j4k3
@j4k3@lemmy.world
- Comment on Alligator Auschwitz 7 hours ago:
Think it has a hole, a shithole, in need of a shitpost. Fucking worthless gas chamber shit is a resignation of all life rights
- Comment on I want a community to exist like 4chan greentext here 8 hours ago:
Close the fediverse, we already had a solution
- Submitted 8 hours ago to fediverse@lemmy.world | 6 comments
- Comment on Kanye West was denied entry to Australia after releasing antisemitic song 1 day ago:
Dude does anything for a spotlight so even this hitting news is a positive validating his relevancy
- Comment on Bambu Printers Discussion 1 day ago:
I have no skin in this, but VC is involved with Bambu, as I understand things. That never goes well for consumers. They backpedaled to slow down the path to closed garden exploitation, but took no steps to open source or sell a legitimate product that can be owned. The solution is unplug it from the internet cause we gonna do what we gonna do ^(fu^ ^fu)^
Build a Voron and own it for life. I know the excuses, but burning ownership-money, only to rent what someone else controls is mental. In the big picture, that is willingly selling your right to citizenship for neo feudalism as a slave to an overlord. It really is that simple. Normalizing that dystopia hurts everyone else too. But hey you do you. I’m happy for ya if that is your cup of tea.
- Comment on Tips for TPU? 1 day ago:
Smooth prusa powder coated works great.
Drying makes a gigantic difference. It only takes around an hour in the open before TPU changes significantly from any ambient moisture and become visible in the print.
If you can control the moisture to a minor degree, you can alter the mechanical properties significantly. Once you hear popping, you’ll likely start blowing holes in prints, but there is a stage before this where the bubbles of gases are present but are not coalescing into the larger audible voids of escaping steam. You will see this on long prints using dried TPU filament left out in the open. There will be a much tougher start to the print that gradually degrades into a slightly softer and more flexible texture. It will likely turn slightly foam-like spongy rubbery soft for a section and then it will start popping and dropping walls with holes in the structure.
If you write down the room temperature and humidity and note the time it takes to get to this moisture property, it becomes possible to alter the flexible properties or empirical hardness of a TPU to make it behave in off label ways. This is essentially creating your own rudimentary foaming or light weight filament. It works best for vase mode or other small single wall structures. I have used this based on intuition alone. I imagine with a bit of record keeping one could control the humidity of a box to do longer prints within this state of foaming softness. I don’t know of anyone using a humidifier like the ones for acoustic guitar cases or cigars in a filament box, but that would be an interesting thing to play with too.
- Comment on Why is Lemmy attempting to radicalise people to enforce class wars? 3 days ago:
Leaves echo chamber ahhh WTF!
I post hobby stuff I’m working on. Everybody seems to care very little. I try to say stop being assholes and people hate for it.
Bias here seems typical for tech geekigarchy. After 2 years on Lemmy – echo chambers are also self selecting and self filtering.
- Comment on Turbine Blower 3D Prints Every Part, Including Triple Planetary Gears 3 days ago:
“Randomize seams” uhh no, design parts with seams in mind if they are critical. I often add a small 0.3mm double chamfer “zipper” on a surface because it will accommodate the inconsistency and reduce it by forcing the root inside the body. I’ve made my own infill structures and patterns lately too.
- Comment on 3D Printing Bed Levelling (Traming) - Simple Concept 4 days ago:
You can just slap a dial gauge on the gantry and move the X/Y manually to see exactly what the deviation is. A decent second-hand dial gauge on eBay will run you $20 shipped.
