cheers mate
Lecturer suggested that the data collected ie; amount of pressure dropped and time pressure took to drop, and used to identify sealing problems early to prevent packs failing....so graphs showing increase in pressure over time for last 5 packs tested etc.
I think he was a bit narked I have any design at all at this stage..he has asked me to go back and look at alternatives just to reject for whatever reason, just so I look like I have thought of alternatives (typical me always the one to go about it the wrong way lol)
I am going to investigate components and start building the frame (and scavage the stores for parts to make my life easier, and I would like the basic machine finished early so I can develop it fully in no rush
Also...My PLC lecturer said that I could use this as my final project in my PLC module too (happy days, 2 birds 1 stone)