Hi Mary,
we had a similar problem during a tradeshow. We are traveling a lot with the machines.
What you need to do is really a pain, but you need to clean the whole glue system properly, otherwise you will have left som dried glue, beeing a place , more glue will get cured. And you will get some particles clogging your gluewheel.
You can do 2 things:
1st: Call the reseller/servicepartner near you and let them take care of it, you will not void you warrenty, if you have some. They are trained to do this! (RECOMMENDED!)
2nd: You can do it yourself, if you have some mechanical knowledge.
-So turn of the printer and remove all the covers to have more room
-take of the glue-tank by loosing all the screws.
-unconnect all the glue hoses, the switch and put all of them in warm water and rinse them. Best thing is to buy some new hoses and renew them.
-take apart the glue wheel and also rinse everything in warm water making sure, no old glue is in the system. Make sure to test all things if they are clogged! (If you not sure how, you should call the service
-look at the glue you have left, if it exeeds the time of best use. maybe the glue itself is to old!
-set eveything, you got apart back together, connect all the hoses put new glue into the system. Now you have to check if all is tight (you will first hear the sound of the pressure pump. This sound has to stop and not to get on all the time again. If you are loosing pressure and the airpump starts pumping again, you have a leak! Than you should call service!
I do not recommend this for you to do yourself! The glue mechanism is a very delicate thing! I would spend some money or claim the warrenty from the preowner!
(Oh I forgot 3rd: Pay me a plane-ticked and I will come from Germany and fix it for you
Best, regards! The Formicum Team