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Comment by imtringued | Hacker News Reader

It is. I have no interest in messing around with 3D printers and was annoyed by the fact that Bambu lab lied about the 15 minute setup time. It was more like 45 minutes, but after that I never touched the printer again and started printing instead.

Also, subtractive manufacturing is much harder than additive manufacturing, because you need to position the machine around an existing piece of stock and sequence your operations manually, instead of letting a generic slicing algorithm slice from bottom to top with an offset vs the intended printing location only being a problem if you accidentally print over the edge of the build plate, which is usually not possible mechanically.

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it is not that. i mostly mean that for anything functional that needs to take a load you need at least petg or asa (abs is a bit old now), which require proper storage.

also there are so much stuff that are in open prs and issues for years that are not implemented for slicers.

There are countless firearm receivers that have been printed on pla plus, many with thousands of rounds on them. Sure they may turn into a puddle in a hot vehicle, but they are functional and definitely take a load. Pla + is actually preferred in that community over the others you mentioned, although asa is becoming more popular, along with filled nylon alloys.

I think the AMS unit for the Bambu is somewhat sealed and has desiccant in it.

"take a load" - I don't know what kind of load, do you mean the fact that PLA is creeping under sustained load?

If that is YOUR usecase that is fine, but that does not mean that set and forget works just fine for others. Btw gun people use PLA plus just fine.

"Take a load" = perform mechanically and or structurally at levels of force, temperatures, etc. at levels higher than the properties of PLA allow for.

Don't get me wrong here. PLA is a great polymer, However you can't really expect parts made with it to hold up when compared to other "engineering grade" polymers.

I don't think anyone expects PLA to be used for anything that requires structural stability. There's far better filaments for that application. Some of the carbon fiber infused PETG filaments for example are incredibly strong.

Not many people use 3d printing for applications that require extreme strength though, that's really not the goal many people are aiming for.

You would be surprised!

I do this for a living and people are always looking for more parts to run through the process and better filaments to see those parts end up performant.

CF-PETG is strong! For a bit more toughness and temp resistance, PA12CF35 is seeing a lot of use. Some companies out there have service departments to keep machinery running. They apply FDM more than you might expect. Alloy 910 for gears, Cf of various kinds for abrasive scenarios, like cardboard handling, in one scenario.

Well for example layer bonding is better compared to some other materials. It's just that load over time it will creep. And of course shite under temperature.

It can be a fantastic material for some functional parts.

But even if not, I don't see how it's invalidates that there are printers out there that are more or less set and forget.

Bambu printers, or at least the one in our shop runs ASA set and forget style.

It is a great machine though it does not always make the strongest parts, and single material builds is geometry limiting. Lack of chamber heat and one nozzle makes some things easy, but does not entirely avoid the trouble with higher performing polymers.

that is just one example of issues with thermoplastics. the AMS is great though.

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