metal_am

7 ms·

1.
by metal_am 1mo ago
That's pretty much the Feynman technique. It absolutely works.
2.
by metal_am 3mo ago
MIPS is a one and done kind of thing for major impacts.
3.
by metal_am 7mo ago
I'd love to hear some examples!
4.
by metal_am 10mo ago
Developed film has a bar code type of encoding for DX info. The talk about the whole roll is the ability to scan the entire thing in one go vs having to load in multiple strips.
5.
by metal_am 11mo ago
This is a very surface level analysis like saying that the automobile was just an iterative improvement over a horse. Or a computer is just a better abacus. Fundamental research is all about diving into the weeds and finding new problems to
6.
by metal_am 11mo ago
If you found one for that price with the controller and pendent, please send me a link. I’ve looked a lot and have not seen any UR for remotely that cheap.
7.
by metal_am 1y ago
Looks like spot melt laser powder bed fusion (L-PBF). Electron beam doesn’t make sense for something on a smaller scale like this; it wouldn't have the resolution. Spot melt is interesting. Renishaw is the only manufacturer I’m aware o
8.
by metal_am 1y ago
I have both a resin and FDM printer. The FDM is hands down easier to work with than dealing with resin. FDM ABS is also a far better material than ABS-like resin. (Disclosure: I've never tried a proper industrial resin from LOCTITE or
9.
by metal_am 1y ago
I've been very happy with my Qidi Q1 Pro. I paid about $350 pre-tax off Amazon almost a year ago (Black Friday). For me, it was the most machine for the lowest cost I could find. It almost fits your desired print volume (245 x 245 x 24
10.
by metal_am 1y ago
You're making me wish I still had access to a CMM. I wonder what the tolerances are on an iPhone.
11.
by metal_am 2y ago
Chamber heater is really nice for ABS
12.
by metal_am 2y ago
That's how grad degrees are done. But there's simply not enough time to do this at an undergrad level with potentially hundreds of students.
13.
by metal_am 2y ago
Interesting. I haven’t heard of them. Joining would still be a problem for a bike frame. Any idea on how well they work with other severe plastic deformation processes?
14.
by metal_am 2y ago
It must be. The part about minimizing the stepper motor power consumption is nonsensical. Steppers use the same current whether moving or stationary.
15.
by metal_am 2y ago
I definitely thought it was a ROS clone based on that first line.
16.
by metal_am 2y ago
Nicest light microscope I've ever used.
17.
by metal_am 2y ago
Where I’m located, Supercharger prices are ~4x business electric rates. That’s something like $15 profit per charge. No idea on infrastructure costs or usage though.
18.
by metal_am 2y ago
Electromagnetic stirring is used in continuous casting for grain refinement. It’s also used sometimes in welding.
19.
by metal_am 2y ago
Most forms of metal AM require melting, which gives solidification microstructures. There are solid state (no melting) forms of metal AM though. Look up AFSD. MELD just got (part of) a billon dollar contract from the air force for it.
20.
by metal_am 2y ago
Absolutely. Printed molds and forging dies with conformal cooling channels can decrease cycle times.
21.
by metal_am 2y ago
A line has to be drawn somewhere because this is a rabbit hole. Without going into the specifics of ASTM standards, etc., there are metal AM parts flying today in both air and space. IMO, that counts as meeting standards.
22.
by metal_am 2y ago
Texture (the statistical arrangement of all the crystal lattice arrangements that make up a metal) can play a role on mechanical properties, but current metal AM is more than able to meet material standards. It's good to be careful wit
23.
by metal_am 2y ago
I know for certain that defects in the powder layer can be fixed in binder jet by redoing the recoater. There has been talk in the research world about being able to fix errors in L-PBF but I’m not sure they’ve gone past the research stage.
24.
by metal_am 2y ago
Peregrine from Oak Ridge National Lab does exactly this. Lots of other research papers about it too.
25.
by metal_am 2y ago
It might sound a little wild, but a huge amount of research has been put into getting metal AM parts to be “born qualified.” L-PBF is getting to be a fairly mature technology.
26.
by metal_am 2y ago
Just because something is reflective in the visible light spectrum doesn’t mean it’s reflective for the laser’s wavelength.
27.
by metal_am 2y ago
Laser powder bed fusion (L-PBF) is the more standardized term. DMLS was a trademark.
28.
by metal_am 3y ago
I’ll bite. The capability in the US to do large castings and forgings is basically gone. Good luck getting anything with a lead time of less than a couple years. In some cases, it simply can’t be done. That’s why we’re seeing so much invest
29.
by metal_am 3y ago
Pretty much! Also like an electron microscope. TWI says they can do 100kW
30.
by metal_am 3y ago
It's both. "The new two-stage High Pressure Turbine section adds advanced coatings for cooling metal parts that will enable the same metal temperatures as today’s engines despite hotter gas path temperatures." https:/&#

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