Second print issues - Z axis banding

[ChrisInNewark 0]

So I saved up and I bought myself a nice new, shiny UM2. After printing the customary robot as my first print I decided to try and print something for my other 3D printer, namely a filament oiler. As you can see from the picture it started out printing fine but then, as it got taller, I started to get these bands/grooves/artifacts (call them what you will) where the layers haven't quite fussed properly (as well as stringing on the inside of the oiler). Can anyone tell me what the likely cause of these are and more importantly how to fix them?

I printed the part at the standard 210 degree for PLA and the default speed of 50mm/s in Cura however I reduced the speed to 80% on the printer when I started to see the bands.

Thanks in advance,

Chris

[DidierKlein 729]

This is called underextrusion it can be caused by many things

You can read this if you want more information on what it is and possible causes

[ChrisInNewark 0]

This is called underextrusion it can be caused by many things

You can read this if you want more information on what it is and possible causes

 

Bloody typical that I get the problem that doesn't have a straight forward solution. Lol. Thanks for the response though, that link made for some very interesting reading.

[DidierKlein 729]

We can work together to solve your problem if you don't find an obvious solution from the link.

First thing i have to ask, the filament is it ultra marine blue from colorfabb? I've had some issues with that color

Check your nozzle and clean it with the atomic method, it's the most common cause

[ChrisInNewark 0]

We can work together to solve your problem if you don't find an obvious solution from the link.

First thing i have to ask, the filament is it ultra marine blue from colorfabb? I've had some issues with that color

Check your nozzle and clean it with the atomic method, it's the most common cause

 

The filament was the one supplied with machine. This was only my second print.

[stu_le_brew 42]

firstly welcome to the forum

It will help with the diagnosis of the problem if you post the parameters settings from CURA, which mode are you using I would guess you are using 'Quick Print' but you may be dabling already with Expert settings ?