Shaken Screw Syndrome?
I have tried to read as much as possible about problems people have had with assembling the Core One and 3D printing in general as I have just starting printing. However, I have not read anywhere in which people are having issues with the Fan Shroud staying attached. About a month ago I had a failure due to one screw falling out of the fan shroud. This morning I found both screws had fallen out of the Fan Shroud. The resulting mess does make me understand the term spaghetti monster much better.
Occam's Razor says the screws shook themselves loose over time, is Occam believable in this instance or should I be looking at something else? If Occam is right, beyond scheduling a tightening check every couple of weeks, is there anything I can do to keep the screws in place? Also, are there any other screws that have a tendency to shake themselves loose?
RE: Shaken Screw Syndrome?
When I replaced my fan shroud it was also because of a loose screw which caused the shroud to get pushed into the heat block and melt. I printed a new shroud and used blue Loctite on the screws
RE: Shaken Screw Syndrome?
When I replaced my fan shroud it was also because of a loose screw which caused the shroud to get pushed into the heat block and melt. I printed a new shroud and used blue Loctite on the screws
I am going to assume that Loctite 242 (temperature resistance to 150°C) would work, while it is close to the nozzle, it is not so close that using Loctite 246 (temperature resistance to 230°C) would be needed.
Have you had any other screws shake loose that I should consider using Loctite on?
RE: Shaken Screw Syndrome?
It's only an opinion, but in my printer every single metal-to-metal screw is threadlocked (excluding the thumb screws on the nozzle).
We've got thermal cycling, we've got non-negligible vibrations, we've got a gazillion screws in hard-to-reach places.
I understand the rationale of not promoting use of threadlock in the kit from a support perspective. But that serves the vendor, not me.
RE: Shaken Screw Syndrome?
When I replaced my fan shroud it was also because of a loose screw which caused the shroud to get pushed into the heat block and melt. I printed a new shroud and used blue Loctite on the screws
I am going to assume that Loctite 242 (temperature resistance to 150°C) would work, while it is close to the nozzle, it is not so close that using Loctite 246 (temperature resistance to 230°C) would be needed.
Have you had any other screws shake loose that I should consider using Loctite on?
When I installed the Hula feet (mistake in hindsight) the printer was shaking so much that I would find 2 or 3 screws stuck to the magnets underneath the print bed. Like @mnetwig I thread locked most of my screws that I can still reach.
RE: Shaken Screw Syndrome?
When I installed the Hula feet (mistake in hindsight) the printer was shaking so much that I would find 2 or 3 screws stuck to the magnets underneath the print bed. Like @mnetwig I thread locked most of my screws that I can still reach.
Okay, not one to pass up on reasonable advise, when the Loctite arrives it will be used on any metal to metal screws I can find. But what did you not like about the Hula feet? I have them installed and they seem to be helping, am I missing something?
RE: Shaken Screw Syndrome?
You'll probably get best results from a stock core one if you place it stiffly (stock rubber feet) on a solid surface. Then the printer moves the printhead.
Floating it, giving it more degrees of freedom to move, achieves the opposite: the print head moves the printer. Question is, do I want this. Why would I.
Take a hint from any "serious" piece of machinery that is placed on a firm foundation not floated on an air cushion. Unless the subway underneath rumbles so badly that it needs to be isolated.
No clear consensus on this one but neither on Loctite.
RE: Shaken Screw Syndrome?
When I installed the Hula feet (mistake in hindsight) the printer was shaking so much that I would find 2 or 3 screws stuck to the magnets underneath the print bed. Like @mnetwig I thread locked most of my screws that I can still reach.
Okay, not one to pass up on reasonable advise, when the Loctite arrives it will be used on any metal to metal screws I can find. But what did you not like about the Hula feet? I have them installed and they seem to be helping, am I missing something?
+1 on @mnentwig comment
Basically the printer was shaking so much that is was knocking out screws. The reason I installed it was I was on a mod spree (before I knew better). I get a quieter printer and better results with this mod Prusa core One feet v2 but using PEBA Air instead of TPU.
RE: Shaken Screw Syndrome?
The reason I installed it was I was on a mod spree (before I knew better).
Remember: "If it ain't broke, fix it until it is." -Unknown
🤣
See my (limited) designs on:
Printables - https://www.printables.com/@Sembazuru
Thingiverse - https://www.thingiverse.com/Sembazuru/designs
RE: Shaken Screw Syndrome?
+1 on @mnentwig comment
Basically the printer was shaking so much that is was knocking out screws. The reason I installed it was I was on a mod spree (before I knew better). I get a quieter printer and better results with this mod Prusa core One feet v2 but using PEBA Air instead of TPU.
The great part about 3D printing is that you can try many different things. Which means I can print the Core One Feet v2, install them, and make completely unscientific observations. I will be using TPU over PEBA Air. I have looked into PEBA Air and it looks like a very interesting filament, but not yet.
Thanks again for the advise
RE: Shaken Screw Syndrome?
+1 on @mnentwig comment
Basically the printer was shaking so much that is was knocking out screws. The reason I installed it was I was on a mod spree (before I knew better). I get a quieter printer and better results with this mod Prusa core One feet v2 but using PEBA Air instead of TPU.
The great part about 3D printing is that you can try many different things. Which means I can print the Core One Feet v2, install them, and make completely unscientific observations. I will be using TPU over PEBA Air. I have looked into PEBA Air and it looks like a very interesting filament, but not yet.
Thanks again for the advise
Another useful mod, it's similar to the short feet I linked but instead of TPU pads, you remove the adhesive and reuse the rubber feet. They pressure fit in.
RE: Shaken Screw Syndrome?
