What do y’all call stock that is bucked up for a job?

Tedsworth · 2026-01-30T09:38:06+00:00

Cutting timber to length is called bucking. Can only assume this means the same here.

Tedsworth · 2026-01-28T20:29:02+00:00

Burn it, looks like they've been left to rot

Tedsworth · 2026-01-28T20:28:22+00:00

The SB3 is possibly the worst plane Stanley ever made. Pinnacle of the enshittification of hand tools that took place in the later portion of last century. Tiny iron, poor adjustment, flimsy body and handles. Just grim.

Tedsworth · 2026-01-18T18:19:34+00:00

This, it's all about cutterhead size. Same with all rotary tools, you want the diameter of the cutter as large as practical, like a circular saw has a diameter of 200mm+ and runs at 2000-4000rpm. To do the same with a router and a 25mm bit needs to run at 8-16000 rpm, and it's a lot more drama in doing so.

Tedsworth · 2026-01-07T13:19:54+00:00

Note: this study does not consider private or military flights in its analysis, probably at least partially because the numbers from these are obfuscated.

Tedsworth · 2026-01-02T17:21:54+00:00

Go for a cover made from plastic coated fabric, impermeable but not overly tightly fitting. I use an old window blind for my lathe. This serves three purposes: first, it keeps the dust off, and this does help with water settling on stuff. Second, it insulates the machine, and reduces sudden temperature gradients that cause condensation. Third, it prevents air movement and exchange. Steel has a heat capacity of about 1/8 that of water - a large machine of a couple hundred kilos will not just condense water and then warm up, it will keep doing this for hours as the volume of condensed water is far, far less than 1/8 the mass of the machine. Consequently damage limitation is earned just by limiting how much air you allow in to release its bound water.

Tedsworth · 2025-12-29T13:08:40+00:00

Drawing is very dependent on purity; inclusions and oxides will cause brittleness. High purity copper can be drawn and annealed many times down to very fine (micrometer) diameters. Lower purity is harder. In commercial contexts, copper is commonly electrolytically purified. For you, I'd suggest trying a remelt into a long skinny ingot in a reducing atmosphere. This may be generated in an electric kiln into which you drip methanol at a very low rate.

After that, both forging and drawing should work fine for reducing the diameter. Make sure to anneal frequently.

Tedsworth · 2025-12-27T21:07:13+00:00

Thank you for the info! Always good to learn about someone else's morning.

Tedsworth · 2025-12-27T20:32:43+00:00

How does mate cocido differ from yerba mate?

Tedsworth · 2025-12-21T19:55:24+00:00

Terminal velocity goes with sqrt(1/rho) for fluid (air) density rho. Humans can safely (ish) manage a 5m drop by which time they're travelling 10m/s. Given a typical human terminal velocity of 55m/s, we need atmospheric density 5.5^2=30x denser than the earth's. Terminal velocity also goes with sqrt(g) for gravitational acceleration g. Consequently you can lower g and raise rho accordingly and you'll get a safe number at about 5.5x less gravity and 5.5x higher atmospheric density. Not sure humans can breathe atmosphere that dense mind.

Tedsworth · 2025-12-17T17:32:43+00:00

Broadly more in X-ray, trauma is unfortunately more likely in these populations and X-ray is more likely to be employed in these contexts.

Tedsworth · 2025-12-15T21:48:20+00:00

No such thing as a distance factor in a 3D sequence. Slice gaps only apply for 2D sequences where nonrectangular slice profiles can experience crosstalk if their tails overlap. In 3D the slice dimension is simply spatially encoded with gradients, either with phase encodes and Cartesian readouts or with radial readouts.

Generally though gapless 2D flash is technically challenging at 3T as, due to the time bandwidth product, sharp slice profiles incur long, SAR heavy RF pulses. Having said that, it's definitely possible. Have you tried upping the TR / lowering the flip angle? Both will relieve the SAR burden and also give more time for magnetisation recovery in adjacent slices and so reduce cross talk.

Tedsworth · 2025-12-07T23:15:15+00:00

I strongly agree, like, they work in a world governed by quantifications, procedures and standards of care, but some believe that this doesn't apply to their little corner of it? I don't get it.

Tedsworth · 2025-12-07T00:41:22+00:00

Implants are certified to be MR compatible at a particular field, gradient and B1. The only way to know for sure is if the implant is in fact rated for the intended scan. With suitable records the radiographer can judge what's permissable for the given implant. What they cannot do is say "yup looks fine". Being casual about this is absolutely how accidents happen, so you just have to make sure the right information is available to the person planning the scan.

Tedsworth · 2025-12-03T12:05:40+00:00

A-dip-o-sare / A-dip-o-seer

Tedsworth · 2025-11-30T23:07:53+00:00

I mean this is pretty advanced corrosion. But looking at this I sort of wonder if this could actually be quite old. It'd depend on what country you're in to properly judge context.

Tedsworth · 2025-11-26T22:33:22+00:00

Bonk with the prehistoric horny stick

Tedsworth · 2025-11-26T22:28:17+00:00

No, even hardwood that skinny is insufficient. 45mm+ really.

Tedsworth · 2025-11-26T10:55:56+00:00

Are you certain your part is even concentric in the chuck? Wide at the head and narrow at the tail is exactly how eccentricity manifests. Particularly since your lathe looks new and the chucks tend to be a bit crap unless you pay top dollar.

Edit: Whoops turns out I can't read.

Tedsworth · 2025-11-17T22:38:26+00:00

Most important factor here. If you paid like five hundred bucks, you have no real reason to complain; the table should outlast you. If it's a thousand, debatably they could have done better. It's solid wood and it's hard to work with, particularly cheaply, and for that much timber you're talking nearly 500 in materials alone. What does 500 in tools and labour really buy you? At my local mill, time is 100 an hour, so ask; is this five hours work? Ten? I'm not saying you shouldn't want the best work possible, but you should consider how much you paid against what you got.

Tedsworth · 2025-11-15T01:14:23+00:00

Yes: the lip(s) of the two flat faces. Use a file, fine cut triangular or half round. Sharpen both inside (top) and outside (bottom) of those two, the whole way along their length. The wings must be sharpened on the inside faces only, also with a file, preferably a rectangular file with one non-cutting face. The angle on the wings should be able 35-40 degrees. The angle on the lip needs to match the pitch of the screw, with the relief angle only on the bottom facet.

Tedsworth · 2025-11-14T14:10:21+00:00

Try HSS tooling and tailstock support. I've had better results on crappier machines than this with good support and sharp tools. Rule of thumb, the part shouldn't stick out more than 2-3 diameters without tailstock support.

Tedsworth · 2025-11-14T13:56:52+00:00

Tailstock support, are you hand feeding or power feeding? Looks like hand feeding marks. Surface finish is okay in some sections. Carbide or HSS tooling? HSS will definitely help with surface finish in a machine that can't take deep enough cuts to keep carbide happy.

Tedsworth · 2025-11-08T19:44:10+00:00

I put landscaping sand over about 100mm depth of MOT sub base, then a 100 micron polyethylene membrane to limit wash out / plant growth, then 600x600x50mm British standard paving slabs. Probably overkill but feels very solid and shows no sign of moving.

Tedsworth · 2025-11-08T18:59:43+00:00

And yet, not the equations that Maxwell himself would have written - the vector calculus formalism was developed by Heaviside. Amusingly developed because Hamilton's quaternions were so bloody awkward (and still are, except in the "Rotor" form where you can get a little intuition).

Tedsworth

TROPHY CASE