The original
mechanical machine was slow,
inflexible, and uneconomic. The cam design
was ‘
progressive’, i.e. each index was slightly
too big -
after 20 counts the photocell would detect
the misalignment and brake the system, using
clutch
and motion compensator to absorb the next
index. Also, there was also no facility to
change
packet size or tolerances without engineering
work.
In short, the customer wanted a machine that
would:
- be more efficient
- easier to use
- allow products to be changed
quickly
- reduce the number of lost indexes
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