filament runout question(s)

This question applies to Robo filament spools specifically. The filament at the end of the spool is bent and plugged through a hole in the spool. When the filament runs out will the gear generally be strong enough to straighten the bent part and pull it off the spool and also through the filament senor panel (and possibly the beginning of theTeflon tube depending on where the sensor trips) without effecting the pressure in the nozzle or grinding the filament? So far I have always just manually removed and cut off the bent part when the spool starts to get low but this requires me to be present at that time.

Also, when the print pauses after tripping filament runout how long can it safely stay in that state? Could I go to bed knowing the filament will run out in the middle of the night and then replace the filament the next morning without disrupting the integrity of the print or damaging the printer?

 

@WheresWaldo Thanks for the feedback. Is there a procedure or workaround you have used to avoid this problem somehow? It kinds of defeats the purpose of having the runout sensor if you have to be there when it runs out anyways.

 

Using Hatchbox PLA, I generally see the end of the filament not separating from the spool about one time in three. I've had the thing run out after I've left for work and had it sit there waiting for me for a half a day. But, on one occasion, I was a little rough (or something) when I threaded the new spool and ended up ruining the print with a layer shift at the filament change.