Weird #3dPrinting question I've been thinking about.
Would the left side print faster? (Assume that both discs in the photo below are the same diameter and height.)
My assumption is that it would. The print head could accelerate during the chunky segments but the right side would be constantly changing directions, so no acceleration.
If it would be measurably faster, I'm not sure. I need to do some testing, but it's interesting to go against years of optimization in the other direction.
I doubt it. The larger the facets the larger the included angle and the more it needs to slow down between facets.
It's not just segment length, it's the angle between the segments.
The details depend on what firmware you are running. In Marlin, this is directly set as "junction deviation" and in klipper it's set with square_corner_velocity. from which the junction deviation is derived.
Don't fight your years of optimization making better parts. ☺
Here is the Klipper issue that covers Grbl and Smoothieware and why the setting is different in Klipper.
Marlin's junction deviation documentation is lighter in detail. I do remember configuring that by trial and error until prints looked OK to me back before I moved to Klipper.
Do you really want a faceted “cylinder” to save a little bit of time? I just think you’d look at the finished print and immediately think “Boy, that was quick, but I wish it was smoother.” 🤔
Agreed. In a related way, there’s an “image quality” setting in SolidWorks that controls how smooth arcs are displayed. Most of the time, this doesn’t matter because the objects we’re working with are relatively small. When I have to model a large tank or similar, you can really start to see the facets. If there are two concentric cylinders close together, it will look like they interfere because facets will overlap. Messes with your head at first.
When you have two different geometries joining with different with a different number of facets you get some pretty strange problems. The corners can’t quite align. In a 3d print? Not a problem. I can see in industrial applications it could be a big ass problem if it wasn’t just an artifact of an image quality setting.
(I actually like the look of lower facets in some more shiny filaments like this example)
Fortunately, it’s just a graphical artifact. When it happens, I usually just turn up the quality setting from the default until it looks right. We’re not talking complex geometry here, usually just cylinders.
I never really thought about it on the printing side because I’ve been using STEP files for so long in slicers and also running my G-code through ArcWelder to produce true circular moves. It could definitely be a problem otherwise!
PLEASE SHARE: Great opportunity for people starting out. Free Desk space or Free Workshop space for 6 months.
It’s time to launch the process for the next round of Boost Membership. This would be the cohort that will have their membership from April 2025 – September 2025. doesliverpool.com/co-working/s…
If you came of age in the 1990s, you’ll remember the unmistakable auditory handshake of an analog modem negotiating its connection via the plain old telephone system. That cacophony of screec…
More and more of the ‘smart’ gadgets like watches and phones that we carry around with us these days come with features that we’d not care to ever need. Since these are devices th…
There is no #cloud, only other peoples' computers. As @pluralistic says "It’s funny because it’s true and the 'other people' in this case are rapacious, vertically integrated monopolies."
I don't click on URL shortener links. And I'm actually going to say something this time, because you are using one to point to a supposed privacy tool. (I say supposed, because I only have your word for it and an opaque URL.) And, thus, you have opened yourself up for this criticism.
Please do not use URL shorteners, of any kind for any reason. If you value privacy and computer security, do not click on links for URL shorteners.
@jackwilliambell Hi Jack! I understand your reticence and the traditional issues with third-party link shorteners. But we host this link shortener ourself! Precisely because we don't want to use a bit. ly etc. Cheers 😀
So I should trust it because you say so? Who trusts you?
Because, from where I stand, you're just another Internet rando.
Please try to see it from my viewpoint and then find a way to make the trust you demand from me something that is verifiable by me. Perhaps a trusted-by-me third party can speak for you? (I trust @pluralistic, for example.)
Trust is not easily earned and should not be easily given.
(BTW: I still won't click on a link shortener, even so.)
@jackwilliambell Sure, I can't force you to trust me. When did I try to do that?
A URL to a web server I run is a URL to a web server I run. Whether it is a 301 redirect or not, or what length it is, has nothing to do with privacy or trust. An HTTP request is an HTTP request and can be logged by the server.
Here are two direct links to apps I hope people will trust enough to use, but if that is not you, that is okay 😀
And… this is interesting. What does this say about the level of anonymity of votes in Mastodon polls? I always assumed at least some of the instance admins would be able to deanonymize votes, but if votes are somehow analagous to statuses does that imply random users could snoop who voted how…?
Pitch Mastodon allows multiple-choice polls; e.g., selecting more than one choice is allowed. However, these polls reject an attempt to vote for 0 of the options. In many types of poll, that may be...
No. Evan's comment describes the inter-server protocol. Other users have no way of accessing these individual votes, on the voting server nor the poll server. Admins with database access can plainly read individual votes on either of the two servers.
