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IS and Prusa Enclosure  

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Brian Amato
(@brian-amato)
Active Member
IS and Prusa Enclosure

Installed the new stable firmware this morning and started doing a few test prints.  I used the Klipper ringing print to see how that looked and it was clear there's still a lot of ringing going on.  What I can't decide on is if that's caused by the enclosure and squash ball feet I have on the machine or just the enclosure, or neither.  My MK4 wiggles around quite a bit during .2 speed settings.  I decided to run the same print "sans feet" on just the normal rubber feet, but there's still a lot of movement from the printer (and yes, the enclosure is on a stable surface).  The ringing did reduce a bit, but I'm unsure where to go from here.  The bottom of the enclosure is somewhat flimsy in the middle as its elevated on four feet.  Would I tune the IS settings at this point to compensate for wobble in the enclosure, or have other people stiffened the bottom panel already?

Apologies if the answer is obvious.  I'm new-ish to printing and this is my only printer, let alone one with input shaping. 

Posted : 18/09/2023 10:11 pm
CptnObvious
(@cptnobvious)
Active Member
RE: IS and Prusa Enclosure

I am also using the original Prusa enclosure (with the stock feet), and I was noticing a lot of wobble. For me, it seemed to come from the bottom plate being too flimsy/flexible, I solved the issue for me by putting stacks of paper underneath it to fill the gap between the table and the enclosure and I notice a lot less wobble when printing. However, I have not done any ringing test.

Posted : 19/09/2023 8:58 am
Rainer
(@rainer-2)
Reputable Member
RE: IS and Prusa Enclosure

I don't know if you have read my  thread yet. You can try to adjust your frequencies to your needs. It is worth a try.

Posted : 19/09/2023 3:41 pm
ScottW
(@scottw)
Reputable Member
RE: IS and Prusa Enclosure

For the enclosure bottom flex, there are a couple models on Printables that may help (I haven't tried these, but am using a paver stone in the enclosure):
Enclosure Middle Foot
Enclosure Middle Feet

As for the Klipper Test Print Gcode, it will always show ringing.  It is coded with different frequencies from bottom to top, and its purpose is to allow you visually find the height (frequency) where the least ringing exists so you can embed that frequency in your firmware or Start Gcode.

 

 

 

Posted : 20/09/2023 6:34 pm
carlmmii liked
Frank M
(@frank-m-2)
Member
RE:

Like you, my MK4 printer wobbled in the enclosure, which was due to flexing of the enclosures bottom plate, upon which the printer rests.  There was visible back and forth movement of the printer during fast motions, even though my printer table does not wobble and is rather heavy.

I found that placing decks of 52 cards (still in the box, about 17.5mm) between the table and the bottom of the enclosure -- one deck placed approximately below each of the the printer's rubber feet -- eliminated nearly all wobbling.  The enclosure's weight now rests about equally upon the decks of cards and the enclosure's padded feet.

This post was modified 11 months ago by Frank M
Posted : 18/01/2024 10:59 pm
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