Ultimaker Original Under Extrusion Problem

[MacNite 0]

Hey Guys,

I am having severe under extrusion issues with my Ultimaker Original with heated bed and dual extruder upgrade and I don't find a reason for them. I bought the printer used and at the beginning it did not have these issues. I am having the under extrusion issue on both extruders. I am using original Ultimaker PLA, I have only one spool left, new material will arive tomorrow.

I would say it started since I upgraded to the latest firmware version but I am not sure if that's the reason or if it's just assuming it, because it was in the same time frame.

What did I do to find the problem:

- increased and decreased the hotend temperature (190°C to 210°C)

- check the tension of the extruder spring

- clean the knurled bolt

- changed knurled bolt between extruders

- change the bowden tube

- check the couplers

- check steps/mm settings - they are @836 steps/mm right now

While checking the couplers I found two washers (one on each hotend) between the wooden part and the coupler (see picture). I removed these because I could not find these in the assembly instructions.

Any suggestions how I should proceed?

Greets

Max

[MacNite 0]

Found the problem. The original Ultimaker Filament was just rubbish. Although it was an old roll.

The Filament diameter varied between 2..7mm and 3.3 mm. Just got a few new rolls of DasFilament PETG and PLA and the printer works like a charm.