Loud grinding/rattling-type noise during fast diagonal movements
There is a very loud noise coming from the printer when it is moving diagonally, this happens on both tool heads I've got, I just finished building the printer and I looked online and didn't see anyone having this problem on the XL (there were other discussions on other prusa printers, does anyone have an idea?
RE: Loud grinding/rattling-type noise during fast diagonal movements
This is pretty common. There were many discussions if this is acceptable or not and I do not wan to start this discussion again, but many people have this behavior and seems to be no problem for print quality and longevity (as far as we can tell for now). I spoke to someone in the Metal industry who told me they have Steel CNC that has a similar behavior and this is not necessarily a problem.
Personally I tune the maximum speed especially in the travel moves a little which makes the printer less noisy and usually only increases print time to about +2%.
There is a very loud noise coming from the printer when it is moving diagonally, this happens on both tool heads I've got, I just finished building the printer and I looked online and didn't see anyone having this problem on the XL (there were other discussions on other prusa printers, does anyone have an idea?
RE: Loud grinding/rattling-type noise during fast diagonal movements
Which setting setting should I try to lower?
RE: Loud grinding/rattling-type noise during fast diagonal movements
The previous poster mentioned travel moves, so that would be Speed for Non Print Moves>Travel. That will slow the max speed down on travel. Reducing the acceleration might make a difference but wouldn't actually slow the max speed down, it would just take longer to get to max speed.
RE: Loud grinding/rattling-type noise during fast diagonal movements
I see, thanks I'll try to see if this will lower the noise level.
RE: Loud grinding/rattling-type noise during fast diagonal movements
Speed for non print moves / Travel: to 300 and it should be less loud.
RE: Loud grinding/rattling-type noise during fast diagonal movements
If it's the same sound I hear. It's resonance in the chassis, the issue input shaping is supposed to reduce, but since we can't tune the frequency using an ADXL sensor ourselves, the only other way is to use rubber mats specifically designed to reduce/remove resonance. Eg. something like https://www.thansen.no/bil/utstyr/innvendig-utstyr/lyddemping/resonansplater-4-mm-40x50-cm-4-stk./n315/pn907170, you should be able to find similar plates locally. Cut them to the size you need and attach them to the inner surfaces of the side plates and under neath the bottom plate, it should dampen the resonances enough to avoid the noise.
RE: Loud grinding/rattling-type noise during fast diagonal movements
...only other way is to use rubber mats specifically designed to reduce/remove resonance...
I cut out a lot of the resonance by sealing the free space between the extrusion and the panels. I did it for the air flow but serendipitously found the resonance issue is oddly gone. I used TPU 95A. The seal works like the orange and black extrusion gap fillers and presses a thin bit into the panel to seal the seam. It's almost invisible. It took about five meters of the stuff to completely cover every joint, including the base panel. It probably should be called the bass drum panel. The models are on my printables page. https://www.printables.com/@EastMemphis_905139/models
RE: Loud grinding/rattling-type noise during fast diagonal movements
Good job. Effective use of little material for two purposes. Adds less weight compared to heavy mats. The side panels of my kit are still lying around. I'd call them rather tuning forks than drums. Pitch is quite high. Thank you for the models. I will give them a try. That will take a while though.
The upper LED panels have bent edges but those are rather close to the profile. A thin strip of double sided sticky tape might be enough there to close the gap and suppress rattling. The top of the LED strip has a damping cover but it is long, bends and is supported only at the ends. I think I will put a thin mat into the ends.
5m of seal sounds a lot but when summed up quickly by hand --- yeah that fits.
Fingers crossed that I manage to reassemble all the pieces of the kit I disassembled.