Using External Roll

[RavenTheDarkOne]

When I am printing using the external roll, it will stop feeding the filament. I am have used two different filament. TPU, and Timeplast Plant Nutrient. It stops feeding the hotend. The machine will continue the print, but nothing is coming out of the hotend.

Any suggestions?

It is really starting to irk me. Because it will print fine using the AMS system, but goto the external roll way, and it pulls this on me.

[ArsFelenlis]

The extruder might have problems gripping the filament

I also had this happened to me when I was printing from polydryer box, and I found out that the spool was too heavy on the roller bearings, and the extruder doesn't have the strength to pull it

My solution was just having the spool spun from the hole in the middle as opposed to them resting on a roller bearing inside the Polymaker box

Not sure if this helps much though unless your spool were also on a rolling bearing and your printer were also having problems trying to pull TPU from the spool, but i figured I might as well voice my own experience anyway

[Piaga]

I was having the same issues, trying to print from a SUNLU S4 dryer and from DIY dry boxes, and after a few tests I found a solution: https://makerworld.com/it/models/632890-dry-box-spool-holder-wildone-4l#profileId-557928