RE: Loud buzzing during movement
I think I might have the exact same problem. I've adjusted belt tension and tightened every screw I can reach after taking off the side and top panels. I emailed support yesterday but haven't heard back from them yet. Here's a video of mine: https://photos.app.goo.gl/dwmpuGdbMPLovo3B8
RE: Loud buzzing during movement
I think I might have the exact same problem. I've adjusted belt tension and tightened every screw I can reach after taking off the side and top panels. I emailed support yesterday but haven't heard back from them yet. Here's a video of mine: https://photos.app.goo.gl/dwmpuGdbMPLovo3B8
Yeah, that sounds similar or identical. After another round with support Prusa would like to have mine back for investigation and repair. I'm working through that process now.
RE: Loud buzzing during movement
I think I might have the exact same problem. I've adjusted belt tension and tightened every screw I can reach after taking off the side and top panels. I emailed support yesterday but haven't heard back from them yet. Here's a video of mine: https://photos.app.goo.gl/dwmpuGdbMPLovo3B8
Mine was very silent for a few weeks, now i tried to do a more ambitious belt tensioning and getting it more even between the sides and closer to the spec, and now it makes a little bit of that sound at some movements. Maybe I should just go back to having my belt tension all over the place, it actually printed slightly better and was more quite that way 😀
RE: Loud buzzing during movement
Make sure to not just get the end-stops hitting in sync with even belt tension, but also get/use a machinist square to make sure the X-axis is 90° to the Y-axis rods, when the belts are loose.
It should be the case, but if not, there might be quite some strain on the bearings etc.
RE: Loud buzzing during movement
Oh wow. Good luck, hope that goes quickly. I converted mine from a MK4, so I don't think I'll have that option. 😅
Support has replied and suggested some basic stuff I've already checked (check for rubbing cables and lubricating the smooth rods).
Yeah, that sounds similar or identical. After another round with support Prusa would like to have mine back for investigation and repair. I'm working through that process now
RE: Loud buzzing during movement
Check the screws holding the fan duct to the nextruder. Mine had a very similar noise caused by the screws rattling loose. I might try applying some low strength threadlocker to stop that from happening again.
RE:
Interesting. I'd check, but mine is already on the way to PrintedSolid for a check out. I did send them the link to this thread, so perhaps they will read it.
I'm also watching this related thread, which is larger and seems to be describing something similar or identical to what I'm experiencing:
RE: Loud buzzing during movement
Pretty bummed. A bit over 3 weeks later and I got my printer back from repair. It’s damaged. The casing is smashed in at the corner. I can’t get the door open. Unfortunately I can also see inside and it appears the gantry came loose from its cardboard protectors and is not in the shipping position. It must have banged around in there during shipping. I’m not sure how bad it is because I don’t think I can get the door open without breaking it.
In all honesty I don’t think the box looks that bad. I’m surprised by the extent of the internal damage
Waiting to see next steps.
RE: Loud buzzing during movement
Hello,
Is anyone else having a loud buzz/rattle during nextruder movement? It seems to be louder when traveling diagonally.
While it was printing I tried gently pushing on a bunch of stuff to see where it was coming from. I pushed on the screw indicated here, and the buzz goes away. I talked to support, which suggested lubricating that rod but it didn't help.
The next suggested step was tightening screws, so I started using my camera to take pictures of the area to find all the screws that might be impacted by pushing there. I noticed the screw in that set of four directly across from my arrow in the picture is completely stripped. I don't want to make it worse, but it seems probably likely that is the cause.
Has anyone else encountered something like this? I'm pretty bummed. It's easily twice as loud as my Prusa Mini, and I was hoping it would end up being quieter (especially in stealth mode). But with this buzzing you can hear it on the other side of the house.
I'm getting some buzzing on fast movements. It seems to be resonating with the metal walls. Metal on metal contact is my best guess as to the cause.
I'm going to try partially disassembling the machine and putting felt strips between the metal sheets. It's not that loud, but it is an annoying noise.
RE: Loud buzzing during movement
I saw somewhere that you can unscrew a little (by 1-2 turns) every screws from the linear rail, and them retighten them SLIGHTLY in the order showed on the building instructions. To be sure everything is straight, I move the toolhead close to each screw I retightened.
Surprisingly it helped a lot mine.
RE: Loud buzzing during movement
looking at your video, the noise seems to be stronger when you move the printer head horizontally... from the sound of it I'd guess the printer head is not "rolling" smoothly... this said, I am still waiting for my upgrade kit so I cannot offer any hands-on experience yet...
RE: Loud buzzing during movement
Bit of an anti-climactic end here. While Printed Solid claimed the noise issues with my printer were resolved, as noted above it was pretty badly damaged in shipping. Prusa, to their credit, decided to just replace it, which I appreciate. I'm working on getting the new one up and running now. I didn't notice the noise right away on the other one so will know more shortly.
