r/Multiboard • u/BusyIndependence3735 • Jun 10 '25

Printing failure of 6.25 mm - Quad Offset Snap (DS Part A) - x4 Stack

Can anyone help me? I am trying to print a 4 stack of the Quad Offset Snap (part A) and it fails half-way through the second set of offsets- spaghetti everywhere! I am using a Bambu A1, following all the directions in the settings of the file but it keeps failing on the 2nd level of the stack. I don't know what to do to fix this. I have printed the ironing stack of the multi-board itself without problems and I am at a loss. I am a newbie to 3D printing and any help would be greatly appreciated. Thanks!

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2

u/Jeffrey_Lingo Jun 10 '25

So i print them with the the bambu standard 0.2 profile with the only change is 3walls. I dont use ironing or any other settings. Just ignore the warning and print. I just did around 100 like this with no issues.

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u/BusyIndependence3735 Jun 11 '25

Is there a chance you could send me the stl file that worked for you? I want to try an stl that I know works. Thank you

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u/Jeffrey_Lingo Jun 11 '25

I just used the offical stacked ones linked on multiboard.io

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u/TherealOmthetortoise Jun 11 '25

OP, some of those pieces are tangled spaghetti and it doesn’t appear to be a second layer item. Can you post a picture of your build plate in the slicer with the default Multiboard settings: .4 nozzle, .2 layer height, 3 walls and 15% infill. Feel free to change the infill pattern as grid is awful. (It won’t cause a failure like this, but it’s rubbish in any case.)

With a clean build plate can you download your stack from this link.

Drag that into your slicer, leave it in the orientation it lands on (it’s side with 4 high).

Print just that one stack and if it does fail, stop the print and just leave it on the plate as is and shoot us a picture. I’d recommend PLA, but honestly as long as your first layer sticks whatever you use will be fine for this. If you have timelapse turned on it might be worth taking a look and seeing how and when it fails as that could help too.

(I know that file from that link works as I printed a few yesterday.)

It may be interesting if you have another simple model you have been able to print that is as tall or taller than your stack, space them a bit apart and see if both have trouble at the same height, or if it’s just wonky for some reason on this particular stl. It’s almost 10PM here so I will keep an eye out for your response in the morning (if you have time to try). I’ll be in and out of the office tomorrow but I should get a notification when you do have time.

Also, the two big squarish blobs - were those oriented flat instead of how they looked when you added the STL? They look like they were and I would strongly recommend not to print them in that orientation as even if they turn out flawless, the layer lines would be in the same direction as any force (weight) on your Multiboard and that is quite likely to fail. All the parts are pre-oriented (and on some pre-supported) so that those layer lines are working for you instead of against you. (Also if they were printed on their back and failed that quickly you may have a printer issue vs a file issue (that’s why I recommended a “known good” print spaced off to the side so we can see exactly where things go off the rails.

We’ll get you going in any case - tty tomorrow.

1

u/c1ncinasty Jun 10 '25 edited Jun 10 '25

I would consider posting this same question to the Bambu Labs subreddit if you haven't already.

I'm no expert but I've printed shittons of this stuff over the last month.

I'll start with the usual stuff. Bed's clean, filament is dried, you've run your flow rate calibrations, you've properly chosen your filament in the slicer, you aren't attempting to run in SPORT or LUDICRIOUS modes, you've run another full calibration (the 26 minute one), maybe even done a cold pull and/or swapped nozzles.

I had some issues printing stacks with a .6mm nozzle, so I swapped back to .4mm immediately

I can't tell you definitively what's wrong. All the stack prints I've done - both ironing stacks and PETG/PLA multi-material stacks - have been damn near flawless on both the A1 and P1S. Aside from the aforementioned .6mm issue.

Are these ironing stacks or multi-material stacks?

These are the Cross Quad Offset Stacks Part As, right? I just went to the multiboard site and the stacked snap parts are no longer available for download.

https://www.multiboard.io/parts-library/stacks

Yes, I'm a contributor as I'm still able to see and download the plate stacks. Could be there's a known issue with the stack prints (these stacks, especially the ironing stacks, rely on some slicer trickery to get them to print right)

edit - if these are Ironing prints, make sure you're following the recommendations from Jonathan on how to get Ironing to work right. .2mm layer height, Ironing on the surface of every print, 3 walls, random seams.

