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HewlettHackard

@ HewlettHackard @lemmy.ca

Posts
5
Comments
57
Joined
3 yr. ago

  • 3d printer recommendations

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  • For what it’s worth, it’s the same with Prusa. The only work I do on my printer is glue stick on the PEI sheet when printing otherwise-incompatible materials.

  • i have been informed I have a 3D Printer hobby, not a 3D Printing hobby

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  • Well said. It’s just important that when recommending printer models to newcomers that we’re honest about time vs money and printer vs printing.

  • Considering the Prusa CORE One as first printer - any reason to reconsider?

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  • In practice, I haven’t found the print volume of my MK4 to be too limiting. Occasionally more X/Y would be nice, but plenty of parts that are too big for my printer would be too big for any printer and still need to be cut. The other issue is that even fast 3d printers are slow and I don’t really print things that take entire days. Even printing dactyl keyboard halves takes hours thanks to the need for supports, so I can’t imagine someone frequently doing really huge prints (particularly in height).

  • Manual M600 command in G-Code creates terribleness with Prusa Mk4

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  • I had the same experience the one time I tried it. It seemed like it might be trying to do a “ramming” sequence like used on the XL, but it just jammed my extruder. I haven’t tried it again. If you have the time and motivation, it’d be great to submit a bug report to Prusa.

  • Bridging direction should be geometry-dependent

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  • Interesting, it took me a while looking at your images to figure out why the original design didn’t work. The problem was that there was no solution that could avoid at least one extremely long bridge, and that bridge also forced the adjacent bridges to be “wrong” (though maybe if it printed the super long bridges first, it could’ve made the rest short).

    I don’t have much to add besides being surprised the problem was more interesting than it first seemed…and I don’t accept that you were being an idiot because it want immediately obvious to me either. Or I am one too :)

  • Proposal to reduce or completely eliminate waste from filament swaps with multicolor or multi-material printing: “purge to filament”

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  • especially if it were printed vertically, i.e. you would be pulling the final product into your extruder in such a way that it would be pulling against the layer lines.

    I agree that vertically-printed filament would have poor tensile strength, but isn’t most of the load from the extruder going to be compression, shoving it from the extruded gear to the melt zone and nozzle? Other than during retractions, doesn’t the tensile stress just comes from pulling the filament off the spool?

  • 3DPrinting @lemmy.world
    HewlettHackard @lemmy.ca

    Proposal to reduce or completely eliminate waste from filament swaps with multicolor or multi-material printing: “purge to filament”

  • My personal benchy: this one really tests a printer's capabilities

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  • What about printing it in two halves the each have a flat bottom? Since the optical quality doesn’t matter, the line down the middle of the lens won’t matter.

  • YSK that United has significantly escalated their war against basic economy passengers

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  • Virginia Prosecutors Fight to Uphold Life Sentence for Man Found Not Guilty

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  • Deleted

    Prusa MK4s launch (TLDR)

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  • This looks great! I’m super happy with my MK4, and have never had to do anything with it after the initial kit build and re-seating the LCD cable to fix some early screen-blanking issues.

    I’ll probably skip this for my own printer since it seems like most (but not all) of the speed up comes from layer height, but $99 is not terrible for anyone who gets value from it. And anyone buying a new printer gets this stuff with no price increase, which is nice and makes the MK4/MK4S even easier to recommend.

    I didn’t know how much more dimensionally accurate Prusa’s prints are compared to the competition, but it makes sense now why there are so many calibration models online if that just isn’t the way every printer works. I’ve designed some parts that need an 0.1mm first layer because I’ve never had any failures with that, but I guess if I share the STLs other people might have trouble.

  • Locked

    A cool guide to Early warning signs of facism

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  • I do think it’s important to be unassailable, because it’d be easy to say “the libs are making misleading claims” and then people not paying lots of attention will think there’s a “both sides” situation going on. I’m sure we all assumed it was literally on display as an exhibit; I was mislead. If you stick to transparent, honest language, the “both sides” stuff falls apart.