PieFed came up with an interesting system last year that scrambles user IDs for votes to anonymize them, so the voting user's server would still know their specific votes, but the poll server would not. This has not yet been added to Mastodon.
So this is almost like Matrix where any room participant can read individual poll answers, even historical ones after a user changes their mind (except here it’s gatekept to only admins, but a random user can just run a single-user instance and become admin)
I feel like somewhere should be a disclaimer that poll answers aren’t really as private as they would seem. Similarly for blocks (Moshidon does say the blocked user sees that they’re blocked but most servers actually hide this)
@kimapr @julian My read of Julian's comment is that a third-party instance could not see individual votes, only the instance containing the voter and the instance tallying the votes ever have that information.
This is correct. @kimapr If you run a Mastodon server, you have access to (1) all votes for all polls started on your server, and (2) votes by people from your server on polls hosted elsewhere.
I didn't have room for it in my original reply, but it's worth clarifying that there's nothing except a social contract stopping an ActivityPub server from publishing all votes it knows. The whole "private voting" idea in PieFed started because mBin was publishing votes: piefed.social/post/205362
The Enigma machine is perhaps one of the most legendary devices to come out of World War II. The Germans used the ingenious cryptographic device to hide their communications from the Allies, who in…
"How Ridiculous added copious amounts of pneumatic air to inflatable objects to make them as large as possible before they exploded." laughingsquid.com/inflating-ob…
RFK Jr.: It Would Be Better if ‘Everybody Got Measles’
“It used to be, when I were a kid, that everybody got measles. And the measles gave you lifetime protection against measles infection,” he said, then taking a swipe at the vaccine. “The vaccine doesn’t do that. The vaccine is effective for some people for life, but for many people it wanes.” 🤦♂️
Can we please NOT give nazis megaphones? I mean, ~probably~ most of your followers know those are lies, but rather than quoting him directly in a way that might get amplified to people who don't know better, even just sticking in someone's head subconsciously, report on what they lied about:
"RFK called for everyone to get measles, citing a lie that getting it provides lifetime immunity and that the vaccine does not. In reality, getting measles destroy's the immune system's memory of past infections, rendering one susceptible to other deadly diseases."
Ooooooh! Cory Doctorow is planning a trip to NZ, with a Wellington event on May 3 or 4! I really enjoy all of his writing, so it will be great to hear him again!
Attached: 1 image
Today's threads (a thread)
Inside: Announcing the Picks and Shovels book tour; and more!
Archived at: https://pluralistic.net/2025/02/06/picks-and-shovels-tour/
#Pluralistic
1/
Each package includes the tax information, the return, related schedules such as schedule 1, provincial and territorial information and related forms.2024 income tax package,
Okay, I completed and mailed my taxes today, perhaps just in time for another Canada Post strike.
I included a note for the feds about how I’m doing it on paper this year because way too many “approved” services store Canadians’ personal tax info in the US. (I also circled in red ink the bad translation job on their envelope.)
I had to mail two separate larger-than-normal envelopes, so I slapped two “permanent” stamps on each one and am hoping that works out to $1.94 or whatever the current in-store postage amount is.
Will both packages arrive? Maybe. Are my numbers correct? Maybe. Are my principles and supporting documents correct? I’m confident in my case.
Buy one on Amazon: https://lon.tv/6rzeo (compensated affiliate link) - 8bitdo's budget controller got an update with their new 2C controller. These are avail...
Elon Musk and President Trump’s push to lay off federal workers may jeopardize the Federal Trade Commission's lawsuit against Amazon. pcmag.com/news/ftc-asks-judge-…
The FTC accuses Amazon of duping people into signing up for Prime. But it's hard to prepare for a trial when Elon Musk fires your attorneys and support staff.
Official HD Video for ”Da Mystery Of Chessboxin'” by Wu-Tang ClanListen to Wu-Tang Clan: https://Wu-TangClan.lnk.to/listenYDWatch more videos by Wu-Tang Cl...
