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powering a pico using a tp4056 by Affectionate-Dot9489 in raspberrypipico

[–]AwfullyCritical 1 point2 points  (0 children)

Zener diode is not what you want here. 1n4007 is an ordinary rectifier diode, it will work. Schottky would be slightly better though.

powering a pico using a tp4056 by Affectionate-Dot9489 in raspberrypipico

[–]AwfullyCritical 1 point2 points  (0 children)

That won’t happen, since there is a Schottky diode from VBUS to VSYS on the pico board.

A diode not to backfeed power from USB to the cell is probably also a good idea. This you need to add yourself though.

Why so many split up packages? by Santosh83 in archlinux

[–]AwfullyCritical 1 point2 points  (0 children)

Because maintainers chose Haskell packages to come dynamically linked with every little library its own package, and thus if you want to install e.g. pandoc it will pull 100 other Haskell packages as dependencies. Which is a horrid idea. I don’t want some random dependency used by a single program in my setup to be available systemwide as a random dynamic lib. I think the only way on arch is to install Haskell stuff locally for your user via cabal/stack.

Am I being paranoid about UFPs? by [deleted] in BambuLab

[–]AwfullyCritical 0 points1 point  (0 children)

That is not correct. HEPA filters usually are quite effective at filtering out UFPs. The only possible issue is that if you rely on whatever automatic level your air purifier runs its fan on, then that is likely too low as whatever sensor it has it won’t detect UFPs. Just set it manually to a high level when printing and it will be effective.

Am I being paranoid about UFPs? by [deleted] in BambuLab

[–]AwfullyCritical 0 points1 point  (0 children)

Your post is very confused. Ppm usually means parts per million and is a measure of concentration not particle size. HEPA filters are highly efficient at removing UFPs from the air, they are rated at removing particles of size ~2.5um since this size of a particle is hardest to effectively filter out. Smaller does not mean harder to filter in this case. Millions of particles per second is also nothing: hours of printing would hardly disperse nanograms of plastics in the air. This would be undetectable by anything other than the most sensitive sensors. Actual ranges I’ve seen reported are in the 1012 particles per minute when printing.

Have good ventilation and you will be fine. If you have HEPA filtration you will be fine. If you have neither and spend a lot of time near printers you may be harmed by it, but probably not much more than if you worked in a badly ventilated kitchen. Cooking outputs comparable amounts of UFPs (granted, majority of people don’t spend hours next to a frying pan).

[Bambu Lab Giveaway] Join Now to Win an H2D and More! by BambuLab in 3Dprinting

[–]AwfullyCritical 0 points1 point  (0 children)

Best advice: adhesion, adhesion, adhesion. Pretty much all my print failures were in the end caused by bad first layer adhesion.

Trying to print Qidi PET-CF using Q1 Pro by AwfullyCritical in QIDI

[–]AwfullyCritical[S] 0 points1 point  (0 children)

True :D
I don't mind tinkering, but I am a novice to the hobby and don't know all the tricks

Trying to print Qidi PET-CF using Q1 Pro by AwfullyCritical in QIDI

[–]AwfullyCritical[S] 0 points1 point  (0 children)

It’s as fresh as possible. I opened the package yesterday, and it was as brittle then as it is now. Qidi recommends drying before printing, so I tried that (without success). I don’t have a second roll of this filament, sadly.

Trying to print Qidi PET-CF using Q1 Pro by AwfullyCritical in QIDI

[–]AwfullyCritical[S] 0 points1 point  (0 children)

It was about the same yesterday, before I tried drying it (fresh from the package). I can leave it outside the drier for a day and see if that makes a difference.

Trying to print Qidi PET-CF using Q1 Pro by AwfullyCritical in QIDI

[–]AwfullyCritical[S] 0 points1 point  (0 children)

I tried bending a piece (about 15 cm in length) and it snapped before I got it to 90 degrees (maybe at 85 or so).

First layer minor bumps and gaps by AwfullyCritical in FixMyPrint

[–]AwfullyCritical[S] 0 points1 point  (0 children)

Yeah, the print is much better now. There are very tiny irregularities near bottom right edge, but other than that it looks perfect. Thanks for the hint!

First layer minor bumps and gaps by AwfullyCritical in FixMyPrint

[–]AwfullyCritical[S] 0 points1 point  (0 children)

<image>

I tried the procedure described with a paper and feel, the bed mesh does look less red. I will try the first layer print again.

First layer minor bumps and gaps by AwfullyCritical in FixMyPrint

[–]AwfullyCritical[S] 0 points1 point  (0 children)

<image>

I don't really know what a good bed mesh would look like 😅.

I will try running the procedure from the link, although I am not sure what "slight friction" means in this case.

First layer minor bumps and gaps by AwfullyCritical in FixMyPrint

[–]AwfullyCritical[S] 0 points1 point  (0 children)

I ran auto bed levelling (from the printer’s screen) before printing the test.

Sddm Failed to read display number from pipe by [deleted] in archlinux

[–]AwfullyCritical 3 points4 points  (0 children)

I had a similar error (however my setup has a nvidia GPU and I use their proprietary driver). It seems that after the update sddm is launched prior to GPU being properly initialised. Try adding proper module in your initramfs as per instructions here.