Filamentive rPETg spool catching/tangled

[dsmyth 0]

Hello all, 

wondering if anyone else has similar experience and/or solution. I am running a 500g print with a filamentive rPETg on an UM-s3 and approximately every couple of hours the print stops suggesting the spool is empty. In fact the material has become lightly “tangled” on the spool and won’t feed. The material is in the outer position and I have the guide in place. 
 

im not sure if this is specific to this spool of material, or the spool type (cardboard) etc. I haven’t experienced this with UM Materials.

 

would welcome thoughts and experience. 
Thanks 

Edited April 28, 2021 by dsmyth
Correction

[gr5 2,172]

It's hard to explain in words but the end of the filament can get caught under a loop on the spool.  At that point you have a "permanent" tangle that will keep moving around the spool.  Sometimes the printer is strong enough to just pull through it but often it can't.

 

The basic solution is to remove the spool from the back of the machine, unspool a few meters and while doing that you should be able to fully visualize the tangle and fix it by passing the spool through the loop.  Or if that's too mentally difficult, unload the filament and remove the tangle by passing the end of the filament back under the loop again and then reloading into the printer.

 

The way to keep this from ever happening again is to NEVER let the end of the filament go.  If you let go for 1/10th of a second it can sproing like a spring and jump under another loop without you noticing.

[dsmyth 0]

Thank you @gr5. Very logical. Thanks 

[geert_2 557]

If you see this tangling beginning while it is still printing, a temporary solution is sometimes to manually unwind and loosen up some filament, very carefully, without interrupting the printing. Then roll it up again and make sure it is still free, so you can continue printing for a few more hours. Repeat untill your print is completed, and then you can really handle it as described above. I have had to do that too, I think we all have...