Hm. If you draw a line on a map from the place you found this, back toward Manhattan and aligned diagonally with the Manhattan street grid. Does the line intersect any of those parks with public chess boards. If so, maybe you can extrapolate where it was going
Manga Musai no Reijou Jobu [Maou] de Juurin Suru (The Talentless Noble Lady Tramples On Everyone After Being Granted The [Demon King] Job) dalam Bahasa Indonesia
🔥 Pecinta Komik, Ini yang Kamu Tunggu! 🔥 Chapter terbaru dari Musai no Reijou Jobu [Maou] de Juurin Suru (Chapter 03) sudah hadir dalam Bahasa Indonesia! 🎉 📖 Gabung bersama ribuan pembaca lainnya dan nikmati kisah serunya. ✨ Jangan biarkan orang lain tahu kisah ini lebih dulu, baca sekarang dan rasakan sendiri keseruannya! 👉 Klik di sini untuk mulai membaca sekarang: e-komik.org/komik/441035 ⏳ Jadilah yang pertama tahu apa yang terjadi selanjutnya! #EKomik #Komik #Comic #Manga #Action #Drama #Fantasy #Shounen
Manga Musai no Reijou Jobu [Maou] de Juurin Suru (The Talentless Noble Lady Tramples On Everyone After Being Granted The [Demon King] Job) dalam Bahasa Indonesia
🔥 Pecinta Komik, Ini yang Kamu Tunggu! 🔥 Chapter terbaru dari Musai no Reijou Jobu [Maou] de Juurin Suru (Chapter 02) sudah hadir dalam Bahasa Indonesia! 🎉 📖 Gabung bersama ribuan pembaca lainnya dan nikmati kisah serunya. ✨ Jangan biarkan orang lain tahu kisah ini lebih dulu, baca sekarang dan rasakan sendiri keseruannya! 👉 Klik di sini untuk mulai membaca sekarang: e-komik.org/komik/441035 ⏳ Jadilah yang pertama tahu apa yang terjadi selanjutnya! #EKomik #Komik #Comic #Manga #Action #Drama #Fantasy #Shounen
Manga Musai no Reijou Jobu [Maou] de Juurin Suru (The Talentless Noble Lady Tramples On Everyone After Being Granted The [Demon King] Job) dalam Bahasa Indonesia
🔥 Pecinta Komik, Ini yang Kamu Tunggu! 🔥 Chapter terbaru dari Musai no Reijou Jobu [Maou] de Juurin Suru (Chapter 01) sudah hadir dalam Bahasa Indonesia! 🎉 📖 Gabung bersama ribuan pembaca lainnya dan nikmati kisah serunya. ✨ Jangan biarkan orang lain tahu kisah ini lebih dulu, baca sekarang dan rasakan sendiri keseruannya! 👉 Klik di sini untuk mulai membaca sekarang: e-komik.org/komik/441035 ⏳ Jadilah yang pertama tahu apa yang terjadi selanjutnya! #EKomik #Komik #Comic #Manga #Action #Drama #Fantasy #Shounen
Manga Musai no Reijou Jobu [Maou] de Juurin Suru (The Talentless Noble Lady Tramples On Everyone After Being Granted The [Demon King] Job) dalam Bahasa Indonesia
🔥 Pecinta Komik, Ini yang Kamu Tunggu! 🔥 Chapter terbaru dari Musai no Reijou Jobu [Maou] de Juurin Suru (Chapter 05) sudah hadir dalam Bahasa Indonesia! 🎉 📖 Gabung bersama ribuan pembaca lainnya dan nikmati kisah serunya. ✨ Jangan biarkan orang lain tahu kisah ini lebih dulu, baca sekarang dan rasakan sendiri keseruannya! 👉 Klik di sini untuk mulai membaca sekarang: e-komik.org/komik/441035 ⏳ Jadilah yang pertama tahu apa yang terjadi selanjutnya! #EKomik #Komik #Comic #Manga #Action #Drama #Fantasy #Shounen
Manga Musai no Reijou Jobu [Maou] de Juurin Suru (The Talentless Noble Lady Tramples On Everyone After Being Granted The [Demon King] Job) dalam Bahasa Indonesia
🔥 Pecinta Komik, Ini yang Kamu Tunggu! 🔥 Chapter terbaru dari Musai no Reijou Jobu [Maou] de Juurin Suru (Chapter 04) sudah hadir dalam Bahasa Indonesia! 🎉 📖 Gabung bersama ribuan pembaca lainnya dan nikmati kisah serunya. ✨ Jangan biarkan orang lain tahu kisah ini lebih dulu, baca sekarang dan rasakan sendiri keseruannya! 👉 Klik di sini untuk mulai membaca sekarang: e-komik.org/komik/441035 ⏳ Jadilah yang pertama tahu apa yang terjadi selanjutnya! #EKomik #Komik #Comic #Manga #Action #Drama #Fantasy #Shounen
