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Comment Re: Pinball machines are still made (Score 1) 42

"All the time? Low overhang speeds + fan with overhang. Not tricky."

If you have printed parts with horizontal holes which were not relieved on top, and you printed them in PETG, then you either had sag, or poor layer adhesion due to insufficient temperature. That's a huge percentage of why people still print in PLA. (Another big part is that it's so much cheaper than PHA.)

Comment Re:Pinball machines are still made (Score 1) 42

You've never printed anything with a horizontal hole?

All the time? Low overhang speeds + fan with overhang. Not tricky.

So what? Your average colored PLA has additives in it anyway.

Not remotely the same. Black is carbon black. Basically soot. Tiny amounts. White is titanium dioxide (like in sunscreen - just a mineral). Blues and greens, generally like 1% or so copper phthalocyanines (very stable, sort of like humus, *very* slowly give off copper (an essential micronutrient) as they break down over hundreds of years). Name a colour that you think is bad as "a double digit percentage of the entire volume of the plastic turning into PU / acrylic microplastics". When you have that much persistent additive, you don't want the plastic breaking down - if not recycled, then you want it incinerated.

It reduces it, it doesn't eliminate it. Try actually printing some PLA+.

Yes, I've totally never printed PLA+ before *eyeroll*.

Bambu PETG Basic vs. Bambu PLA Tough:

Max overhang angle: 70C vs. 55C (PETG wins)
Max bridging length: 30mm vs. 30mm (Tie)
Melting point: 225C vs. 151C (PETG wins)
Glass transition temperature: 68C vs. 61C (PETG wins)
Heat deflection temperature 1.8MPa: 65C vs. 58C (PETG wins)
Heat deflection temperature 0.4MPa: 69C vs. 61C (PETG wins)
Young's Modulus (XY): 1460MPa vs. 1860MPa (depends on whether you want high or low, as per the application; the Tough PLA is somewhat stiffer than PETG, though not as much as regular PLA)
Young's Modulus (Z): 1120MPa vs. 1920 MPa (same story)
Tensile strength (XY): 48MPa vs. 34.9 MPa (PETG wins solidly)
Tensile strength (Z): 39MPa vs. 20.9 MPa (PETG wins even more because PLA has *worse* layer adhesion)
(Skip bending modulus and bending strength, as they're derived parameters)
Impact strength (XY): 52.7 kJ/m2 vs. 80.6 kJ/m2 (Finally, something the PLA wins on!)
Impact strength (Z): 13.6 kJ/m2 vs. 25.9 kJ/m2 (Same)
Flammability: Flammable and self-extinguishing vs. just flammable (PETG wins)
Cost: Depends on the store, but Bambu's base price is cheaper (and I buy filament wholesale, and there's a pretty stark difference in price, with PETG at the factory door in China being under $4/kg, and even plain PLA being over 5$/kg)

So I have no idea why so many people are stuck on PLA.

Comment Re:Pinball machines are still made (Score 0) 42

I've never experienced any sort of "sagging" with PETG, and honestly don't even know what you mean by that

You've never printed anything with a horizontal hole?

To get PLA to be "tough" (impact resistant) on the order of PETG you have to load it up with PU microplastics, which makes it worse for the environment than PETG so you lose that advantage.

So what? Your average colored PLA has additives in it anyway.

And it gets rid of its stiffness

It reduces it, it doesn't eliminate it. Try actually printing some PLA+.

Comment Re:Thanks to Trump (Score 1) 106

I'm no highly respected scholar on the middle east like you clearly are but a nuclear-armed terrorist-state doesn't tickle my happy places.

OK, but enough about the US and Israel. Iran is not and never has been a nuclear power. The US nuked Japan twice just because it would be a shame not to use both bombs.

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