If you get into the weeds, there is not an accurate method of triggering any form of mechanical stop that involves touch or a hall effect probe. You must get into optics for real accuracy, but that is nonsense for the materials and scope of printing. You would need to eliminate many other variables like the filament accuracy and how backlash and step accuracy are eliminated as issues. As a former owner of an auto body shop with employees, most people do not know what clean is or how tooth is required. Like isopropyl alcohol has its place but is ultimately extremely weak at real cleaning problems. In automotive paint, silicone is a major problem. It primarily comes from tire dressing that makes them look slick black. The amount of effort it takes to remove that junk for automotive quality work is insane. Most chemicals just lush the junk around but leaves or dilutes the issue often making it worse. One of the big tricks in automotive stuff is (to use a a chemical cleaning step first but -) a few drops of dish soap in the wet sanding bucket. The light soap will keep the sand paper clean and working longer, but also makes most work also cleaning work. Anyways, dish soap can be very effective. Acetone occasionally on a surface is also effective. Virgin lacquer thinner is the strongest common solvent but it can react with lots of stuff and you are unlikely to find true virgin solvent. The recycled stuff has a paint stripper component in it that will cause epic nightmares and reacts with almost all plastics. Acetone is much cleaner and consistent unless it is sold for junk like nail polish. The general rule of thumb is to assume a mechanical tooth adhesion is the primary form of bonding unless there is a catalyst involved (2k/urethane primers/clear). That rule can easily apply to 3d printing and bed adhesion. I see a lot of the same types of effects from different surfaces and filaments. There are even special adhesion promoters like Bulldog for spraying plastic automotive parts. I had other tricks too like a mist coating of clear coat. The main trick is to know what grit or “tooth” each thing you’re spraying wants to grab onto and prep accordingly. So I use the general safe bet of sanding my smooth build plates to 600 grit. With sanding, do not start dirty, like you’re trying to embed junk into the surface. Start clean, then knock off the shine to a smooth and consistent matte finish on the entire surface. When it comes to sanding like this, edges and any anomalies are absolutely forbidden. Never touch your edges until last when everything else is done. Edges are always thinnest and most vulnerable to causing issues especially for the inexperienced. Clean it with acetone like once or twice a year and then sand it to matte, clean that with dish soap, then alcohol with each print. That will completely eliminate contamination as a cause. Perfect first layers are possible with enough fussing with the software. If you really want to level the bed with hardware, use a dial gauge clamped to the extruder. That will remove all of the averaging and inaccuracies from probing. You would need to get into optics for true accuracy like with closed loop control systems that are an order of magnitude more expensive than 3d printers. These are precision machines with no accuracy. The 0,0 home location is always slightly different, but all measurements are based upon this location. This issue becomes relevant with IDEX and CNC. Going we beyond these, in optics accuracy requires a defraction grading and alignment of light patterns. I so want to get into that one to grind my own telescope mirrors. If you have v-roller wheels on extrusions, one other major potential issue is that extrusions have a relatively large twist tolerance component in their specification. It is extremely difficult to detect this kind of twist, but it is a major potential issue.
- Comment on Moire/Vernier Radius Gauge 4 days ago:
Very cool. I was thinking about ways of making a potentiometer knob on an audio amp more visually interesting. The moire effect might be one to play around with.
I don’t think I would trust this one in practice, but the effect is interesting. I found it far more necessary to learn the vernier scale with micrometers. It felt much more useful understanding the practical limitations and scope of when to use calipers versus a mic. While there are super accurate calipers, relatively cheap calipers and micrometers are far cheaper and easier for most people to access.
When it comes to radius gauges I trust these more than any of the others I have tried:
I know this kinda isn’t the point, but using it as an excuse to share – the fishing leader line to hold a set like this is key to making them super handy. Unfortunately I have only used micrometers on a few 3d printing projects. Those are more used within the machining realm.
- Comment on 6.3mm spade terminal with wire retaining clip printed in 4 days ago:
here is what is inside
Image took way too long to figure out/make a small gif in Linux and even this one took hacking slow frames to get under 300kB with gnome screen capture, ffmpeg, gimp, and gifsicle to capture a simple FreeCAD turntable.
- Comment on 6.3mm spade terminal with wire retaining clip printed in 4 days ago:
Thanks. I’m not worried. I have nothing to lose and anyone scraping has enough to find me if they really wanted to. If they are after some physically disabled guy, hopefully they do a better job than the person that left me like this.
- Submitted 4 days ago to 3dprinting@lemmy.world | 6 comments
- Comment on YSK that you can create keyboard shortcuts to adjust brightness and contrast of your computer monitors even on a desktop PC 1 week ago:
Not as of a year or so back. I’m not sure how it works but there are several settings available in the manufacturer’s app that are not in Linux. Only the hotkey settings from the fn+ function keys work. Dmesg spits out a block of unrecognized memory that is something like 8 or 16 bits long that is the likely culprit. There is some odd microcontroller on a serial bus that is unrecognized too IIRC but that I have never seen before like any of the thousands found on LCSC. Last time I checked linux-hardware.org, it looked like no one had solved this one on any of the scans. I’m not motivated to chase it down myself. Poking some registers or watching for the changed location after using the built in hotkey would be peripherally interesting as a general thing to know.