    The MAGAs are unreachable, but the poorly-informed are out there too, and making them easier to confuse (by actually also spewing misleading-but-technically-true things) is not a good strategy.

  • Locked

    A cool guide to Early warning signs of facism

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  • Maybe, but that’s still insincere. When truth is on your side you don’t need to use weasel language.

  • Locked

    A cool guide to Early warning signs of facism

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  • CAD "best practices" that happen to avoid the toponaming problem?

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  • The best I have is to be careful to minimize dependencies, and minimize when I change the number of faces an object has, but of course that’s unavoidable sometimes. I don’t buy it that all CAD tools have the same problem or that this is how real professional CAD designers would work, though.

    To minimize dependencies for example, instead of drawing the sketch for pad 2 directly on a face of pad 1, I might draw it on the base plane and transform the sketch to line up with pad 1’s face. The main consequence is that I need to manually move pad 2’s sketch if I change the size/position of pad 1. It’s a tradeoff, because I’m giving up some of the benefits of parametric CAD in exchange for easier fix-up.

    I agree, mapping a datum plane to a face should have the same topo naming issue as just drawing on the face, so I don’t know why the guide would suggest that. The comment below about mapping datum planes to a simplified skeleton is interesting though.

    The good news is that the next release (which sounds imminent) apparently improves it quite a bit.

  • Lemmy.ca's Main Community @lemmy.ca
    HewlettHackard @lemmy.ca

    The changing feel lemmy.ca’s front page

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    Let's talk about Prusa Printables contests. It might need some fixing.

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  • They definitely don’t know what they’re doing. They featured this one, which is a death trap. It has a disclaimer that it might not be safe above 120V, but it’s absolutely unsafe and a code violation in the US, where we use 120V (and are very litigious). The disclaimer says they’re trying to get it approved which implies they believe it could be and that the design is sound, but fundamentally it cannot meet code in the US for mains voltage use.

    Even if the design were sound, there are material requirements, and having seen the quality of prints some people find acceptable, there’s no chance allowing random people online to print their own boxes is safe.

    I think they basically run the contests and feature things based on “ooh this is neat” and “this will excite people to use 3d printers”. It’s a marketing thing, and I guess I accept it because I have low expectations of even pretty-good businesses. But if it’s illegal…someone should probably let them know.

  • Dangers of Refactoring

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  • I was expecting Hal

  • YSK: it's not just Tesla, 1/3 of cars in built in the last ten years have passenger/rear windows that are almost impossible to break in an emergency.

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  • On the other hand, an experienced driver might forget it’s there since they never use it. Add in a high-stress situation, and you get a problem.

  • YSK: it's not just Tesla, 1/3 of cars in built in the last ten years have passenger/rear windows that are almost impossible to break in an emergency.

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  • Now imagine you’ve been driving the Tesla for a long time and don’t ever use the manual release because you’re not supposed to so you don’t mess up the window. And then imagine you’re in a high-stress situation. That’s how having an unmarked backup can fail.

    Plus, that handle doesn’t even look like a normal handle - I have never see a car where you pull up to exit instead of sideways away from the door.

  • YSK: it's not just Tesla, 1/3 of cars in built in the last ten years have passenger/rear windows that are almost impossible to break in an emergency.

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  • On the other hand, if you never use the mechanical release and have spent a long time only driving your Tesla, wouldn’t it be possible to forget it’s there while in a high-stress situation?

  • 3DPrinting @lemmy.world
    HewlettHackard @lemmy.ca

    CNC Kitchen’s website

    www.cnckitchen.com
  • LEGO @lemmy.world
    HewlettHackard @lemmy.ca
    SEC

    Articulated Bus by BrickyMateo018 - Lego Ideas

    ideas.lego.com /projects/fd0c3635-2a6c-4799-a5b9-a6fad795a25c