Comment on Counterintuitively, I did this to eliminate the need for supports

HelloRoot@lemy.lol ⁨2⁩ ⁨months⁩ ago

• captain_aggravated@sh.itjust.works ⁨2⁩ ⁨months⁩ ago

  I built this printer around 11 years ago, it’s a Folger 2020 i3, the company folded years ago. This is back before flexible PEI coated steel build plates were common; the bed assembly is a simple aluminum plate with a PCB heater suspended above it at the four corners by spring-loaded screws, and then the glass is binder clipped onto that. Glass was pretty much the meta for 3D printer build plates at the time because it’s a perfectly flat material that’s cheap and easy to source. The choice of a mirror over clear glass was mostly an aesthetic choice, though sometimes it can make it easier to manually level the bed, it makes it easier to see the gap between the nozzle and the bed.

  This machine is pretty legacy by now and it’s starting to show some signs of wear but it does still work.

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  • HelloRoot@lemy.lol ⁨2⁩ ⁨months⁩ ago

    Thanks for the patient reply. The history of printers is super intriguing.

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  • Damage@feddit.it ⁨1⁩ ⁨month⁩ ago

    Folger

    Image

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    • captain_aggravated@sh.itjust.works ⁨1⁩ ⁨month⁩ ago

      I know, right?

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      • Damage@feddit.it ⁨1⁩ ⁨month⁩ ago

        Old geezers unite

        photo of an old Prusa i3 steel

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• marcos@lemmy.world ⁨2⁩ ⁨months⁩ ago

  It’s kind of normal. Printing on a glass is normal, some people pick a mirror because it conducts heat slightly better.

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  • BeardedGingerWonder@feddit.uk ⁨2⁩ ⁨months⁩ ago

    No they don’t, they pick mirrors because they’re guaranteed to be flat at a low price.

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    • marcos@lemmy.world ⁨2⁩ ⁨months⁩ ago

      Glass is guaranteed to be flat. The thicker the flatter, and mirrors tend to be thin.

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      • BeardedGingerWonder@feddit.uk ⁨2⁩ ⁨months⁩ ago

        Glass is absolutely not guaranteed to be flat or without defect. Some glasses are. Mirrors have to be or they don’t work, they come precut in 300x300mm plates for cheap from IKEA. You’re free to check absolutely any thread from the time to see what people’s motivations were. Moving mass on a bedslinger would’ve been a bigger consideration.

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• ExcessShiv@lemmy.dbzer0.com ⁨2⁩ ⁨months⁩ ago

  It used to be normal to print on glass/mirror beds…it hasn’t really been a thing on printers for some years now since spring steel PEI sheets became the standard even for the cheapest entry level printers.

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  • captain_aggravated@sh.itjust.works ⁨2⁩ ⁨months⁩ ago

    It is in fact a fairly old, homemade budget printer.

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