Manga Musai no Reijou Jobu [Maou] de Juurin Suru (The Talentless Noble Lady Tramples On Everyone After Being Granted The [Demon King] Job) dalam Bahasa Indonesia
🔥 Pecinta Komik, Ini yang Kamu Tunggu! 🔥 Chapter terbaru dari Musai no Reijou Jobu [Maou] de Juurin Suru (Chapter 06) sudah hadir dalam Bahasa Indonesia! 🎉 📖 Gabung bersama ribuan pembaca lainnya dan nikmati kisah serunya. ✨ Jangan biarkan orang lain tahu kisah ini lebih dulu, baca sekarang dan rasakan sendiri keseruannya! 👉 Klik di sini untuk mulai membaca sekarang: e-komik.org/komik/441035 ⏳ Jadilah yang pertama tahu apa yang terjadi selanjutnya! #EKomik #Komik #Comic #Manga #Action #Drama #Fantasy #Shounen
Manga Musai no Reijou Jobu [Maou] de Juurin Suru (The Talentless Noble Lady Tramples On Everyone After Being Granted The [Demon King] Job) dalam Bahasa Indonesia
🔥 Pecinta Komik, Ini yang Kamu Tunggu! 🔥 Chapter terbaru dari Musai no Reijou Jobu [Maou] de Juurin Suru (Chapter 08) sudah hadir dalam Bahasa Indonesia! 🎉 📖 Gabung bersama ribuan pembaca lainnya dan nikmati kisah serunya. ✨ Jangan biarkan orang lain tahu kisah ini lebih dulu, baca sekarang dan rasakan sendiri keseruannya! 👉 Klik di sini untuk mulai membaca sekarang: e-komik.org/komik/441035 ⏳ Jadilah yang pertama tahu apa yang terjadi selanjutnya! #EKomik #Komik #Comic #Manga #Action #Drama #Fantasy #Shounen
Manga Musai no Reijou Jobu [Maou] de Juurin Suru (The Talentless Noble Lady Tramples On Everyone After Being Granted The [Demon King] Job) dalam Bahasa Indonesia
🔥 Pecinta Komik, Ini yang Kamu Tunggu! 🔥 Chapter terbaru dari Musai no Reijou Jobu [Maou] de Juurin Suru (Chapter 07) sudah hadir dalam Bahasa Indonesia! 🎉 📖 Gabung bersama ribuan pembaca lainnya dan nikmati kisah serunya. ✨ Jangan biarkan orang lain tahu kisah ini lebih dulu, baca sekarang dan rasakan sendiri keseruannya! 👉 Klik di sini untuk mulai membaca sekarang: e-komik.org/komik/441035 ⏳ Jadilah yang pertama tahu apa yang terjadi selanjutnya! #EKomik #Komik #Comic #Manga #Action #Drama #Fantasy #Shounen
Manga Musai no Reijou Jobu [Maou] de Juurin Suru (The Talentless Noble Lady Tramples On Everyone After Being Granted The [Demon King] Job) dalam Bahasa Indonesia
The surface shown in my last few posts can be described as a diagonal on the hypersphere. In this 🧵 I'll expand a bit on what I mean by that.
On a sphere we can trace 'loxodrome' curves of constant bearing, diagonal to the longitude/latitude directions, spiralling from one pole of the sphere to the antipodal one. en.wikipedia.org/wiki/Rhumb_li…
Stereographically projecting from the top pole onto a horizontal plane gives logarithmic spirals, where one of the poles projects to the point at infinity. However, if instead we turn the sphere on its side before projecting we get a family of beautiful double spiral curves which reveal the true symmetrical nature of the 2 poles.
What is the equivalent of these curves in one dimension up?
Instead of the familiar sphere in 3d space a.k.a. the 2-sphere (which can be parameterised with 2 coordinates, longitude and latitude) we now have the 3-sphere or hypersphere in 4d space.
Stereographic projection which maps the 2-sphere to the flat plane can also be generalised to higher dimensions, and it conformally maps the 3-sphere to our familiar Euclidean 3d space.
This projects Hopf coordinates to a triply orthogonal system composed of spheres, planes and nested tori. At one extreme the torus becomes a horizontal circle and at the other a vertical line (or circle through infinity) through its centre (see toroidal coordinates here mathcurve.com/surfaces.gb/trip…).
