(57) A method to control a feeding unit (1) to feed components (2) for smoking articles.
The feeding unit (1) has: a first feed (3) containing a first mass of components (2),
a second feed (4) containing a second mass of components (2), a first drum (24), which
is provided with seats (27) receiving the components (2) from the first feed (3),
a second drum (25), which is provided with seats (29) receiving the components (2)
from the second feed (4), and a third drum (5), which is provided with seats (7) receiving
the components (2) from the first drum (24) and from the second drum (25). The control
method, in case of regular operation of both feeds (3, 4), entails the steps of: configuring
the first drum (24) and the second drum (25) according to a normal configuration,
which entails a normal pitch (P2) between the corresponding seats (27, 29); and transferring
the components (2) from the first drum (24) into half the seats (7) of the third drum
(5) and the components (2) from the second drum (25) into the remaining half the seats
(7) of the third drum (5). The control method, in case the first feed (3) stops, entails
the step of: configuring the second drum (25) according to a special configuration,
which entails, between the seats (29) of the second drum (25) a special pitch (PI),
which half the normal pitch (P2); and transferring the components (2) from the second
drum (25) into all the seats (7) of the third drum (5) .
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