So I've been blaming a bad bearing for this noise.

3D Printing
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So I’ve been blaming a bad bearing for this noise. I figured it had to be it because when the bad bearing seized it broke my Y carriage bearing clamp. Yesterday I printed a new carriage in limp mode and tore the thing apart and threw it back together. For the first 5 mins it sounded nice (i even have video to prove it) I was feeling accomplished so I started a print. The noise is back almost immediately. All I can figure is it seems to come from the bed.

This noise carries , the lady next door doesn’t like it when I print at night and clearly if Y worked like X does I could.

This is what I am trying to achieve during prints.
http://www.youtube.com/watch?v=8nqQ0pGQiww&feature=youtu.be

This Highlights what the ‘problem’ is . About 8 seconds you see X go into action. It makes a nice whip whip whip whip noise. At 12 seconds the joy killing noise kicks in . It is more of a ZZZZZZZZZT .
http://www.youtube.com/watch?v=gqRifVq486c&feature=youtu.be

Ive tried to track down and nuts in the beams that are not secure.
Ive replaced ALL the bearings twice.
Ive replaced the idler bearing.
http://www.youtube.com/watch?v=8nqQ0pGQiww

2

Initial reports seem to indicate Ive got mine running considerably quieter than an identical printer. I think this is the best i can do ?

3

well i’m doing a repstrap (and a big one at 42 cubic inches ) and most of the time it gets noisy if i either dont calibrate the current for a given stepper properly or if i have crap on my rods (smooth and threads)

4

I think I just found it. The tensioner uses screws to force the idler out. Where those screws contact the openbeam was all torn up (scratches and things) I stuck some rubber feet on the openbeam where it contacts, and the rattle is gone. It still hums but considerably quieter than an identical printer. so i think i got it.