HULA Anti-Vibration Feet for 3D PRINTERS - Do they WORK?
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- Опубликовано: 2 авг 2024
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👉🏻 In this video I am testing how a unique design of anti-vibration HULA feet performs on different types of 3D printers like cantilever, full frame bed slinger, and core-xy. Do they work or are they just a skip?
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📢 OTHER MENTIONED THINGS:
- HULA anti-vibration feet makerworld.com/en/models/417509
- CNC Kitchen video • Seriously the BEST $2 ...
- Made With Layers video • Wobbly 3D printer make...
🕗 TIMESTAMPS:
00:00 - Intro
00:42 - Making HULA & more info
02:30 - Mid-size bed slinger results
02:52 - Big bed slinger results
04:34 - CoreXY printer results
05:37 - Cantilever printer results
06:30 - Summarizing all results
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I don't know how people don't understand what it does. It just transfers vibrations to the "next" place. So if you have input shaper, now it needs to cancel vibrations that come from two different sources. One is the printer itself and the other is "backwave" vibrations that come as "echo" from feet back into printer. Those feet are just solving the problem of "oh no, my table is shaking". Best way to solve ringing is putting printer on sturdy surface and use input shaper. Point in vibration dampers in buildings isn't to completely stop building from moving, it is to "delay" waves so that the whole building is moving as one body, without having differential movement between floors themselves. And you can't use the same logic in printers. In 3d printers you have printer itself, moving head and table/floor under it. If you have sturdy surface under your printer, input shaper is just solving for differential movement between printer and printing head. It's like learning to juggle two balls by having someone constantly throwing you the third ball...
So pretty much every video on these things has proven them to be almost useless for better print quality. The only thing these things do is make your desk shake less and reduce noise.
Pretty much my experience, but that was exactly what i was after. The printer put resonaces into the floor i could hear everywhere with these feet installed it's gone
same here
I got mine from voxelpla and it stopped the shaking on my table completely. As for print quality it is the same as before. That is a win for me.
Pretty much the same conclusion I came to watching a bunch of videos on the hula feet. I'll stick with my MDF boards with foam weather stripping. It gives enough separation so that vibrations don't resonate to the table top.
Makers Muse put a Bambu 3D printer on a wobbly table and even suspended it from the ceiling and found that it made no difference whatsoever to print quality. All that matters is the kinematics of the moving mass.
thanks for taking the time to do all the testing. like many 3d printer mods this is a solution that doesn't solve any problems
i really appriciate how you are able to give your words meaning by not only telling but showing, and proving. For at lot of other 3d printer channels, they simply show the good from the product and give the corporate speech, but here its what happens that tasks senter stage. Thank you for what you do :D
I use Sorbothane Duro 50 1.25" hemispheres on my bed slinger. Works wonders at isolating and damping. And you don't have to assemble anything.
That looks interesting! Like to see some results with that.
Those dampeners do look really flimsy to me. If shop machines have dampening, they always seem to have chonky hard-rubber dampeners.
Very interesting that they actually helped with the big bed slinger. That's useful information.
When alone yes, but with four on each leg they feel way stiffer. I would play with the stiffness if improvements I got were higher. But Input Shaper does ~95% of the magic already.
thank you for your scientific approach to it all
For cantilever printers it's better to leave square corner velocity and just pump up the acceleration as well. For my voron 0, 5 square corner velocity with 40k acceleration runs smoother than 20 square corner velocity with 25k acceleration
This reaffirms my suspicions, decoupling your printer from a reference plane (solid ground) to sink it's vibrations into, usually tends to push those vibrations to other axis arbitrarily. And that's even harder to cancel out. Tuned dampeners is really the only true answer, and they would be unique per mass, likely need to be integral to the frame and/or motor mount systems. The easiest solution by far is input shaping, then slowing things down more when you really don't want resonance artifacts.
I put my printer on squash balls. They come in different hardness/dampening values. It really helped to quiet down my printer because the wood shelf it's standing on acted like a subwoofer with the fans.
I think these feet are better at isolating the printer and table movement from each other - so the effect on print quality is, for the most part, going to be negligible. The advantages would be in noise isolation (for example, if your table rattles when the 3D printer is running), and also less likelihood of causing layer shifts and other artefacts if you for some reason bump the table.
To actually be useful for reducing ringing, they would need to be movement dampers and not isolators; straight rubber or foam probably does a better job at this due to hysteresis. More hysteresis = more damping.
