The problem is that most of the time the ticket has actually printed, it's just failed to drop into the collection hopper. So unless you figure out a way to count the number of tickets that have dropped there's no easy way to detect this fault.
Detecting whether an item has gone through a gap seems to be a problem the vending machine industry has already solved.
welcome to the railway - if it's not the wrong kind of 'waxing' on the blank tickets, it's the poorly designed equipment. How frustrating must it be for the commission based conductors, when their equipment doesn't last half a shift or indeed their machine constantly non issues? Will the TOC do anything? I doubt it as it, the TOC, can only gain from these issues, regardless of whether it's employee or the customer who is penalised..
I am not au fait with technology in that area but does the solution apply only to items over a minimum size/weight?
I think stamp vending machines, and for that matter cash machines, show that pieces of paper can be counted out reliably when desired. (Cost may be another matter.)
They do not also need to print anything.
The difference being that they print from a continuous roll, and deliver the stamps without cutting them, so it's fairly difficult for one stamp to get stuck in the machinery.Stamp vending machines, of the type found in major city centre post offices, do print the postage etc. onto a sticker.
No argument from me on that one. There might need to be different procedures for TOD collections that have failed as opposed to purchases.OK, then...if it's accepted that the machines sometimes fail, there needs to be a better way of handling that - a clear procedure shown on the machine, and presumption in favour of the customer.
Detecting whether an item has gone through a gap seems to be a problem the vending machine industry has already solved.
It's not difficult, but it does add an extra maintenance item for servicing because a failed sensor could stop the successful issuing of tickets, but at least it's a fail safe. If it fails, the customer isn't left with only a partial delivery of tickets.