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Chapter 1 - Introduction and Theory of Operation
INTRODUCTION
THEORY OF OPERATION
IMPAX can assist the operator of a forming, threadrolling or metal stamping machine by
counting parts produced, and monitoring stroke to stroke consistency. It is capable of stopping
the machine instantly when the job is completed or when it detects a problem.
IMPAX prevents smashups, scrap production, and overruns, thus making the forming operation
more productive and making the operator’s job easier. Because it is merely a tool, it cannot
replace skilled people, but it can help by reducing the drudgery of frequent inspections and
repairs.
Operation of the machine is not changed by the addition of IMPAX. IMPAX is ‘smart’ enough
to simply do its job, without interference or complication.
Although IMPAX operates mainly without attention, it does require the machine operator to
push a button once in a while. To get the best results from the system, you should become
familiar with its operation.
Operator attitude is very important when introducing and implementing IMPAX. Like any other
tool, its effectiveness depends on how well it is used. If machine operators perceive it as
unnecessary, complicated, an invasion of their routine, or a threat to their jobs, it will not work
even if it is technically perfect. It is vital that everyone understand that IMPAX can make
forming operations easier and more productive; that makes the whole company more
competitive, which in turn makes everyone’s job more secure.
The IMPAX monitoring system measures and remembers the forming force generated in each
forming station, for every machine stroke. The principle of operation is simply that when the
forming process changes (due to tool breakage, material variation, machine problems, etc.) The
forces required to form the part also change. IMPAX can be set up to detect a variety of changes
and stop the machine before further damage or waste occurs.
The heart of this system is the force measurement. Attached behind each forming station is a
piezoelectric force sensor. The piezoelectric element generates a voltage each time a part is
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