What is this sound on unused mk3s
I noticed this sound as I was removing the straps from my brand new mk3s. Before emailing support I thought I'd ask here. New to this so not sure if I embedded the video correctly.
RE: What is this sound on unused mk3s
Sounds like an extra, unused pair of square M5 nuts sliding in the notches of the horizontal black support beams. If so, they may be helpful at some point in time to attach things to it like camera carriers, cable supports etc.
I try to give answers to the best of my ability, but I am not a 3D printing pro by any means, and anything you do you do at your own risk. BTW: I have no food for…
RE: What is this sound on unused mk3s
@just3d
Ah! I had 2 m3x14 (?) in the bottom of the box when I lifted it out - 2 just sitting there. I was concerned but looked everywhere for missing bolts - everything seems buttoned up but I'm still concerned about where they should be. I tilted it and shook it slightly but nothing drops out. Do I have to remove the ends to get them out? If so, will likely leave as-is.
RE: What is this sound on unused mk3s
IIRC the only place those T nuts are used are in the PSU. Make sure yours is still mounted as per step 28:
https://manual.prusa3d.com/Guide/7.+Heatbed++&+PSU+assembly+(Black+PSU)/1153?lang=en#s20826
RE: What is this sound on unused mk3s
That´s the nuts I meant. If it is in fact the mounting of the PSU, mount the PSU, enjoy printing and do report the issue to Prusa via chat on their site so they know they have an issue. If they appear to be unnecessary, which seems far more likely, it will technically still be an assembly error but one which does not do harm at all, just leave them in place. Probably someone added two nuts early in the assembly process, later turned the beam, did not find the nuts and added two more. I would not recommend to open the ends to remove them, as the frame structure is to be aligned thoroughly during assembly and opening the ends may ruin that alignment, causing consequential failures at the alignment of the bed´s bearing rods etc. No need for that. Should the nuts rattle when running the printer, put a piece of tape or similar to them and leave them in place. When I built our second i3MK3s I added some extra nuts for later mounting of lights, camera ... you name it.
I try to give answers to the best of my ability, but I am not a 3D printing pro by any means, and anything you do you do at your own risk. BTW: I have no food for…
RE: What is this sound on unused mk3s
Thanks for the link to the assembly instructions. That has to be it. I bought it assembled (and I'm not going to take it apart to prove it) but that's exactly what those should sound like. w/o the link, I didn't have any idea what it could have been and wouldn't know where to look in the instructions. I really appreciate the help and can sleep knowing nothings missing.
RE: What is this sound on unused mk3s
Just to clarify, you checked your PSU is mounted correctly and you are in fact hearing extra nuts sliding around, right?
If not, your frame will have some flex to it (since the PSU is a structural component) which could impact print quality.
RE: What is this sound on unused mk3s
It was the PSU t-nuts. Thanks for all the help everyone