Application Examples ASDA Series Application Note
3-84 March, 2015
3.6.2.1 Master axis (Film feeding axis)
This axis is for delivering the film for packing. The delivery should be smooth, e.g. the
mechanical tension should not be too big or it might extend the length of film. However, if the
tension is loose, the film feeding bobbin would slip easily. The above two situations would cause
the problem that the pulse number sent by master axis does not consist with the length of film.
Although the error could be corrected by ASDA-A2, a smoothing film delivery is still a vital task
for packing machine.
3.6.2.2 Camshaft (Flying shear)
The design of flying shear should consider the proportion of actual cutting length and flying shear
spacing. The disproportion would cause the dramatic speed change while cutting and might
become the bottleneck of improving the productivity. Take Figure 3.6.2 as the example, for the
same length of cutting within the same time, the distance the single cutter travels is two times of
two cutters (the distance between tools). If the required cutting distance is short, single cutter is
easier to reach the limit (acceleration / deceleration limit and torque limit) than two cutters. This is
because the single cutter needs to travel longer distance for a cycle. With the same speed, it
needs a faster acceleration and deceleration. Thus, this issue should be taken into consideration
when designing the mechanical structure. Using ASDA-A2 to control flying shear, camshaft
would have the mark tracking function. Please see later parts for further details.
Figure 3.6.2 The comparison of cutting travel distance
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