Printing fails - no material is deposited

[Pro-Plan 0]

After changing Filament from PLA to ABS everything was ok. But after changing back from ABS to PLA printing failed. At first, still some material came out of the nozzel producing a cobweb type formation only. Then no material at all was printed. After cleaning the nozzel (atomic-methode) the nozzel seem to be clean, but still no material is deposited. We noticed a deep groove in the filament at the position of the filament feeder.

We are looking Forward to get your Support.

Kind regards

[DidierKlein 729]

Clean up the nozzle several times with the atomic method.

Also if you try printing and nothing comes out, the filament is grinded in the feeder, when you try again, take the filament out and cut everything that was in the bowden to prevent the filament from blocking inside the tube (when grinded it will be more wide than it's supposed to be)