Help with 3D Printing a Shaker Instrument - Resume Issue After Pause
Hi everyone,
I’m working on printing a shaker instrument (like a maraca) based on this model: Easter Egg with Bunny Ears. I’m starting with the smaller egg and modifying it for my project.
Here’s what I’ve done so far:
- I sealed the bottom of the egg with a 30mm cylinder with "add part" in PrusaSlicer.
- Following the guidance on the Printables page, I set the object to 1 perimeter (wall).
- I added a pause at 40mm height to pour rice inside, so it gets trapped after the print finishes and creates the shaker sound.
The problem: I’ve tried printing this twice, but both times, after resuming from the pause, the nozzle seems to start too high. The layer after the pause doesn’t bond properly to the one below it, causing the print to fail. I’ve attached pictures below to show the issue.
I’m really puzzled by this because I’ve done dozens of pause-and-resume prints before—manual color changes, embedding objects, you name it—on my trusty MK3S without any trouble. So I’m scratching my head trying to figure out what’s going wrong here with the Core One.
I’m wondering if this could be related to the printer itself — maybe the load cell, calibrations, or something else? Or perhaps I’m missing a step in my process. I’d really appreciate it if someone with a Core One could test this: print the model, pause it halfway, wait a minute, then resume, and let me know if the resume works correctly for you.
Additional details:
- Material: PLA
- PrusaSlicer settings: 0.15mm STRUCTURAL preset
- 1st attempt: Default settings
- 2nd attempt: Changed extrusion width to 0.6mm (using the stock 0.4mm HF nozzle)
Any advice or insights would be greatly appreciated. Thanks!
Odd possibility. You are adding a relatively large volume of cold material to a still hot print. You may have induced thermal contraction and local overcooling - try warming the insert material, the rice, to the print-bed temperature before adding it.
Cheerio,
RE: Help with 3D Printing a Shaker Instrument - Resume Issue After Pause
Clever thought.
Unfortunately, I tried heating the rice with a heat gun before pouring it in. It made no difference.
OK, I would then try printing the instrument in two parts, shape a socket or even a thread into the design, print both and fill after printing - finishing by joining and maybe glueing.
Cheerio,
RE: Help with 3D Printing a Shaker Instrument - Resume Issue After Pause
I do not yet have my CoreOne, but there have been reports of weirdness with print resume. Odd things happen to some when they open/close the door. So I can think of two possible factors.
1, Print resume is being weird
2, The weight of the rice being added is causing the bed to sink in Z (not a problem on the Mk3)
It would be interesting to test the print, have it pause, not add the rice and resume and see where that leaves you. I would think the steppers could hold the 50 grams or rice (or however much you are adding) but it might be an interesting test.
RE: Pause firmware fixed in 6.3.1
A few days ago I discovered that PAUSE, whether programmed in the gcode or called on the control panel, has a bug which restarts printing at the wrong height.
After discussion with Prusa Chat I was advised that Firmware update to 6.3.1 has now addressed this - and, in my experience, it has.
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