- Comment on YSK that you can create keyboard shortcuts to adjust brightness and contrast of your computer monitors even on a desktop PC 1 week ago:
How does one find an unknown register in hardware for a similar but undocumented setting? My laptop has an undocumented microcontroller for the RGB keyboard. I can change it through the extra function keys but only to a 3 level preset and not the real fine tuned control. I can dual boot and change the setting with their app and it is persistent. If I could discover all registers their app uses I would totally ditch w11 and free up a good bit of space. I figure it is just a block of memory somewhere, (thinking like Arduino stuff), but I am clueless about how to find that at OS level complexity… If anyone here casually knows at a conversational social level here, like don’t go looking it up for me or whatnot
- Submitted 1 week ago to science@mander.xyz | 1 comment
- Comment on Protection 1 week ago:
This is a 2.4 GHz directional WiFi antenna. Only the back element is connected to the transceiver. All of the other elements are there to focus the signal. Anything metallic within a few feet of an antenna will have a substantial effect on the signal. Think of it as light, because it is, only transparency of materials is a bit weird. The biggest issues will come from metallic materials that are earth grounded and anything with a wire length that is close to the wavelength of the radio light or below, especially around half and a quarter of the wavelength. That pictured wire pitch is spaced very close to the approximate 2.4 GHz wave length. For example most antenna are an insulated trace on a circuit board that is insulated with ground up to a point and then there is a small circuit element that stops the ground and the actual antenna trace continues for the respective light wavelength to transmit or receive. All an antenna is here is an exposed length of single conductor wire.
- Comment on New God tier filament for me 1 week ago:
Who responds to a general skepticism as a personal insult while having no substantive material or value in reply and projects further onto absolutely unfounded and unrelated nonsense in a rant. That was remarkably pathetic and quite disappointing to see from any human. I expect you to act exactly like in real life and if you said this to my face, I’d call you a stupid asshole too.
- Comment on she's in trouble 1 week ago:
10/10
- Comment on 8999 BC 1 week ago:
12025 Primitive Era: mythology in metrology
- Comment on New God tier filament for me 1 week ago:
Totally paranoia fueled here, but I’m thinking along the lines of extrapolating ‘extraordinary claims require extraordinary evidence’ into the practical applications space of ‘extraordinary material properties that deviate substantially from baseline must have extraordinary compromises elsewhere.’
You know, like the saying, ‘pick any two engineering targets of three: Good, Cheap, Fast’.
The materials are not magic, so why was this not some baseline for all of these years. Why is it when the world is deregulating and accountability for exploitation and criminality are none existent, suddenly some miracle chemistry product comes along?
As stated, this is probably unfounded paranoia and is entirely baseless speculation. However, I think the prudent course as consumers in the present is to be extraordinarily skeptical of all new products. I want to know exactly what additives and base materials are used, what volatile organic compounds these create at all printing temperatures and well beyond. There is poor actual thermal coupling and feedback between a thermistor and the real melt chamber temperature gradient. The thermistor is only measuring a block’s temp with heat dissipation and averaging, not the cartridge temperature or hottest point in the melt zone. So what happens at higher temps than recommendations is important to know especially with high speed printing where the extrusion is pulling most heat out of the block but super inconsistently for PID control loop stability.
I think about Tetraethyllead in gasoline as the standard of chemistry in capitalism. It was the miracle property enhancer solution to stabilize combustion to avoid premature detonation at the cost of harming every human alive.
Whatever is in these products is in the air inside your home. We live in primitive times where biology is only in a precursor stage of discovery and poorly understood. It is not yet an engineering science where humans can wield the power of a complete understanding to create and modify living systems at will. We have never even created life from precursors and reverse engineering a known system.
