Viewing profile — metal_am

That's pretty much the Feynman technique. It absolutely works.

MIPS is a one and done kind of thing for major impacts.

I'd love to hear some examples!

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.

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…

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.

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 int…

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…

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. I…

You're making me wish I still had access to a CMM. I wonder what the tolerances are on an iPhone.

Chamber heater is really nice for ABS

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.

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?

It must be. The part about minimizing the stepper motor power consumption is nonsensical. Steppers use the same current whether moving or stationary.

I definitely thought it was a ROS clone based on that first line.

Nicest light microscope I've ever used.

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.

Electromagnetic stirring is used in continuous casting for grain refinement. It’s also used sometimes in welding.

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 o…

Absolutely. Printed molds and forging dies with conformal cooling channels can decrease cycle times.

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 spac…

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 …

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 …

Peregrine from Oak Ridge National Lab does exactly this. Lots of other research papers about it too.

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.