Grindy patches on filament

[electronic_matt 0]

Recevied my UM2 a couple of days a go, totally new to all this 3D printing, had a problem with blocked nozzle to start with, managed to clear that, and seated the bowden tube firmly in to the print head so it does not move up and down, blue clip not really needed, printed the robot ok ish, and the ear ring file on the SD card, 210c, 60c bed, 50mm/s, any other settings I should note here?

Noticed some grindy looking patches on the filament as its moving along the bowden tube, I guess this is from the feeder at the back of the machine, and wondering why this is happening? my little white things on the feeder are at the top position

 

[gr5 2,069]

Having the feeder diamond pattern embedded into the filament is normal. Having bite like chunks removed is not. Which is it for you?

 

[electronic_matt 0]

The feeder is biting chucks in to the filament, look like half semicircles

[electronic_matt 0]

gr5 I thank you for replying, the printer seems ok now, printing all ok

Just a problem with one fan, it wasn't spinning, I touched it and it started spinning hmm