Large study shows drinking alcohol is good for your cholesterol levels There are many risks from drinking, but high cholesterol doesn't seem to be one. arstechnica.com/health/2025/03…
🔥 Pecinta Komik, Ini yang Kamu Tunggu! 🔥 Chapter terbaru dari Taida na Akujo Kizoku ni Tensei Shita Ore, Shinario o Bukko wa Shitara Kikaku-gai no Maryoku de Saikyou ni Natta (Chapter 07) sudah hadir dalam Bahasa Indonesia! 🎉 📖 Gabung bersama ribuan pembaca lainnya dan nikmati kisah serunya. ✨ Jangan biarkan orang lain tahu kisah ini lebih dulu, baca sekarang dan rasakan sendiri keseruannya! 👉 Klik di sini untuk mulai membaca sekarang: e-komik.org/komik/412237 ⏳ Jadilah yang pertama tahu apa yang terjadi selanjutnya! #EKomik #Komik #Comic #Manga #Fantasy #Harem #Isekai #Reincarnation #Shounen
🔥 Pecinta Komik, Ini yang Kamu Tunggu! 🔥 Chapter terbaru dari Taida na Akujo Kizoku ni Tensei Shita Ore, Shinario o Bukko wa Shitara Kikaku-gai no Maryoku de Saikyou ni Natta (Chapter 08) sudah hadir dalam Bahasa Indonesia! 🎉 📖 Gabung bersama ribuan pembaca lainnya dan nikmati kisah serunya. ✨ Jangan biarkan orang lain tahu kisah ini lebih dulu, baca sekarang dan rasakan sendiri keseruannya! 👉 Klik di sini untuk mulai membaca sekarang: e-komik.org/komik/412237 ⏳ Jadilah yang pertama tahu apa yang terjadi selanjutnya! #EKomik #Komik #Comic #Manga #Fantasy #Harem #Isekai #Reincarnation #Shounen
🔥 Pecinta Komik, Ini yang Kamu Tunggu! 🔥 Chapter terbaru dari Taida na Akujo Kizoku ni Tensei Shita Ore, Shinario o Bukko wa Shitara Kikaku-gai no Maryoku de Saikyou ni Natta (Chapter 09) sudah hadir dalam Bahasa Indonesia! 🎉 📖 Gabung bersama ribuan pembaca lainnya dan nikmati kisah serunya. ✨ Jangan biarkan orang lain tahu kisah ini lebih dulu, baca sekarang dan rasakan sendiri keseruannya! 👉 Klik di sini untuk mulai membaca sekarang: e-komik.org/komik/412237 ⏳ Jadilah yang pertama tahu apa yang terjadi selanjutnya! #EKomik #Komik #Comic #Manga #Fantasy #
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🔥 Pecinta Komik, Ini yang Kamu Tunggu! 🔥 Chapter terbaru dari Taida na Akujo Kizoku ni Tensei Shita Ore, Shinario o Bukko wa Shitara Kikaku-gai no Maryoku de Saikyou ni Natta (Chapter 09) sudah hadir dalam Bahasa Indonesia! 🎉 📖 Gabung bersama ribuan pembaca lainnya dan nikmati kisah serunya. ✨ Jangan biarkan orang lain tahu kisah ini lebih dulu, baca sekarang dan rasakan sendiri keseruannya! 👉 Klik di sini untuk mulai membaca sekarang: e-komik.org/komik/412237 ⏳ Jadilah yang pertama tahu apa yang terjadi selanjutnya! #EKomik #Komik #Comic #Manga #Fantasy #Harem #Isekai #Reincarnation #Shounen
Michael K Johnson
in reply to Kyle Davis • • •I doubt it. The larger the facets the larger the included angle and the more it needs to slow down between facets.
It's not just segment length, it's the angle between the segments.
The details depend on what firmware you are running. In Marlin, this is directly set as "junction deviation" and in klipper it's set with
square_corner_velocity. from which the junction deviation is derived.Don't fight your years of optimization making better parts. ☺
Michael K Johnson
in reply to Michael K Johnson • • •Here is the Klipper issue that covers Grbl and Smoothieware and why the setting is different in Klipper.
Marlin's junction deviation documentation is lighter in detail. I do remember configuring that by trial and error until prints looked OK to me back before I moved to Klipper.
Configuring Marlin
Sarf2k4Chris Huck
in reply to Kyle Davis • • •Kyle Davis
in reply to Chris Huck • • •Chris Huck
in reply to Kyle Davis • • •Kyle Davis
in reply to Chris Huck • • •@chrishuck right. I think I’ve met this problem.
When you have two different geometries joining with different with a different number of facets you get some pretty strange problems. The corners can’t quite align. In a 3d print? Not a problem. I can see in industrial applications it could be a big ass problem if it wasn’t just an artifact of an image quality setting.
(I actually like the look of lower facets in some more shiny filaments like this example)
Chris Huck
in reply to Kyle Davis • • •Fortunately, it’s just a graphical artifact. When it happens, I usually just turn up the quality setting from the default until it looks right. We’re not talking complex geometry here, usually just cylinders.
I never really thought about it on the printing side because I’ve been using STEP files for so long in slicers and also running my G-code through ArcWelder to produce true circular moves. It could definitely be a problem otherwise!
Chris Huck
in reply to Kyle Davis • • •