𞋴𝛂𝛋𝛆
- 67 Posts
- 463 Comments
4·9 days agoSo the trick to sanding longer with abrasives is wet sanding. In addition, in automotive work, a drop of Palmolive dish soap is added to a bucket of water. This addition makes a huge difference.
Overall, the principal of like polishes like is important. In abstract, polish is just fine abrasion. Like your finger prints are around 5k-7k grit equivalent. Rub something long enough and you will both polish and abrade it the same as this grit. The oils in your skin are the polishing agent.
I have played around with 10k grit wet sanding and then machine polishing with a light compound where places I rested my hand showed minor variations after stripping any oils and fillers with wax and grease remover (solvent).
I can think of several aspects to increase the complexity here. One could add inserts into the outer vibrating shell. These could be any materials.
I think the bigger issue will actually be the distance between the object and the shell. You see, the size of the random orbital action is the product of two concentric circles. In the pro automotive world, these are pneumatically driven. There are several models available with different properties related to this motion and the internal balance of the mechanism. Within this range of actuation, it is critical that abrasion does not follow a path of repetition. I think this likely means the shell must be larger than the radius of the largest of these two circles or maybe a more complicated size larger than the combination of overlapping radii including their central connection point. This should enable the part to move within the range of random sanding action. That range means the sanding is over a larger area.
The best shell is likely one with gaps similar to a DA sander with ports for dust collection.
Very little of any fiber touches the actual nozzle during printing. The actual fiber size used in filament is far far smaller than what most people imagine. It is only the waste dust from the production and processing of carbon fiber. All actual fibers of any useful length are sold in industry for use in composites. There are continuous fiber printers, but that is not at all related to what is used in 3d printing. If you actually look at the data from people testing materials, fiber infused materials are always weaker. They print better because they are breaking up the polymer bonds. Lots of people jump on the buzzword thinking it is technomagic mor betterer but do not pay attention to the details. If the fiber had any length to it, it would clog like crazy because a long bunch of fibers distributed in 1.75mm crammed into 0.4mm is never going to happen. It is just like a dust additive that happens to be available and is compatible. So it should be well distributed throughout. With ABS a wipe of acetone should help too, if left to completely flash off the solvent for a week or more. That needs to be super limited though. Acetone tends to get retained in bad bad ways with ABS. It is a massive no no to use in automotive applications.
Have you made it to third order base or is she a bad impedance? Don’t get too hung up on her reluctance or reactance. If she takes no coulombs she is dead inside.
I would be impressed if the servos are enough to power it. Skimming through a dozen pages of posts it was just the most interesting thing I spotted to try and post some content in a dead feed lull.
On YT, CHEP is probably one of the best references for basic Ender setup and use.
You are unlikely to have the issue overall, but there is a nonzero chance of having issues with any aluminum extrusions based linear motion system. It is only a serious problem for a single digits percentage of people and the problem is worse on larger printers.
When aluminum extrusions are manufactured, the tolerances of faces are really good. However the one factor that is poorly constrained is twist. The amount is imperceptible without a metrology setup to measure the deviation. In the unlikely chance that you have triple checked every part of your setup, and you are still having issues, keep in mind this is a thing that exists. Try swapping symmetrical components where possible to see if the problem follows the swapped extrusion. This is one of those issues that is nearly impossible to find on your own unless you know to look for it.
If you need any help, don’t hesitate to reach out directly, or post. I’ll help you any way I can. Happy printing!
6·23 days agoSupply chain is important for broad scope adoption, but it is an unsolvable problem.
I was the buyer for a chain of bike shops. Unfortunately, distribution is the market bottleneck that is nearly impossible to break through.
So, at scale, no one is capable of predicting global demand accurately for any type of retail. Almost all products that are sold by small retailers are made and sold by the real manufacturer to distributors for 30-35% of MSRP. These distributors then wholesale the inventory to retailers with a 15-20% markup. This is absolutely necessary because it distributes the burden of inventory commitment to a hierarchy where local conditions are accounted for. The distributor is actually buying the inventory and taking on the risk of overburden that does not sell.
Likewise with retail. The markup is called keystone which means 50% margin. Most retailers will barely break even if the whole store averages 40% margins. Retail property and labor are extremely expensive and hard. In almost all small businesses, overburden is what kills them eventually. Overburden is what does not sell and becomes unmarketable over time.
Another aspect that is not intuitive here is that no matter how you select inventory, you will never sell that entire selection on a single platform. If you are not actively attempting to recuperate cash flow from overburden, the business will slowly drown. Sales in retail are not about overburden at all. Statistically, getting new people in the front door is the only metric that matters. Loss leaders and sales are about traffic not overburden. A good buyer plans and negotiates their loss leaders for sales within their preseason ordering.
Over the last couple of decades, more and more products have been created that bypass the big distributors. Most of it is because the product is just not worth the markup required for scaled independent distribution and middlepersons margins. However, now there is an issue of global demand where the manufacturer has the impossible task of financing scale and the inherent risk. If the product is not made at very large scale, it is uncompetitive to manufacture. You need someone willing to take that risk. As a person that has made these types of decisions at smaller scales of a few million dollars, go bet all that money on a hand of single deck blackjack because those 47-48% winning odds are outstanding by comparison.
Retailers place preseason order commitments to get slightly better margins, but primarily because the distributors are more like banks in retail. They offer credit and repayment options that mean the retailer is not required to pay up front in cash. With bicycle stuff, I placed all of my preseason orders between September and October for the following year. Stuff started arriving between December and January. I then had a first payment due in April, but I had to pay it back by the end of July. So I had to predict the summer market a year in advance and have all of my plan detailed by autumn.
This is how mom and pop independent retail actually works. It was not competitive with big box retail because those are not actually retailers. Those are rogue distributors selling directly to the public. The actual products are still the same 30-35% of MSRP.