I'm probably biased, but the new one seems quieter all around. And less wobbly. My old one had long straight anti-vibration feet, and the new one has right angle corner feet that are also substantially more dense. Perhaps that is part of it.
Anyway, I saved all my prior bgcodes, so will start running this printer through the exact same prints and see how it compares.
RE: Loud buzzing during movement
Check the screws holding the fan duct to the nextruder. Mine had a very similar noise caused by the screws rattling loose. I might try applying some low strength threadlocker to stop that from happening again.
OMG!!! This was the cause of mine. The resonance sounded exactly as shown in the clips too.
Mine started about two weeks after I had built it. I tried cleaning, re-greasing, various different belt tensions, re-aligning the frame. I stripped everything down to check the bearings, but nothing stopped it.
Then it started doing more head-banging during homing, and this was despite the carriage being perfectly "square" and belt tensions exactly 85/85.
Next I got two head-crashes reported during a head-banging sessions, which is when I remembered this post by @remix7657 and sure enough the two screws were very slightly loose (about an 1/8 of a turn).
Since tightening them, the resonance has gone and so has the excessing head-banging!
For reference, it is these two screws...
RE:
Can you suggest a good machinist square for this purpose? Having trouble finding a decent one without fake reviews online or not being actually square.
Make sure to not just get the end-stops hitting in sync with even belt tension, but also get/use a machinist square to make sure the X-axis is 90° to the Y-axis rods, when the belts are loose.
It should be the case, but if not, there might be quite some strain on the bearings etc.
RE: Loud buzzing during movement
That's not necessary. Just move the gantry to the front (with motors disabled) and ensure that the stops on both sides hit the front simultaneously. Do it with loose belts and bend the gantry until it's square. I squared up my brackets prior to assembly and still had to adjust afterwards as the belts add enough tension to bend it out of square, particularly if they're imbalanced. You avoid this by not tightening down one side then doing the other. Roughly keep the tension somewhat equal as you get to the right tension.
I also move the gantry - center the extruder, move the gantry back a bit, then use a caliper to measure the distance from the brackets to the front to make sure it's still square. That's slightly better than eyeballing that the two sides hit at the same position, but that level of precision isn't really needed.
Can you suggest a good machinist square for this purpose? Having trouble finding a decent one without fake reviews online or not being actually square.
Make sure to not just get the end-stops hitting in sync with even belt tension, but also get/use a machinist square to make sure the X-axis is 90° to the Y-axis rods, when the belts are loose.
It should be the case, but if not, there might be quite some strain on the bearings etc.
RE:
That's not necessary.
Yep, after multiple weeks, I completely agree. The end-stops are fixed in place by two screws in the CoreXY frame, so they can't be out of square.
And if they are, there are way bigger issues with the printer, than squaring the gantry..
I also move the gantry - center the extruder, move the gantry back a bit, then use a caliper to measure the distance from the brackets to the front to make sure it's still square. That's slightly better than eyeballing that the two sides hit at the same position, but that level of precision isn't really needed.
That's a good method! I trusted my eyes and ears probably a bit too much and should've used my caliper.
RE: Loud buzzing during movement
Cool. Thanks for confirming. I’m starting to think that Prusa is crazy for not using thread locker ANYWHERE on this printer.
Starting to regret following the instructions exactly and not using any for my kit assembly.
RE:
How the heck do I use my caliper to do that? I've got a digital one sitting around, but I'm having trouble picturing it. Just trying to get my ducks in a row before assembling my upgrade. After reading all this, now I feel I should've bought spare parts ahead of time. Yikes. Thanks
That's not necessary.
Yep, after multiple weeks, I completely agree. The end-stops are fixed in place by two screws in the CoreXY frame, so they can't be out of square.
And if they are, there are way bigger issues with the printer, than squaring the gantry..I also move the gantry - center the extruder, move the gantry back a bit, then use a caliper to measure the distance from the brackets to the front to make sure it's still square. That's slightly better than eyeballing that the two sides hit at the same position, but that level of precision isn't really needed.
That's a good method! I trusted my eyes and ears probably a bit too much and should've used my caliper.
RE: Loud buzzing during movement
Cool. Thanks for confirming. I’m starting to think that Prusa is crazy for not using thread locker ANYWHERE on this printer.
Starting to regret following the instructions exactly and not using any for my kit assembly.
I did apply threadlocker but to be honest, it's mainly for the sheet metal frame. A lot of the internal components use printed parts and I didn't want to risk applying it there.
RE: Loud buzzing during movement
I had heard that threadlocker could melt some plastics, is that true? I just read it somewhere on here who wasn't sure. What about a high temperature hot glue or something to pin the nut that's spinning and then scraping it off or something?