Nozzle blocked? Please help

[DaveCatt 4]

Hi, I am not having much success solving a problem I am having when printing with the UM3. The printer stopped extruding early in a print, during the first or second layer, please see attached images. The images of the PETG prints were taken on a piece of paper as they were not visible on the glass.

 

The issue first started when I was printing with PETG, see Images 1A&1B, after cleaning the print core and manually feeding filament through the nozzle I tried again to print PETG, same issue, see Image 2. After cleaning the nozzle and the feeder I decided to try PLA, once again this issued happened, see Image 3.

 

On every occasion the feeder ground the filament, see Image 5, and I could not get the UM3 to unload the filament, the nozzle end swelled up due to pressure see 4mage 4.

 

An image of the print core (left) is attached, see image 6.

 

These are the setting for both filament. these have worked well in the past.

 

Printing PETG

Bed Temp - 70°C

Nozzle Temp - 245°C

 

Printing PLA

Bed Temp - 60°C

Nozzle Temp - 206°

 

The feeder is set to the middle mark.

 

Any suggestions would be appreciated.

 

Regards