Right. Roll fed small thermal printer. Output is desired to be tightly rolled.
I think it’s a fairly straight forward challenge. Slit a dowel. Maybe PVC pipe. Whatever. Have that turned by a motor. Little DC motor should be fine.
How to make it know to turn..?
Easiest way would be (wire?) switches that would trigger whenever the output buckled. Not very exact, and fragile due to the potential to knock the switch out of position.
-more later-
Peter's stuff.