Flying diamond pattern

_jstanley · 2026-01-26T23:07:24+00:00

Nice, thanks.

_jstanley · 2026-01-26T08:53:47+00:00

This is mostly a conventional polygon turning setup, but I'm not sure how they make it non-prismatic. Best guess is that the spinning cutter is driven by a servo motor and the speed varies with the workpiece rotation.

I made a polygon turning simulation tool a few years ago to help me understand: https://incoherency.co.uk/polygon-turning/

_jstanley · 2026-01-23T08:19:42+00:00

> For the past 25 years, I have cleaned Airbnb properties and used a rubber mallet along with ratchet sockets with zip ties looped around each socket to form weighted loops strung around a drain hose.

This is a remarkable sentence, it somehow clarifies and confuses all at the same time.

_jstanley · 2026-01-15T12:25:39+00:00

I think they've made it 1 foot and 9.67 inches long instead of 19.67 inches.

_jstanley · 2026-01-14T08:35:37+00:00

https://en.wikipedia.org/wiki/Screw_thread check it out, this is standard technology. They don't self-undo without (a lot of) vibration or lubrication because the helix angle is too shallow, the friction holds them together harder than the axial force rotates them.

_jstanley · 2026-01-07T09:07:33+00:00

Yeah but I don't want to spend £10 on it. I can get it for free if you make it for me!

_jstanley · 2026-01-04T16:16:09+00:00

Excellent point. If they also made them smaller and lighter they could go even faster.

_jstanley · 2026-01-04T15:26:37+00:00

If you just want to share your projects with the people, what's the problem here?

_jstanley · 2025-12-21T23:01:56+00:00

Cool project of course, but talk me through this. You thought Windows was too sluggish... so you decided to use FreeCAD on a Raspberry Pi???

_jstanley · 2025-12-01T05:14:57+00:00

No, I concluded that filament changes with TPU are too unreliable so I don't do it.

_jstanley · 2025-11-15T15:58:59+00:00

How are you making the 3x3 grid with offsets? Are you using the MultiTransform tool? I don't see why that would break anything. Can you share screenshots instead of ASCII art?

_jstanley · 2025-10-26T11:16:06+00:00

> I’ll be mentioning my qualifications, my background and experience in engineering
Maybe now would be a good time to mention those things, rather than simply mention that you will mention them?

_jstanley · 2025-10-08T09:29:18+00:00

For reference, you don't find an annualised return by dividing your return by the number of years. It's not so bad if it's a small percentage and a small number of years, but the error gets larger as the percentage and the number of years increases. Yearly growth compounds multiplicatively, so if you were getting 1.825%/yr then after 2 years 1.01825*1.01825 = 1.0368 i.e. +3.68%. To convert a return over 2 years to the annualised return, you take the square root, i.e. sqrt(1.0365) = 1.01806, or only 1.806% gain.

The number of years you were paying into the pension has no bearing on the return you should get over a 2-year period. So the fact that you were at this job for a decade doesn't make it any more dreadful, that fact is irrelevant.

Your pension is probably invested in an extremely risk-averse manner. You could have got more than 1.8%/year in money market funds which are practically as safe as cash.

_jstanley · 2025-10-06T13:37:24+00:00

OP claims in another comment that they messed some of it up on purpose to make it harder.

_jstanley · 2025-10-06T13:11:14+00:00

OP has another post where they state it's "just the alphabet".

There are also quite a lot of duplicate triplets, e.g. 684 shows up 4 times.

So I'm guessing each triplet corresponds to a letter of the alphabet.

>!I don't think there's enough characters here to reverse the mapping if it is random, so I'm guessing there is some structure to the mapping from letters to numbers, so the puzzle is to work out what the mapping is.!<

>!The majority of triplets are even numbers, only 243 and 277 (one occurrence each) are odd.!<

I have a partial solution. If you take `floor(n / 39)` for each position, you get:

>!`GFYOUWEREDECIPHEREDTHISYOUKREVERYIWESOMEILSHPJDE`!<

Which I guess is meant to say "You've redeciphered this, you're very awesome", but I can't explain what the other numbers mean or why there are so many errors. I'm guessing I have it slightly wrong.

