Notices by Koz Ross (koz@chaos.social)

It is my experience in general that someone who is critically and incurably wrong about _one_ thing is often critically and incurably wrong about _all_ things.

Recent experiences have done nothing to dispel this.

@dalias I have no objection to sandboxing of this kind by default - it is a sensible default and should stay that way. However, there is _no way whatsoever_ I can see to allow this to work. I've tried blanket-enabling _every_ filesystem permission in Flatseal, and even adding /var/lib _manually_, and _still_ it fails.

@dalias Oh, for extra joy - a globally-installed OpenSCAD won't work either, even with aforementioned nuclear permit-all Flatseal settings.

Great, now I have to figure out how I'm going to do this simple-seeming task in _Blender_, because apparently competence, FreeCAD and Flatpak live in different realities.

@poleguy @dalias I guess I could, but this doesn't change the fact the Flatpak is broken in this particular instance. I'd also likely try distro FreeCAD first, since that _should_ be able to see everything.

#Blender Fedi: how do I bevel an edge at an exact angle? Context: I want to chamfer at a 45 degree angle exactly, and the face I'm chamfering is parallel to the XY plane.

Today's fun discovery: apparently, if you install the #FreeCAD Flatpak and try to use the OpenSCAD workbench, you _cannot_ give it a Flatpak-installed OpenSCAD. Literally impossible, even if you nuclear Flatseal permit it everything, because by default, it can neither see the export directory of Flatpak nor the Flatpak binary itself, which it needs to run said export.

How the idea that someone might want a working OpenSCAD workbench in a Flatpak FreeCAD didn't occur to the packager, I dunno.

@zeitkunst @fribbledom Prusa haven't been all that open-source in truth or spirit for quite some time. Their 'open hardware' claims around the Mini are 100% a lie, and the MK4 is so proprietary that _opening up its extruder_ without a support staffer telling you to is a warranty breach.

@Polychrome @efi @ben @bunni I figured they would, but I'm curious exactly how they plan to detect and block it. Parallel importing is _generally_ a legal grey area, and kind of hard to track, which is why everyone does it.

@Polychrome @efi @ben @bunni Wouldn't this just lead to a huge rise in parallel importing? "Sure, these GPUs are for sale to New Zealand. Yep, growing economy, lots of AI and gamers there, we definitely need 10 million GPUs a year for a population of 5 million...."

As a fan of #Gridfinity, I found this #OpenSCAD tool both really useful and really convenient. I've made a lot of different bins with it, and can confirm it works well.

https://www.printables.com/model/274917-gridfinity-rebuilt-in-openscad

@3dprinting

#DIY #FDM #3DPrinting

I've been investigating (slowly, with a lot of help from @jookia and @amd ) a #DIY #CNC build. In the process, I have learned a lot of things, and felt like sharing some of what I've learned.

One example is from this video: https://www.youtube.com/watch?v=clgpZJFoqIQ

The tl;dws are:

1. Stepper motors (closed or open loop) never hit their holding torque at _any_ rotation.
2. Servos have less peak torque, but hold it at _any_ rotation speed they're rated for.

Conclusion for me: servos and gearing are best here.

#Linux Fedi: I'm at an absolute loss. I have an AMD laptop running Arch, which works fantastically well, but occasionally, almost always when watching something on Youtube in Firefox, the frame rate crashes through the floor. We're talking like 2fps even just moving the mouse around.

Only a restart fixes this - restarting the DE doesn't help. I'm on kernel 6.11.5, but anything newer is worse.

Any ideas what this might be?

@dalias That was a _very_ interesting read. My experience operating a Bowden printer definitely lines up with what is described there, and the solution is really clever.

@reprapryn Wait, _printed_ electromagnetic coils? I assume you're using like SLS or something, not FDM?

Also, welcome back!

#Blender3D Fedi: what should I use to remove resin traps (internal closed cavities) from models designed for #Resin3DPrinting ? I know about the 'separate by loose parts' method, but this only works if the cavities aren't attached to the interior, which unfortunately they often are.

I can fix this manually by cutting faces from the inside, but this is tedious. Chitubox Basic can _detect_ cavities (with some false positives), so surely the technology to do this faster exists?

#B3D #3DModelling

@mia @lanodan @jamie @trashpanda My guess? Nobody wants to pay for it, and the undertaking is too large to be a hobby project. It's the same reason why our slicers are fundamentally 2.5D and will likely stay that way forever.

@Polychrome I fortunately live in a place where I don't have to choose.

@FinalOverdrive @mia @kaia This right here is why I basically don't enjoy the company of cishet dudes. Among other things, it is _incredibly_ dull, since everything is either pecking order assertion or trying to jump above. It's dull, it's not worth doing, and it basically makes any other interactions above a very basic level impossible. Waste of time in general.

@FinalOverdrive @mia @kaia You know, when it's not casual homophobia, sexism, transphobia, racism etc.

So, one unexpected Saturday delivery later, we have _another_ tuning thread! This time, it's HIPS filament from Gizmo Dorks.

I feel that HIPS is a criminally underrated filament for printing with, as it has all the properties of ABS (high impact resistance despite low density, slight flex, temperature resistance, easy post-processing, etc), but _un_like ABS, it also:

- Dissolves in limonene; and
- Absorbs virtually _no_ moisture.

#3DPrinting
#FDM
@3dprinting