+1 on @mnentwig comment
Basically the printer was shaking so much that is was knocking out screws. The reason I installed it was I was on a mod spree (before I knew better). I get a quieter printer and better results with this mod Prusa core One feet v2 but using PEBA Air instead of TPU.
The great part about 3D printing is that you can try many different things. Which means I can print the Core One Feet v2, install them, and make completely unscientific observations. I will be using TPU over PEBA Air. I have looked into PEBA Air and it looks like a very interesting filament, but not yet.
Thanks again for the advise
Another useful mod, it's similar to the short feet I linked but instead of TPU pads, you remove the adhesive and reuse the rubber feet. They pressure fit in.
So you recommend against TPU/PEBA/HULA/Squashball? Currently assembling my core one and put new vhb adhesive on them after cleaning and they stick pretty well on their own. I did wonder if the adhesive would change the properties given that it's a little thick.
Anyways, thanks for your time :O
RE: Shaken Screw Syndrome?
My C1 stands on “packaging foam feet.”
It has more room to move and still stands stable thanks to its weight.
Quick start printing for Prusa XL and Prusa Core One
Comfortable display working height on the Prusa Core One
Reducing metallic resonance noises on the Prusa Core One
RE: Shaken Screw Syndrome?
The shaking does continue, I have used Loctite on fan shroud, but then starting having issues with the nozzle dragging over the print, the thumbscrews had shaken loose. It is amazing how the printer doesn't shaken or vibrate the table as much as it first did after switching to a more stable table, adding the Hula feet, and using the accelerometer for phase stepping and that other test that is not coming to mind right now. But I still have screws shaking loose. But hyiger's recommendation of Loctite does seems to be working, as I find shaken screws (that are metal to metal) I add a touch of Loctite. Only time will tell how well it works, but for now that is my plan.
RE: Shaken Screw Syndrome?
The shaking does continue, I have used Loctite on fan shroud, but then starting having issues with the nozzle dragging over the print, the thumbscrews had shaken loose. It is amazing how the printer doesn't shaken or vibrate the table as much as it first did after switching to a more stable table, adding the Hula feet, and using the accelerometer for phase stepping and that other test that is not coming to mind right now. But I still have screws shaking loose. But hyiger's recommendation of Loctite does seems to be working, as I find shaken screws (that are metal to metal) I add a touch of Loctite. Only time will tell how well it works, but for now that is my plan.
I only had problems with screws falling out when I was using the Hula feet. Before that I was using static feet (and now I have switch back to static feet). I did replace the screws with a bit a blue Loctite. It's seems decoupling the printer from a large mass (my table) using Hula feet cause more problems than it solves.
RE: Shaken Screw Syndrome?
The shaking does continue, I have used Loctite on fan shroud, but then starting having issues with the nozzle dragging over the print, the thumbscrews had shaken loose. It is amazing how the printer doesn't shaken or vibrate the table as much as it first did after switching to a more stable table, adding the Hula feet, and using the accelerometer for phase stepping and that other test that is not coming to mind right now. But I still have screws shaking loose. But hyiger's recommendation of Loctite does seems to be working, as I find shaken screws (that are metal to metal) I add a touch of Loctite. Only time will tell how well it works, but for now that is my plan.
I only had problems with screws falling out when I was using the Hula feet. Before that I was using static feet (and now I have switch back to static feet). I did replace the screws with a bit a blue Loctite. It's seems decoupling the printer from a large mass (my table) using Hula feet cause more problems than it solves.
Shoot, so you're telling me my 50 lb cement paver with sorbothane feet was a bad idea? I feel like that's still an okay idea to make sure the tempered glass on the aluminum desk doesn't shatter. Maybe I'll just keep the default feet for now. I'm wary about using loctite on PC because it can cause cracking and stuff. I guess it wouldn't matter if you have a spare on hand or know beforehand and print a spare.
RE: Shaken Screw Syndrome?
Not at all. I was just mentioning that (for me) the Hula feet were a bad idea. They caused more issues than they were purported to solve.
RE: Shaken Screw Syndrome?
Not at all. I was just mentioning that (for me) the Hula feet were a bad idea. They caused more issues than they were purported to solve.
@newprinter, I would not use loctite on PC not matter what the problem is.
As for the Hula feet, some people swear by them, others indicate that they cause more problems than they fix. Both camps are probably right. I don't know if anyone has actually done any science on the feet (or any of the other options), but the science would probably come back with each option tested performs great on one aspect, but poorly on another. @hyiger is of the opinion that the Hula feet are not good for his setup. It is also starting to appear to me that it might not be good for my setup, as the screws that are shaking loose are around the Nextruder, and that could be a problem.
RE:
Not at all. I was just mentioning that (for me) the Hula feet were a bad idea. They caused more issues than they were purported to solve.
@newprinter, I would not use loctite on PC not matter what the problem is.
As for the Hula feet, some people swear by them, others indicate that they cause more problems than they fix. Both camps are probably right. I don't know if anyone has actually done any science on the feet (or any of the other options), but the science would probably come back with each option tested performs great on one aspect, but poorly on another. @hyiger is of the opinion that the Hula feet are not good for his setup. It is also starting to appear to me that it might not be good for my setup, as the screws that are shaking loose are around the Nextruder, and that could be a problem.
This is the table I use for my printer: Stationary Shop Stand - 36 x 24" so as you can see it's very sturdy. I think one attraction for Hula feet is they shake the table a lot less because the printer is mostly decoupled from the table. But instead of not shaking the table, you are transferring that motion to the printer and shaking it instead.
I doubt there are any objective studies of the pros and cons of Hula feet on a Core One. They certainly look cool. Subjectively I didn't find them any worse than static feet in terms of print quality or noise. Objectively I found a lot more loose screws stuck to the print bed with the Hula feet.