I wonder how well memory foam would work for that?
i tried isoacoustics speaker feet i have lying around on my corexy and it damped vibration transmission to my rack. print quality wise seems the same. i have since switched to cheaper sorbothane feet.
Would also like to see a comparison against cnc kitchens setup with the foam and tile.
I've been using hula on my A1 mini and x1c. Way better results than the bambu vibration feet on x1c and mini results look the same to me
I came across the 'sherpa crew' a 'dual stage' extruder. It might be interesting to see if such a design has benifits for flow rate/layer consistency
it seems like maybe on a bed slinger you would be better off with feet that only move in the same dimension as the bed.
The hulas seem to just be a misunderstanding. In an earthquake,the ground shakes and the rapid movements break the building. But on a printer, the printer itself shakes.
If anything, the hula protects you printer from an earthquake, and it prevents shaking of your table.
What you really need is effective damping and a way to dispose the energy from rapid motor acceleration.
If you look at cnc mills and lathes none of them use anti vibration feet. They use mass as a damper as they weigh a ton.
I decided to try these out for my K1. Got the solid parts printed, but I'm waiting on VoxelPLA to ship the hardware... ordered over 2 weeks ago. Good video with the various tests, especially considering the instructions for HULA say to run RC before installing. Which test model did you use for your tests?
Yeah, I am not sure why, because those feet can affect resonance frequencies of the printer, so re-running the shaper should be right way. I used klipper ringing tower print.
Has there been an opposite test done somewhere? like where people bolt down the crap of a 3d printer to concrete or something?
You would probably get better results if you made one large Hula that the printer rides on as that will provide a much larger damping area.
You are hitting a hard stop on those little feet.
Try scaling it up and use the foam below the scaled up one and I bet you will see some significant improvements.
My understanding is that the point of vibration suppression is absorbing the vibration in a way so that the printer remains still. If the printer is moving, there is no point. Concrete slabs still the king imo.
Transferring some of the kinetic energy into the feet reduces the amount of peak acceleration seen by the print head. I think it depends on where the stiffness in your system is as to whether it helps or hurts.
I build some similar feet for my modded Sapphire Pro. It is basically standing on TPU springs. My printer seems to be a bit too heavy for this to work well long term and the mass isn't centered so it shifts to the back feet.
That being said I noticed a pretty big improvement for my max accel and the noise is a lot better with these feet and being on the floor vs on top of some drawers.
Edit: My guess is that if your frame is solid then it probably doesn't help that much if at all but if your frame isn't that strong this might have a bigger impact. Being allowed to swing back and forth should take a bit of force that would normally be absorbed by the frame away.
Why do you think we aren't seeing a spring and pressureized damper approach?
Thanks for the good piece !
ps. as much as I understand you don't intend to make this channel focus on specific models, the finetuning of your P1S still is very interesting to me :-) perhaps you could do a side video with all the things you put in place for best results?
The only adjustment I made that affects print quality is the belt tension to reduce VFAs. That's literally it. You will gain way more by manually fine tuning flow rates and pressure advance for each filament and for example by changing wall printing order to inner/outer/inner. :)
@@PrintingPerspectivethanks for the answer, the inner outer inner has been changed, thanks to you!
usar los hula hula y esperar lo mejor jajajajajajaja
igual intente hacer una base para mi ender s1, mejore un diseño que estaba gratis pero realmente parecían amortiguadores. jaja cuando iniciaba una impresión todo se movía como tus impresoras en tu video... haciendo peor la calidad!
Al final la ingeniería para reducir las vibraciones es colocar una goma similar como la que viene por stock en los pies de la impresora para que pueda absorber completamente cualquier movimiento, como majin boo puede absorber cualquier golpe con su densidad del cuerpo gomoso.
ahora imagínate un resorte o que aporte mas movimiento como los hula hula. empeorara!! termine colocando una esponja densa como la que viene de stock y funciono de maravilla, ya no vibra, al contrario absorbió aun mas movimiento
I wonder how squash balls compare to hula feet
Surely the real test would to see print quality during an earth quake.
Put your 3d printers on a washing machine during a spin cycle with and without the feet.
That is where you would see the most difference 😂
Also they would reduce vibration to the surface they sit on so another test would be to try and hand write something on the same table during a speed benchy with and out feet 😂
i bought Spring Isolation pad Shock Absorber feet for subwoofers for 10 bucks and work better than those. also these only work if you have a wobbly desk. using them on stable surfaces makes them worse.
Has your PCBway SLS nylon parts creep ?