The worst product trends in retail have been the tendency for companies to market themselves as exceptions. Like I despised GoPro in my stores. The margin on the cameras was 20% and each one costs a fortune. They constantly tried to deprecate models too. They tried to pitch that all the accessories were keystone and it made up for the terrible return on investment. In reality that inventory of accessories was overburden suicide of niche garbage for special use cases.
All electronic devices people want have fallen into this trap of low margins that are impossible for sustainable retail. When you see factory direct stores, that means the product has no margin for scale distribution. It is a neo feudalistic, brute force approach where someone is dumb enough to believe they will be able to predict global demand indefinitely without making any major errors. The public is dumb enough to follow along. Few realize the enormous power that is consolidated from cutting out the democracy of distributors and retailers. This consolidated monolith will eventually enslave everyone when they must overcome the inevitable mistakes they make. They will not just eat the loss or go out of business because they own your right to choose in a market without competition. It is surrendering choice to the dictator that makes their own demand by force.
Yeah, so, we don’t want that. - said no one. What you want is irrelevant. The lowest common denominator dictates the market. Democracy requires a well informed and skeptical citizenry. We live in an era with the smallest information bottleneck in several centuries. Search results are not deterministic and there are only two relevant web crawlers that all providers query. These are not deterministic. Two people searching on separate devices with identical queries will get different results. All major media is owned by less than a dozen people. You have absolutely no chance of informing the citizenry to make better decisions that may cost a good bit more money. People cringe if you tell them they are slaves, but do nothing if the word citizen is redefined as functionally equivalent.
The only way you will ever see such a product sold in any traditional independent retail scenario, is if some exceptionally altruistic billionaire were to chose to fund the thing with no concern over the loss. The only way to be competitive in price is to build at competitive scale of manufacturing. If someone else is doing this and using factory direct retail to stay in business with just a 30% gross margin in total, you will never find the necessary slice for regional distribution and retail. Your device will be $1000 at MSRP to their $600 equivalent. There is no solution to this issue. It is raw capitalism where the biggest fish makes the rules. The only counter balance in the system is an informed citizenry. This is why information and education are all that really matter. If the average person is too stupid for independent thought, it is the ultimate pwn as citizen means slave, and the peasantry are too stupid to recognize the situation where they own nothing and have no outlet to tell anyone or hear the plight of all the others.
12·28 days agoThe hosting and external domain are the challenging bit and what needs funding. It has been awhile since I looked into any of this, but there wasn’t an easy way to make such a thing last time I checked.
I think most of these are offloading the video feed to do the ai segmentation and analysis features that make these useful onto a hosting service. I do not expect low pricing as a feature advertised by anyone making such a comprehensive, ethical, democratically safe device. Billionaire exploitation privateer pirates have no qualms about financing hardware at break even prices for monetizing the pillaging of democracy due to the failure of citizens to remain skeptical and well informed.
Lol, practically guaranteed that this is modeled after funding it entirely on surveillance stalkerware. Article does not make any mention of who is hosting, software openness, transparency, or ownership. Sorry OP for the negative comment, and thanks for making the effort to post. For the sake of the public, this article is nothing more than an ad, with no relevant informative value required for skeptical citizenship in any democracy. It is crap journalism, like whoring for capitalism.
In my experience selling it as a whole never happens outright. Buying someone out goes the other way around. I’ve owned my own business twice.
You will honestly be better off holding your accounts if you ever change your mind or direction. You will get stuck with junk or make selling off stuff your career for a time. If you cannot keep your tools, make some impossible to pass up deal in bulk lots divided so that there is a good distribution of value.
If you placed everything on eBay piecemeal, you will never sell your last item before you die. That is the case on any single platform. I was the buyer for a chain of bike shops for several years. I have sold over $136k on eBay, and I used swap meets to offload overburden too. If anyone consigns for you, if their business model is viable, they will take at least 40% out of the gross margin.
All of eBay’s fees, shipping, taxes, all combined with an account in perfect standing came out to 39-42% of the total sale price. So with consignment, you will actually get around 20% of the total sale price or a little less. It is not at all sustainable and why no one runs successful businesses doing eBay consignments. eBay should be less than half their present fees, especially considering the poor quality of service.
Think of offloading stuff from the perspective of the interested individual, not like a business. Part out and sell your excess tooling while still running your business with what you have.
Personally, I don’t paint cars any more and if I could physically do the work, I still wouldn’t want to. However, many of my tools and stuff are still kicking around and something I do not regret keeping. Quite the opposite, I really wish I had kept what remained of my mixing system, and all of my welding and polishing gear.
YT has black boxes at all major ISPs. These cache local content. They prioritize what gets shown based on what is cached. This is why YT changed drastically around 2017. It is why you do not see content from ultra niche and high quality sources at random or get into advanced education like happened in the past.
what HP printers really do
10·3 months ago
I’ve had all of that from day one with a MK3S+. It just works. I don’t even think about it. Plus your using a slicer that is derived from what I paid for while your money does nothing for me. Adrian Bowyer and RepRap built everything. It would have started in the 1990s if proprietary shit companies like stratasys did not exist. Nothing good comes from selling your right to autonomy and citizenship by inference. The world is falling apart right now because of this exact issue of a lack of big picture ethics. Every decision has consequences. You are either part of the problem or part of the solution. I’m a real liberal. You have a right to be wrong, but I’m still going to call stupid stupid.
Super rare cars in the poorer states, where nonconformity is treated like cancer?
Lotus Evora in Alabama? Wat?
I call sus Rainbow Brite. That’s an after dark award.
Sure.
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Graduated pacman emerges… and we all know emerge is Gentoo. This one doesn’t compile.