–3

Sub-critical operation by increasing the working weight: the vibration width

increases (eigenfrequency fe > drive frequency fa). AViTEQ small conveyor

units are tuned subcritically such that the vibration behaviour is very stable

and insensitive against attenuation. The eigenfrequency is at least 5 Hz above

the drive frequency.

Super-critical operation by increasing the working weight: the vibration width

decreases (eigenfrequency fe < drive frequency fa). The vibration width and

hence the throughput are subject to larger variations. The power consump-

tion is higher.

7.3 Tuning data for the KF and KR series

Before delivery, small conveyor units without working units are factory-tuned for a

specified weight that is printed as „Nutzg.“ on the type label.

If the user installs a lower working weight, additional weights must be atta-

ched to the drive's support plate until the combined mass reaches the given

tuning weight.

If a heavier working weight is used, the original distance from the resonance

frequency must be restored by changing the leaf spring arrangement. For this

purpose, measurements of eigenfrequency, current consumption, vibration

width, and stopper voltage are required:

You change this... ...and get the following result:

increase the working weight eigenfrequency decreases

decrease the working weight eigenfrequency increases

increase the distance from the

resonance frequency

vibration width decreases

decrease the distance from the

resonance frequency

vibration width increases (stopper!)

increase air gap width current consumption increases (see type label for maxi-

mum value), vibration width decreases, stopper voltage

increases

decrease air gap width current consumption decreases, pulling force and vibra-

tion width increase, stopper voltage decreases (stopper-

to-stopper operation!)

more or thicker leaf springs eigenfrequency increases, see distance from resonance

frequency

fewer or thinner leaf springs eigenfrequency decreases

Table 7.1 Effect of tuning changes