Until exceptionally transparent disclosure of materials, and testing are provided, (haven’t looked maybe they exist tbh), I’ll stick to older materials that have been somewhat vetted by time and availability with the public as lab rats showing no particularly concerning health issues. For this new stuff, feel free to be the rat in a cage. I’m watching with popcorn ready (sry).
- Comment on Life after 30 be like 2 weeks ago:
Bae, why are there a hundred people in our bed?
Club night - Comment on Federated 3D print files (Manyfold) 2 weeks ago:
Love the idea, unfortunately it relies on cdn.jsdelivr.net to work so I won’t use it. It also is trying to access the server: analytics.eu.umami.is to view. I can see the 3dprint.social website, but not any images. I personally never use a website that requires a 3rd party connection to any server that could be accessed by other websites. The standardization of this practice is none of my concern, but it is wrong on many levels of ethics and big picture politics that ultimately impact democracy. Specifically, I may decide to trust your server, but I will never give you agency, real or potential, over me and implicitly trust others as a result of that relationship. Anyways, that is my personal choice, speaking as a user, but as a Mod: also why I’m not going to directly promote this site as it is configured currently. This is no different than my stance on Printables or Thingiverse.
- Comment on ..yeah 2 weeks ago:
Been saying all along. Climate change is only a population problem from the perspective of the super rich exploiters. When the gov gives up on climate change due to the rich investing in politics, you can count on them having a plan and solution that does not involve the rest of us.
- Comment on Priorities 2 weeks ago:
It gets really old after 3-5 years and you really start to encounter the unspoken needs like social interaction and the purpose work brings to one’s life. The failures way pretty heavily; far more that you’re likely to expect. A lot of my best ideas and dreams for projects were unexpectedly tied to other chance circumstances that were not present when I had all the time in the world.
Mind you, I am very physically limited, still fully mobile but I can’t hold upright posture to sit up or stand for more than an hour at a time. That has never changed in 11 years, but I am degrading and was slightly more physically capable years ago. I was super capable with my hands before things changed like, painting cars, building engines, high level fabrication, some machining, mig, stick, and tig welding etc. I had to learn new interests like electronics, programming, and 3d printing. Still I have had the unlimited time hack in life, largely in social isolation due to limitations. Lemmy is actually a substantial remedy to this very problem for me.
Anyways, life is about the journey, not the destination, so don’t get too hung up on those dreams of unlimited time. Should you be unlucky enough to experience something like I have, you’ll likely miss what you have now and realize the richness of your present dynamic range of life experience.
- Comment on UPS is bullshit for international shipments 2 weeks ago:
UPS is for domestic small items only. FedEx is for larger items as they price for dimensions not weight, i.e. shipping a bicycle box or similar is only something to do with FedEx. DHL is your goto for small international so long as it crosses boarders. USPS is also an option. The paperwork to ship will take an order of magnitude longer.
All shipping insurance is a 3rd party scam. Any mistakes are fatal too.
I was a pro eBay’r for a couple of years and knocked down $136k in total gross sales on the platform selling high end bicycle consignments. (It is not a viable business market due to the overhead and sleazy nature of fees structure obfuscation and bad seller services/support. Total overhead for the platform in 2017 with all fees, taxes, and shipping lumped together was never below 39% with a perfect account history. They go to great lengths to prevent you from knowing this number. It takes 3-4 months of meticulous accounting to extract this figure for any given month and close the books on real sales.)
The inability of USPS to reform and improve efficiency to reduce cost is one of our biggest grassroots small business inhibiting atrocities in the USA. It is a massive factor that few people understand or realize. Much of the poor performance of other carriers is due to the outdated and overpriced nature of USPS. Amazon has obliterated retail in the USA because they exploit this incompetent mismanagement of logistics. It goes all the way to terrible government. Like there is absolutely no reason for daily mail in all rural areas.
- Comment on Tips off the cops 2 weeks ago:
It truly brightened my morning to see you here again after sabbatical. Belated from my sparse parse of the feed, but a most welcome sight. Welcome home.
- Comment on Tips off the cops 2 weeks ago:
You’re going to RHEL for your sins! Repent!
- Comment on When someone's about to explode 2 weeks ago:
giffy
- Comment on Tips off the cops 2 weeks ago:
Arch user vitriol at a Silverblue solution
