7

Design a different connection to the shaft, however I don't know of any Use a shaft/flange coupler to be fastened to your shaft and to your printed part. Without knowing the length of the shaft, you could connect a flange/coupler to design this into your gear. This is a good solution if you have to transmit larger torques. See e.g. this pulley that ...


5

I’ve never actually printed anything other than PLA, but... Searching the web for filament density, I found this article , among others, that indicate that PLA is nearly 20 % denser than ABS, on average (1.24 vs 1.04 g/cm3). This indicates that a 1 kg reel of ABS will have 20 % more volume (therefore length) than a 1 kg reel of PLA. This does not quite ...


3

Filament that absorbs water prior to printing is subject to boiling temperatures as it passes through the heater block. In extreme cases, steam will be visible and a spitting sound will be heard. The filament will expand as the water exits, causing multiple structural and printing problems. Once printed, dry filament may absorb water from the atmosphere, but ...


3

If you're thinking of changing materials, you're looking at the wrong parameters. PLA has a higher hardness than either PETG or ABS, but hardness isn't what you want. The problem you're experiencing is creep, where a material flows in response to pressure. Of the common printing plastics, PLA is by far the most susceptible to creep. Either ABS or PETG ...


3

While printing a roller stamp or rubber-roll from a flexible material such as [hard]TPU, [softer] TPE, or even a [super soft] foaming flexible filament is certainly possible. In any case, this would create soft, somewhat squishy prints. These prints will work quite easily as a stamp or woodblock printing stock, transferring ink from a pad to paper. The print ...


3

Most commercial blow-molded fuel tanks for model airplane fuel (methanol or ethanol, nitromethane or nitroethane, and some combination of castor, mineral, or synthetic lubricating oil) are made from HDPE. This material isn't commonly seen as filament, in my limited experience, but it ought to be possible to arrive at settings that will give a liquid tight ...


3

A good option would be to use a (set-)screw to press against the flat of the motor shaft, similar to how pulleys are mounted on stepper motors.


2

You basically are asking about acoustics (see http://www.cs.tut.fi/~sgn14006/PDF/L02-acoustics.pdf). The main parameters you are dealing with you can see in the simple harmonic model: flexibility (spring) and mass. Thinner walls gives you more spring and less mass. Different filament materials will also change these parameters. On thing to consider is ...


2

In space, no one can hear you scream. That's because there's no air to be vibrated, which is part of the definition of sound. In the case of your model, the described diaphragm will generate sound because it is surrounded by air. The vibrations in the air will transfer (and reflect) from the PLA shell you've created. In order to hear as much sound as ...


2

As a supplement to the answer (doesn't fit well in the comments). This site https://www.filamentive.com/chemical-resistance-of-3d-printing-filament/ lists PETG has have a very high restance to alcohol, a high resitance to fuel Is PETG UV Resistant? In the long run, it is now a well-known fact that it will almost always come out on top when it comes to ...


2

Let's distinguish first three things: Hygroscopic behavior. The ability of a substance to absorb water. Salt is very Hygroscopic. Watertight open-shell. A boat is watertight against water from below. But you can pour water into it. Putting a lid on seals such a body somewhat, but the gap allows water to seep in. Watertight closed-shell. A sphere is water ...


1

It might be possible to directly print something like this, however it might not be the easiest method. Let me unpack that a bit. The issue for 3D printed foams is that, even the low density foams, such as the ones from ColorFabb, still are fairly high density on the scale of foams. (they are about 50% as dense as solid filament when expanded. They are also ...


1

Not really. It's possible to 3D print in materials like TPE that are rubbery. In theory, one could print a sheet of the pattern and then wrap that sheet around a roller. That would be expensive, though, and I doubt TPE would absorb enough paint/ink to lay down an good and even coat. As pointed out in the comments,there is one of foaming TPU filament (...


1

The properties of the maternal are not what changes after you print. It is how you use the material. PLA and ABS prints aren't usually subject to +100 °C after printing. When PLA absorbs moisture it becomes brittle. PLA filament will break when trying to print. Your PLA print may be thick enough so that brittle doesn't cause a problem. However, this can ...


1

I did a lot of experimentation in this a couple years ago. The limitation on the sound is the amount of energy you can apply to the plastic, and the ability of the plastic to respond (move to) that energy. I ended up using epoxy to fasten a transducer directly to the plastic wall, and while the sound quality was not great (I could not have used it for ...


1

Having melted acrylic on various occasions, I can hazard a guess why FDM isn't popular with this material: not only does it give off an acrid odor, the melted material is sticky and viscous, likely too much so to make into filament or to print reliably if so made. Most acrylic materials are made by curing a liquid resin, either with a catalyst ("...


1

While I don't know of PMMA as a standard offering, I do know that a lot of the smaller entities will gladly accommodate custom requirements for the right price and an understanding that results may be inferior to their tried and true. My recommendation is to google "3D Printing Service" and find what's local. Local will hopefully mean you don't ...


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