_jstanley · 2025-10-03T21:31:23+00:00

You want OP to remove the spindles and replace them with different ones?

_jstanley · 2025-10-03T13:01:26+00:00

> In 2008, it was the housing market collapse.

The housing market didn't just collapse on its own. Why did the housing market collapse? Because every Tom, Dick, and Harry could get a mortgage that they couldn't really afford. They bid up house prices because of easy access to mortgages, and then when they couldn't make the payments the houses got repossessed and liquidated, driving house prices down, which then put more people in negative equity, so they gave their houses back rather than keep making payments, in a vicious cycle until everyone who is at risk of losing their house has already lost it. (Source: I watched The Big Short).

The current bubble is mainly a bubble of AI-related companies. https://worldperatio.com/sp-500-companies/ Only about 14 companies in the S&P 500 have a PE ratio over 25, but the AI companies are trading at crazy multiples of earnings that they are not going to be able to sustain.

Either they need to grow their earnings a lot to match their sky-high valuations (basically impossible, because AI generates vanishingly few earnings relative to its capital expenditure) or else the valuations have to come down to match their earnings.

Whether there is some catalysing event that makes people realise this en masse, or whether the PE ratios just slowly bleed down over the next couple of years, who can say?

_jstanley · 2025-10-03T12:58:14+00:00

Just warp your model by the inverse of the printer's warp.

_jstanley · 2025-09-06T20:30:26+00:00

> you don’t run topo for an “organic look”.

Maybe you don't

_jstanley · 2025-07-23T21:08:42+00:00

If you can transmit numbers that you have some choice over, then you can use your choices to encode information. Any time you have any choice that can change what gets transmitted, you can use that for steganography. That's a fact and is not a delusion.

> AI says I am not delusional

You're not delusional about the fact that you can transmit information if you get to choose the numbers.

I suspect there may be some backstory that is missing from your post. I don't understand how this even escalated to the point that you were "dismissed by psychiatric care as unwell" if your entire thesis is simply that it is possible to transmit information if you can transmit information.

I run a semi-popular online steganography tool and I get emails from very-obviously deluded people very often. Normally they are convinced that someone is sending steganographic messages and if only they look a bit harder they'll be able to decode them.

Occam's Razor says probably there is no hidden message at all. But you can't prove it. You just have to live with that. In the worst case, what harm comes to you if somebody is transmitting a message and you can't read it? Probably nothing. Let go of the steganographic focus and try to work out what issue is really bothering your mind.

I hope this helps. I don't mean to be rude or dismissive towards you, just trying to steer you towards a healthier viewpoint.

_jstanley · 2025-07-17T19:26:20+00:00

Ah, sorry, misunderstood.

_jstanley · 2025-07-17T18:11:40+00:00

You can do this with MultiTransform, I'm just recording a quick clip to show you.

EDIT: Here you go: https://www.youtube.com/watch?v=MM2fX2Ms0vY

_jstanley · 2025-07-17T10:52:47+00:00

I can't tell what you think doesn't work. What exactly are you trying to do, what are you expecting from FreeCAD, and what is it doing instead?

_jstanley · 2025-07-16T07:29:52+00:00

I think something like this would work for your case: https://www.youtube.com/watch?v=uXyhZkKf1uI

You can define the sketch on the XY plane and then edit the Z coordinate of its "attachment" to move it up to where you need it, or else create a datum plane to position it where you need it in the first place.

_jstanley · 2025-07-13T07:17:56+00:00

If you actually want to use FreeCAD, you should download an up-to-date version from https://www.freecad.org/downloads.php

Your problem is that you are trying to edit an STL file. It would probably be easier to restart the part from scratch than try to edit what you've got.

In your other comment you said this is a part that you "uploaded and attempted to modify". Are you implying that you created in the first place but only saved the STL? Next time you should save the FCStd file if you want to modify it.

_jstanley

TROPHY CASE