PlutoniumAcid

I've made a large number of custom prints, and all of them were created using TinkerCad. It's an amazing toolkit, stupid easy to use but versatile. That is ... until something needs a tiny adjustment somewhere. That's when I feel it would've been neat to use parametric CAD instead.

I have spent many hours following Youtube tutorials for Onshape, Fusion, and FreeCAD. Tutorial shapes like a LEGO brick are fairly easy, although I admit that this kind of modeling is a sharp departure from the kid-friendly TinkerCad.

My problem is that I don't want to make simple coasters or keychains, but complex shapes like this one. It's a holder/mount for two different kinds of walkie-talkies that I use, and the blue part slides into a tray in my car's dash where it sits nice and snug.

Question: How the hell do I even get started modeling something like this?? There's not a single straight cuboid here. Everything is slightly wedge-shaped.

The way I do this in TinkerCad is that I build the hollow first: I made a 3d model of the walkie, a little oversized, set it be hollow, and drop it into the shape - that's the red or orange shells you see.

There's so much spam, and people diligently downvote. But the posts are still shown, with -53 votes or something.

When a post is clearly unwanted, could it be hidden?

I run an old desktop mainboard as my homelab server. It runs Ubuntu smoothly at loads between 0.2 and 3 (whatever unit that is).

Problem:
Occasionally, the CPU load skyrockets above 400 (yes really), making the machine totally unresponsive. The only solution is the reset button.

Solution:

• I haven't found what the cause might be, but I think that a reboot every few days would prevent it from ever happening. That could be done easily with a crontab line.
• alternatively, I would like to have some dead-simple script running in the background that simply looks at the CPU load and executes a reboot when the load climbs over a given threshold.

--> How could such a cpu-load-triggered reboot be implemented?

edit: I asked ChatGPT to help me create a script that is started by crontab every X minutes. The script has a kill-threshold that does a kill-9 on the top process, and a higher reboot-threshold that ... reboots the machine. before doing either, or none of these, it will write a log line. I hope this will keep my system running, and I will review the log file to see how it fares. Or, it might inexplicable break my system. Fun!

I have some jet lighters in my shop. I'm not a smoker but they are useful for other things too. My problem is that they seem to not work at all?

When I buy them they are fine, push the button, clear "click" sound and a fine hot jet of fire. After a while though, they simply won't fire anymore, even though the little window shows that there's plenty of gas inside.

Are these also using the normal propane/butane as regular lighters?

edit: solved by printing at 20% of regular speed. This seems to give the filament enough time to ooze out of the nozzle, and the print result was excellent.

My Prusa MINI+ works like a charm, except with TPU. We have a 5-hour print task that starts well but fails after 2-3 hours because the TPU filament is no longer being pushed into the nozzle; instead it comes out of the extruder!

What could be causing this? Is the TPU just too soft and bendy? Is the shape of the extruder housing at fault?

It looks as if the TPU gets stuck and is then pushed into the extruder housing when the extruder continues to push. This happens again and again, but it's weird that it works well for hours before failing. The object is basically just a long block, so absolutely straightforward and no retractions.

We have checked that the nozzle is clean and has no obstructions. We have opened the extruder every time it happens, and there's no obvious problem to see (see photo 2 here).

We are considering to print a new lid for the extruder housing, see photo 3 here: (1) is the exit hole, and (2) is the cavity where the TPU ends up so it might help to change the lid (3) to a shape that does not leave a cavity there. Or is the problem that the roller (4) is too narrow or too soft?

For reference, the filament is Tinmorry black TPU from Amazon.

This is a Prusa MINI+ that has worked flawlessly for 3 months. Suddenly the prints won't stick to the bed, the first layer is all messy and I cancel the print before anything worse happens.

• The printer has auto bed leveling so I would rule that out.
• The plate is cleaned with 70% IPA, so it's not dirty either.
• I have tried to adjust the "Live Z Adjust" while printing that first layer, but no setting works well.
• Each filament is printed at recommended temps (+/- 215C) and bed is at 60C.
• Out of my 5 spools, only 1 works well: RepRapper 3-color PLA. Even the Prusament PLA fails to stick well, and also eSun PLA+, and eSun matte PLA, and Tinmorry TPU.

https://i.imgur.com/MEpK37W.png

Update:

• Thank you all for your kind input.
• I washed the plate, and cleaned the nozzle (have no spare nozzle).
• I also did a fresh Z-test (with this object) using Prusament galaxy silver PLA.
• That was successful and showed that my height was already very close to perfect.
• Z-test result shows that -1.425 is best. I was off by only 0.025. Image
• Started printing an object with eSun matte black PLA but the result was same as in my original photo.
• Changed back to the Prusament galaxy silver PLA and the result is perfect. (image)

So it looks like my filament storage is not up to snuff! Good thing that I only have a few spools, so not much is lost.

Let's say I never want to see another post about Trump, or NFL, or Apple, or that weird "rule" thing.

Is there presently any way to filter that out? In Lemmy as a whole? Or inside the Voyager app?

Printing here with eSun PLA at 215 C on a Prusa Mini, and there are lots of hairline strings.

What's causing those strings? Temp too low?

Background:

• At work we use MS Office, because who doesn't. We used to have a central file server with lots of well sorted directories.
• Then Corporate decided to ditch that, everything must move into OneDrive so there's always a Data Owner.
• The local boss had to move everything from the network share into his own OneDrive, and then share, with each of us, the folders that were relevant to each of us.
• This sounds like distributed storage, which is probably smart in some way.

In reality, it's shit. Everything is now a link to "corporateName.sharepoint.com" in the browser, and it's a hassle to find that in the file explorer. SOmeone just shared a folder with me. I see it in my browser. How do I get it from the browser into a normal folder view? Should I forget about on-disk storage; is everything today just a browser bookmark?

Worse, I have no idea what's where. Some people share some stuff and somehow it ends up in my OneDrive, but what's the context of it?

This seems so wrong to me. Am I just not "getting" it??

I mean, the simplest answer is to lay a new cable, and that is definitely what I am going to do - that's not my question.

But this is a long run, and it would be neat if I could salvage some of that cable. How can I discover where the cable is damaged?

One stupid solution would be to halve the cable and crimp each end, and then test each new cable. Repeat iteratively. I would end up with a few broken cables and a bunch of tested cables, but they might be short.

How do the pro's do this? (Short of throwing the whole thing away!)

I am looking to buy a 3D printer for my son (and for myself too). We want to print, not tinker, so it should be something that gives great results right from the start.

Can you guide me to a sensible choice?

My first choice would have to be the Prusa MK3S Plus but it is outside the price range I am shopping for, except if I buy used -- would that be bad to do?

Realistic choices:

• €380 used Prusa MK3S+, with 10 days printing time
• €400 new Prusa Mini+
• €250 new Ender 3 V2 Neo

Criteria:

• High quality, no hassle. I want to print, not tinker.
• Preferably (semi)assembled.
• Auto bed leveling.
• Auto error detection (filament, power, etc.?).
• Budget up to 600 EUR/USD including extras, excluding filament.
• Speed is not important.
• Size is not important.
• Must not be cloud-based.

Questions:

• Surface?! Smooth, os satin, or textured? (Why) Should I have more than one kind?
• (Why) Do I need an enclosure?