Original Prusa i3 MK2S is a successor to Original Prusa i3 MK2 with small hardware tweaks for easier assembly and improved reliability.

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Anyone found that their extruder cover/body is loose?

Guys, I was excited for my MK2S to arrive after ordering it months and months ago. It was on backorder but I did not cancel my order as I was very excited and wanted to support Joseph Prusa.

Well I finally received my kit a few weeks ago and I finally got around to assembling it last night. Everything went well until......... when I printed the batman print that was on the SD card. It got caught somehow in the PLA stuff that was already printed on the heatbed and then dug into my bed. I quickly turned off the printer. I found that the extruder slightly loose/wobbles. I think it caught whatever was printed after it had wobbled and the wobble caused it to slightly stick out causing it to scratch the bed.

I then disassembled to check the extruder cover to see if anything was not tightened but all looked okay. I then put it back again but this time without running the printer, I used my finger and I still find that the extruder does not sit firmly inside the printed extruder cover. It can spin slightly or even wobble it.

I opened a support case last night and they want me to disassemble everything (which I will do) and take a video for them to show them what I am talking about before they are able to send out replacement parts. i think my heat bed might have possibly damaged due to this but hopefully its just the PEI film that got damaged. I am very sad that I will have to wait a while before I can get replacement parts since I live in the US. I don't know if the extruder cover is out of spec slightly to cause this. Anyone else notice the same issue? Is it normal to have the extruder slightly move/wobble???

On top of running out of the gummy bears they sent, I am very sad and disappointed at the moment of not being able to print anything :(

Update (09/13/2017)

Block Image

Here is the damage image to the heatbed

Answer this question I have this problem too

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Hi LP007,

I will discuss this with our technician and let you know, how to solve it. The hotend must be "sitting tight" inside the Extruder body, otherwise, the print quality will be affected.

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Hi Jakub, thank you! I have opened a support ticket with prusa. The print quality looked okay until it dug into my bed and damaged the heated bed. See picture. As soon as I disassemble the extruder case, i will record video and send it to support so I can get replacement parts. I am very sad I can't print anything yet. I think what caused the damage was the extruder case since it sits loose inside. That is the only thing I can think of. [image|10436]


Jakub did you find a fix? I have the same issue.



I ended up ordering another extruder case which fit fine. Unfortunately I did not bother going back and fourth with prusa as to get a refund. So I ate the cost :(


Bugger. Was hoping I wouldn't have to wait weeks to fix it :(


Hi Nic, can you upload video of yours? Lets have a look at it ;)


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LP007 will be eternally grateful.
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