The Free Stroke Analyser is a tool for the measurement of dynamic ram alignment,
tool-pack or die alignment and dome station alignment. It can also be used as a static
It is very easy to use - each measurement takes about one minute to complete and
is carried out by putting the gauge ring in the tool-pack and running the bodymaker.
This is generally done without making cans, in order to measure the natural path
of the ram. (It is also possible to make measurements whilst making cans, which can
give additional information).
As well as ram alignment, tool-pack alignment and dome station alignment, the gauge
also provides other valuable data, such as ram vibration and the drift in alignment
between the first few strokes and the steady state condition.
Dynamic measurements often reveal substantial misalignment, even on bodymakers that
have good static alignment. The Free Stroke Analyser is therefore a very useful tool
for improving ‘real’ bodymaker alignment. Problem bodymakers can be quickly identified
and maintenance can be more targeted. An ‘Expert System’ within the software suggests
possible causes of any alignment problems that are detected and so helps maintenance
work to become more effective. The end result is bodymakers that run better.
Many can plants worldwide are already seeing the benefits, as are development teams
within some can manufacturers and coil suppliers.
· More effective maintenance
· Less downtime
· Less spoilage (e.g. split domes)
· Tooling life
· Can quality
· Light-weighting programs
· Increasing line speed
The results of a dynamic alignment measurement are given graphically as shown above.
The 3 graphs on the left of the display show the alignment of the punch sleeve to
the tool-pack on the forward stroke. The 3 graphs in the centre show the dome station
alignment, which is calculated from the ram defection as the punch enters the dome
station. The graphs on the right show the alignment on the return stroke where ram
vibration caused by dome station misalignment can be clearly seen.
Calibration of the Free Stroke Analyser gauge ring is straightforward and precise.
The Calibration Cradle, which is included with the equipment, is designed to hold
customers actual punch sleeves.