Control Eng. With apologies for the delay responding :
We've decided not to progress the sensor investigations as we're very content with how things are running now with the Fan Fold, and we have now worked out that there is enough 'give' on the roller to tear off consistently, so we always start at the same place.
However, we are also looking at rolls of paper and we are to trial that too. It may be that we need to look at a printer with a cutter. The rolls of paper are far cheaper (Approx £0.02, compared to £0.07 for fan fold). Given we probably use around 50,000 strips per year its worth looking at.
I'm also trying to progess the ideas of PPRs that come from our website being auto printed. The website generates an email which flows to an Outlook email client, so I am looking at a macro to pull the data from there and output to the strip printer with no mannual intervention - still working on that !!
Thanks again