RE: The Core One needs a very stable surface
Combined with proper damping — materials designed to absorb rather than reflect energy — this helps reduce the amplitude of oscillations that actually reach the print.
It makes me irrationally happy to see someone use the correct word when talking about this stuff. Seems like no one realizes dampening is about making stuff wet.
Anyway, I'm experimenting with active (solenoid) inertial dampers and inerters for the Core One. Supposedly, arrangements of inerters can provide perfect decoupling [paper]. I've got a couple dozen papers about inerters if anyone is interested.
RE: The Core One needs a very stable surface
I've been watching auctions on govdeals for vibration isolation tables.
Some university or lab pays crazy thousands and thousands for one and then sells it for 50 bucks or whatever, it is nuts
My brother got a pulmonary isolation chamber for 10 dollars because he was the only bidder. A telephone booth sized sealed glass enclosure with penetrations for power and airflow with valves, it's basically the worlds best print enclosure.
I'm hoping to get a vibration isolation chamber, just gotta catch one that isn't a 400 mile drive
RE: The Core One needs a very stable surface
I've been watching auctions on govdeals for vibration isolation tables.
Those may work, but not all of them will, I guess. Since they are designed to keep low-amplitude vibrations transmitted by the floor away from the setup on the table, they have very soft suspensions, especially in the horizontal direction. Major moving masses on the table might well bump the suspensions into their limiting stops. On the other hand, if the tabletop is large and heavy enough, that will already limit the movement amplitudes which a 3D print head can induce.
The above refers to the proper "active" air suspensions, which require an external supply of compressed air. A table with passive dampers may be good enough and should avoid the "too soft" problem. It would still give you a sturdy and stiff base and a heavy top.
RE: The Core One needs a very stable surface
It makes me irrationally happy to see someone use the correct word when talking about this stuff. Seems like no one realizes dampening is about making stuff wet.
Well:
Formerly known on this forum as @fuchsr -- https://foxrun3d.com/
RE: The Core One needs a very stable surface
So essentially what we have is a shelving unit with a lot of weight on it for dampening and viscoelastic sorbathane for vibration isolation and a Rick and Morty amount of leveling
You might be my spirit animal.
RE: The Core One needs a very stable surface
I have placed the Core One on a 40 × 40 × 4 cm concrete slab weighing about 15 kg, which rests on a foam mat (for yoga, camping, ...). This setup works well. I have a glass bottle with IPA on the desk next to the Core One, and I don’t observe any movement in the liquid’s surface.
RE: The Core One needs a very stable surface
Would an IKEA Lack table be stable enough? Or is it recommended to add more weight to the table?
RE: The Core One needs a very stable surface
Would an IKEA Lack table be stable enough? Or is it recommended to add more weight to the table?
If you set it up on a hard floor, flex in the table should not be an issue at all. The whole table will just wander across the room as the printer does its thing. 😉
More seriously, I would be concerned about acoustic noise. If Lack tables are still made like the two old ones I have, the tabletop works great as a resonator.
RE: The Core One needs a very stable surface
More seriously, I would be concerned about acoustic noise. If Lack tables are still made like the two old ones I have, the tabletop works great as a resonator.
Maybe drill a hole in it and fill it with steel BBs, sand, urethane, or a combination thereof?
RE: The Core One needs a very stable surface
Ikea Lack is just air trapped by paper in a honeycomb pattern with a slight whiff of something wood-like on top (source: Ikea website). Like Jürgen says, if you want some extra resonance that's the way to go. The table weighs nothing and I'm not sure the joints (if you can call them that) are made to withstand lateral forces for a long time - on the other hand, at that price point you can just buy a new one every few months when the old one falls apart.
In my opinion having a rigid base with some weight to it together with decoupling that base from the printer with some dampers (eg rubber feet) is probably the best way to go.
RE: The Core One needs a very stable surface
LACK is a cheap POS. Having said that I used it to build 4 enclosures for Mk4 and Minis but just the top, not the legs, on a super sturdy workbench with pavers underneath the printers.
To avoid resonances, you want to run away from LACK as far as you can.
Formerly known on this forum as @fuchsr -- https://foxrun3d.com/
RE: The Core One needs a very stable surface
I haven't had my core one long but the table I have it on would would shift around and bang against the wall while I was printing. I cut a pool noodle to the length of the table then cut the noodle down its centre and slid it onto the lip of the table where it impacted the wall. This has cut down on both vibrations and excess movement and might be a low tech solution for some setups. I'm still going for a supported concrete slab though.
RE: The Core One needs a very stable surface
a thought on phasestepping (core one).
Is the software able to calibrate each z-motor individually, because of the splitter ??
RE: The Core One needs a very stable surface
So far very impressed with the core one. The speed is incredible. But I have it sitting in the same spot that my soon to sold MK3S sat. The old printer was very stable sitting on a cement paver, which sits on heavy duty metal cabinet. But the core one is very top heavy and with a lot of rapid moves it really rocks the cabinet. I need to find something that will be stable yet not to industrial looking. Gotta keep the wife happy. Any suggestions?
RE: The Core One needs a very stable surface
I built this
and not only does the stand not budge, the printer also has become much quieter. I perceive it to be only barely louder than my Brother laser printer.
Sadly I'm not aware of something like this being sold so the options to obtain it would be to build it yourself or pay somebody to build it.