Cannot for the love of god quiet this thing down
I have horrible buzzing resonance in my brand new 2T coming out of the rails amplified by the tool heads.
Video: https://youtube.com/shorts/W_4DElEIAVw
Things I've tried:
Printing and assembling the dwarf board cover out of TPU
Printing and assembling the dwarf board cover door out of TPU
Printing and assembling the print fan bracket out of TPU
Printing and mounting vibration dampeners to the side and bottom panels
Completely running the tool naked
Calibrating phase stepping
Printing with stealth mode enabled
The sound gets muted if I squeeze the tool head hard. It's driving me crazy.
To rule out resonance coupling from the table/printer combination temporarily move the printer to a different bench - or the floor, and see if the problem persists.
Cheerio,
RE: Cannot for the love of god quiet this thing down
I added these sound dampeners:
The bottom panel dampener had by far the biggest effect; I added felt pads to the points where it contacts the sheet metal. This alone cured my dog freaking out anytime I ran a print.
The side panel dampeners made less of a difference, but still noticeable.
ken
RE: Cannot for the love of god quiet this thing down
This XL user found that in his printer's tool heads, the cooling fan and the cover of the Dwarf PCB were rattling. Adding damping materials to those removed the resonances. (You can still hear the stepper motors of course, but that's a less maddening sound.)
RE: Cannot for the love of god quiet this thing down
I've already printed and installed both of those. Made no difference
I added these sound dampeners:
The bottom panel dampener had by far the biggest effect; I added felt pads to the points where it contacts the sheet metal. This alone cured my dog freaking out anytime I ran a print.
The side panel dampeners made less of a difference, but still noticeable.
ken
RE: Cannot for the love of god quiet this thing down
Yeah that video was one of the first things I've found online about this. I talked with him also. I've also stripped the toolhead completely to no avail. Like I've said I printed parts he was saying caused the issue out of tpu, which again made no difference.
Needless to say I gave up at this point. My machine, although brand new, is manufactured in April '24 so I also needed to modify the main cable to '25 specs. I'm getting a 2t > 5t upgrade. And if the tools Prusa sends me are free of this issue, I'll just use two them as tool 1 and 2
This XL user found that in his printer's tool heads, the cooling fan and the cover of the Dwarf PCB were rattling. Adding damping materials to those removed the resonances. (You can still hear the stepper motors of course, but that's a less maddening sound.)
RE:
I have now printed all tool parts with TPU. Recalibrated input shaping (was giving me a belt too loose error so I tightened them both 1 turn). Recalibrated phase stepping and now it is even LOUDER !
I don't know what to do at this point. Can't stand this noise. Should I try replacing the motors?
RE: Cannot for the love of god quiet this thing down
Ok I solved it. The problem is firmware.
Since I got my 2t fairly recently I immediately flashed 6.4.0 and used it with this firmware exclusively. Since I use 6.4 without any problems on my Core One I never thought the problem could be firmware related.
The XL is now dead silent. It is a night/day difference. There is something definitely wrong with the 6.4.0+11974
RE: Cannot for the love of god quiet this thing down
Good information, thank you! Another reason to stay away from 6.4.0...
RE: Cannot for the love of god quiet this thing down
I forgot to mention I am now using 6.2.6 on the XL without any problems
RE: Cannot for the love of god quiet this thing down
I also have a 2 toolhead XL, and had a bad screaming noise coming out of my toolheads, that gradually built up after going to 6.4.0, I ended up replacing all the rails and pulleys with Prusa support's help. It never occured to us that it could be a firmware issue.
I had done a full format and recalibrated everything multiple times on 6.4.0, none of which helped. Only after downgrading to 6.2.6, the Prusa is nearly silent again.
This is too bad though, because 6.4.0 did fix a random tool crash issue.
I've attached videos as examples, I'll probably post this on another forum discussion with a similar issue as well. I have no idea why the firmware would cause a rattling/buzzing/screaming noise in the toolheads.
https://photos.app.goo.gl/hUp3ibe88H68aZ8h8
RE: Cannot for the love of god quiet this thing down
I think the firmware is so buggy that the algorithm, instead of reducing vibrations, actually amplifies them somehow.
Another important prerequisite for this is that initial calibration must be made at 6.4.0. I haven't tried it yet but it may not occur if the initial calibration was made in a prior firmware version. That would explain why some people say that they don't experience this issue.
These are my theories though, I'm not a software engineer.
What's baffling me is that Prusa is still silent on this. No acknowledgement at all. Are they not sure? That's why you are misled on replacing the hardware in a software issue.
RE: Cannot for the love of god quiet this thing down
Glad you figured it out. That definitely sounded like the printers did before phase stepping.
RE: Cannot for the love of god quiet this thing down
Yesterday I tried 6.4.0 again.
I, of course, made my phase stepping/input shaping calibrations using 6.2.6 and DID NOT TOUCH them after updating to 6.4.0.
I only had to calibrate homing again after updating to 6.4.0 and now everything seems to work OK.
No issues (and/or acknowledgement from Prusa) so far