The Core One needs a very stable surface  

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

Posted by: @kperkins1982

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:

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

Posted by: @cbruun

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.