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Ultimaker Original Under Extrusion Problem

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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.

IMG_20170620_231424.thumb.jpg.398ce87644dc5fe492cbaca1d9341a48.jpg

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.

IMG_20170621_213754.thumb.jpg.0d285d9c42d5066e3e6fdbd09c6fb741.jpg

Any suggestions how I should proceed?

Greets

Max

IMG_20170620_231424.thumb.jpg.398ce87644dc5fe492cbaca1d9341a48.jpg

IMG_20170621_213754.thumb.jpg.0d285d9c42d5066e3e6fdbd09c6fb741.jpg

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