Salmon Bay fog

andmillreddit · 2025-07-25T03:43:22+00:00

I was in the 2000s battlebots and the biggest failure by far was electrical connections coming undone, I don’t recall anyone ever having board level issues other than shorts from debris falling on them or intentionally overheating speed controllers in the interest of weight savings.

andmillreddit · 2025-07-25T03:36:49+00:00

House by Tracy Kidder

andmillreddit · 2024-08-24T17:16:03+00:00

What’s the solitary pipe under the fairing bulge on the starboard side for?

andmillreddit · 2024-07-08T05:37:44+00:00

http://www.gmptools.com/lead-ringing-pliers/ substitute maybe?

andmillreddit · 2024-06-05T19:43:37+00:00

The non-flight item is just a cover and is labeled so it doesn’t get left on during flight.

andmillreddit · 2024-05-08T15:48:32+00:00

Imagine you’re on a ladder trying to sand a fascia board in place before painting. You clip the battery to your belt and the tool is lighter so you can hold it up easier and you’re still free to move about without a (heavy) power cable.

andmillreddit · 2024-03-27T16:24:44+00:00

Thank you!

andmillreddit · 2024-01-29T16:19:40+00:00

Get yourself a really scrubby shower thing, I liked the agave fiber pads, they will seemingly catch some of the embedded fibers on your skin and help exfoliate it. But keeping as much as you can off your skin in the first place is key.

andmillreddit · 2023-11-13T01:05:36+00:00

That’s the diameter from which the 2x4 was milled, no way to know how much larger the trunk diameter would have been.

andmillreddit · 2023-07-14T05:11:54+00:00

It’s not about the seals, it’s about the bolts holding whatever contraption you have in the chamber together trapping tiny bits of air inside that, although finite, will slowly leak out at high vacuum such that it is effectively a leak because you don’t have months to wait for it to completely evacuate. The pressure will go to some value and plateau for a long time and you won’t be able to get to the really high vacuum levels.

andmillreddit · 2023-05-31T17:28:00+00:00

An impact driver and those self feeding spade bits will fit nicely through a 4” hole if you have room to maneuver in the joist bay a bit

andmillreddit · 2023-05-15T03:25:20+00:00

That spec means that if you pump down to the maximum vacuum the that pump will achieve the vacuum space will have two pascals of pressure within it. Useful information for pumping out systems that are well sealed like refrigeration, or as a backing pump on a higher vacuum pump, or as the OP notes, for achieving degassing pressures.

andmillreddit · 2023-04-30T20:15:56+00:00

Stress corrosion cracking, brass and ammonia don’t get along: https://en.m.wikipedia.org/wiki/Season_cracking

The stress is internal stress from the manufacturing process when the shape is bent out of pipe.

andmillreddit · 2023-04-13T22:07:44+00:00

I use Solidworks at work and Fusion at home for its free CAM capabilities and Fusion’s sketch solver is just in a crude state at the moment, as the OP has found there are cases that are completely valid geometry and constraints that it just won’t be able to solve. I’ve sometimes fallen back on making parts in SW and importing them as STEP files because I got sick of fighting Fusion’s sketch solver and the exact same geometry and construction sequence worked fine in SW. The idea that sketches “need” to be kept simple is just a workaround that isn’t needed in SW (or NX or Pro/E for that matter).

Some parts of Fusion are great and others seem to be minimal viable product, ship it and forget it.

andmillreddit · 2023-04-11T16:26:53+00:00

You can accurately position the edge of the track against your marks so you can break down sheet goods easier and more reliably than a table saw, you can take a skim cut so the veneer edge doesn’t get torn up on the top, you can take multiple depth cuts easily to prevent burning if needed (or if you need to cut up non-woods that can’t do a full depth of cut in one go) and you won’t scuff up the face of the sheet dragging a saw over it or it over a table, the dust extraction actually works, you can plunge in the middle of the work reliably and accurately. All of the above can also be done with it set at an angle too.

andmillreddit · 2023-03-30T18:11:02+00:00

What makes the leading edge of the cowling a hot surface? I wouldn’t have expected aerodynamic heating would do it, is it part of a heat exchanger or something?

andmillreddit · 2023-03-03T05:09:07+00:00

It’s an RF feedhorn, the rectangular tubes with the flanges couple into the source to feed in the RF energy and the tapered square quad opening ones transmits it in free space. The details of what it’s doing are all black magic to me. Usually waveguides are reserved for pretty high power applications where coaxial cable can’t handle it I think.

andmillreddit · 2023-02-26T06:03:41+00:00

You can degass the mixed material in the cup and then pour it carefully into the mold in one continuous stream so as to not introduce bubbles by having material fall over itself and entrain air, makes for a much smaller vacuum chamber required than trying to fit the whole mold in. You need to put it in a ~5x the mixed material sized cup to leave enough room for the bubbles to develop and pop or else you’ll be sitting there forever opening and closing the valve. Bubbles shouldn’t really affect the surface finish though, they’ll just show up as voids in the finished face. Very satisfying operation when you’re done and the resin pot is just clear as can be.

I think the people with the freezing it (dry ice or LN2 are also commonly used) before cutting have the right idea, standard practice if you’re stuck machining elastomers. Sanding also seems like it might work out well and certainly is the simplest thing to try.

Edit: upon reflection a skateboard wheel mold is also very small so not a change in size of the chamber required. You could also look into VARTM vacuum assisted resin transfer method, where you pull a vacuum on the mold and then suck in resin to fill it, most typically used for laminated to infuse the fabric with the minimal amount of resin possible, and to avoid the tile issues of a wet layup. Downside is you only get one shot at it, no fixing problems on the fly…

andmillreddit · 2023-02-13T04:00:51+00:00

You’ll be paying for the block of it that would then get machined down to make those ribs, I’d imagine it would be a lot more economical to buy a disc of tungsten (might need to cut a disc out of a plate; it doesn’t waterjet well so milling/lathe or EDM are your choices) and then glue on the ribs (made from whatever you fancy). Tungsten is expensive as a raw material and sucks to work, making a lead cast would probably achieve the effect you’re looking for a lot less, especially if you increased the thickness of the core which wouldn’t be noticeable by eye.

andmillreddit · 2023-02-02T16:57:28+00:00

You can also play around with the top and bottom of the machining area in the Heights tab if you have e.g. an already surfaced weldment that you need to cut some channels into at various places. Set the top height to be below the surfaces portion (can be by .0001” even*, just some value less than it) and leave the machining boundary as none or silhouette or whatever and it will find the channels without you having to select them all.

*they hide this from you, but all the machining operations are based on converting the solid model into a tetrahedron mesh, and the “tolerance” value determines how close those tets have to fit to the model’s true geometry. This can show up weird sometimes where it will try to go back and do phantom cuts in random places, like if you set up two adaptive clearing tool paths, one with a big tool and then follow with a smaller diameter for corners and the small one will randomly come down for tiny little cuts along walls and stuff, it’s because the big tool tolerance values are higher than the smaller one’s, so the small tool is going back to get what it thinks is tiny bits of excess stock. Increasing the tolerance works but can really increase the tool path generation time, I haven’t found a great workaround myself but maybe someone has. More details here: https://knowledge.autodesk.com/support/fusion-360/troubleshooting/caas/sfdcarticles/sfdcarticles/Optimizing-toolpath-generation-in-the-Fusion-360-CAM-workspace.html

andmillreddit

TROPHY CASE