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R05.0
Table
4:
Obligatory values for the working weight
Type
Ideal useful mass [kg]
Max. useful mass [kg]
HLF07-M
0,7 ± 0,05
0,9
HLF12-M
1,2 ± 0,05
1,5
HLF25-M
2,5 ± 0,1
3,0
HLF50-M
5,0 ± 0,1
5,5
NOTE
Useful and counter masses should correspond to the values
specified in Table
NOTE
1.
Masses are fully balanced if hardly any vibrations are no-
ticeable in the floor.
2.
When masses are fully balanced, the transport speeds at
useful and counter sides are identical.
4.3
Fine adjustment of natural frequency
The Afag Linear Feeder is a spring/weight based vibrating system that operates by mak-
ing use of resonance. Weights that are not exactly balanced require a spring stiffness
modification. Movable adjustment plates are provided at the base plate attachment of the
spring assemblies (see Figure 7). The natural frequency can be adjusted by moving
these adjustment plates.
Figure 7:
Spring assembly with adjustment plates
The Linear Feeder always has to be adjusted ‘subcritically’, i.e. the inducing frequency
has to be about 5% less than the natural frequency. This means that a natural frequency
of about 97Hz is required for a 100Hz feeder, and a natural frequency of about 117Hz is
required for a 120Hz feeder.
Adjustment plates
Adjustment plates
