The machine comprises in combination: a winding cradle (7); an insertion
member (29) to insert winding cores (A, A1) into said cradle; an ejector
(39) to eject the logs formed from said cradle (7) causing them to roll
on an unloading chute (41); a severing device (55, 53) to sever the web
material after ejection of the log from said cradle. Disposed along the
unloading chute is an aperture (43) elongated in a direction transverse
to the direction in which the log is unloaded along said unloading chute.
Moreover, the severing device (53, 55) includes a movable element (55)
that is inserted into said aperture (43) to cause severing of the web
material between the cradle and the finished log.