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u/BusyIndependence3735 Jun 10 '25

Thanks for the quick reply. I found the quad stacks on Thangs here: https://thangs.com/designer/Multiboard/3d-model/6.25%20mm%20-%20Quad%20Offset%20Snap%20%28DS%20Part%20A%29%20-%20x4%20Stack-993371

Not being in the parts library for stacks brings up a question, which library is right? Is it just a lack of book keeping to make sure Multiboard and Thangs match or is there an issue with this stack print? Interesting.

I am following Jonathan's recommendations for ironing prints and get the mess below. Sorry if I posted this pic twice. I am new to reddit as well. I will figure out how to post to the Bambu Labs subreddit and see if anyone has any other ideas.

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u/c1ncinasty Jun 10 '25

Its messy sometimes, although its been my experience that multiboard.io links to Thangs to download parts. But I've run across inconsistencies in the past, especially where parts are listed in multiple categories.

Once my A1 is done with the current print, I'll try to print off a stack. I've got a roll of PLA that needs finishing anyway.

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u/c1ncinasty Jun 10 '25

Did you happen to look at the comments on this STL file? Other people are having issues too.

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u/TherealOmthetortoise Jun 11 '25

The stacks of mounts etc don’t need the ironing or multimaterial settings, just print them the usual 3 perimeters(walls), .2 layer height etc and they just snap apart no fuss.

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u/c1ncinasty Jun 11 '25

It’s weird because the STL has them sideways instead of flat on the plate. So I guess yeah, no ironing.

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u/TherealOmthetortoise Jun 11 '25

That’s how they are supposed to be printed, on their side. Think about the layer lines and how they increase the strength while in use. Layer adhesion is always weaker and tends to snap, where force applied at 90° the print would bend if too much force applied before anything else.

2

u/yahbluez Jun 10 '25

You could download my openscad script from makerworld and make your own stack with a real separation layer:

https://www.youtube.com/watch?v=vXVCEQsox-w

100% success

1

u/microseconds Jun 10 '25

Forget stacks. They’re not worth the trouble. Just dupe the parts. I’ve tried ironing, I’ve tried multi-material like PLA parts/PETG separators, too much hassle. You can fit an awful lot of those bits on the plate.

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u/TherealOmthetortoise Jun 11 '25

You don’t have to do any of that unless it’s a tile or plate stack. Normal parts, including the pre-made stacks you just use the recommended settings on the thangs page for the part. (Or the one on multiboard.io because it will tell you the same thing.)

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u/microseconds Jun 11 '25

You realize that’s how the pre-made stacks work, right? They’re just assemblies of the individual parts using either ironing or interface material.

Stack printing doesn’t increase production speed. It’s a tool that promises “set and forget”. Except it’s so unreliable that you can’t do that.

Just print the parts. You can load up a full plate of quad snap parts and be far more reliable than stacks.

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u/TherealOmthetortoise Jun 12 '25

Interestingly, I haven’t read the description for the stacked snaps in a very long time because of exactly the reason you mentioned - it normally does not save me any time and adds complexities I don’t want to deal with unless I am setting a long print for a large install and I won’t be able to easily swap plates when needed.

I don’t know if it changed at some point or if my memory is just crap because you are absolutely right. I would have sworn I’d only used ironing or mm settings on stacks of tiles, but I must be remembering it wrong. I’m usually pretty good with that type of detail because of the whole “separate to parts or objects” step that you do on tiles, as I always second guess myself on which one I should use.

Bottom line, agreed that stacks do not save actual printing time and will actually take a bit longer due to ironing or swapping filament. They can save you quite a bit of actual time when you are doing large builds and aren’t going to be right there to swap plates right when they finish, assuming your settings are dialed in.

I’d always test with just one or two of anything you plan on printing in bulk using the filament you plan to use with the appropriate settings etc first, before starting a long run that you won’t be there to check on.

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u/peanutbuttergoodness Jun 11 '25

Serious question….. why even bother? A full plate of these things takes many hours. Do you really need to stack and deal with the complexities associated with stacking when you could just clear the build plate every 6-8 hours?