What are you making ⚒️ / 3D printing 🖨

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Electrolysis is going again. Biggest problem so far has been finding a good sacrificial anode. The baking tray I used had a coating on it, and I attempted to scrape it off, but didn’t have a clean surface. It was behaving odd overall, with the current dropping off very quickly, even after cleaning.

My dad gave me a chunk of steel a while ago for this purpose, but it was small, and covered in mill scale. It didn’t work at all.

Thankfully, my dad is a welding instructor, with a ton of steel at his disposal. He welded together a 14"x14" plate of 3/8" steel, cleaned it til it was completely shiny, and welded a nut on top to get a good connection.

Just started it up, and it’s working tremendously better. With the old baking tray, it was only drawing like 2-3 amps of current, and rapidly fell off, going down to under 2 amps. Was seeing little progress after the initial clean.

It’s now maxing out my supply, and staying at 5.1 amps (constant current mode, going down to like 10.5 volts). Seems to be way more consistent, and the oxide layer formed looks a lot cleaner. I was getting some weird green layer when I used my baking tray, despite no copper being present in the electrolyte.

EDIT: I have to edit this one b/c I can’t post more than 3 consecutive replies lol

Still doing another layer of seasoning, maybe two, but have two layers on it, and it’s looking really nice :slight_smile: especially compared to before…

Can barely tell it’s the same pan.

I need to put together a lye tank though. Electrolysis is great for removing rust, not so much for removing the carbon. A lye tank would take off all of the carbon much much easier, but doesn’t remove rust. So most do lye then electrolyte. There’s still a few nooks and crannies on this one I’d like to get clear, but nothing too bad.

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I wonder if anyone has looked into using electrolysis to pull carbon off a suppressor…. That is a whole niche into itself…

Random electronics questions for 3D printer modding

Can you get led ribbon in 24v? It looks like it, but I just want to make sure the ribbon is actually 24v and it isn’t just a 12v ribbon with a step down converter

I want a litte 24v led light smack dab on print head underside, and printer is 24v and I’d rather keep
Voltage native if possible

Second question, can I install a potentiometer or a rheostat (I can’t remember the difference at the moment) in series with a led ribbon to vary brightness? I keep seeing stuff about needing various resistors and my caveman with a soldering iron brain doesn’t get it

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Only of your ribon has three dull LEDs… You need some electronics if you want to control an LED strip that’s actually useful.

The easiest way is probably to modify an off the shelf buck converter module and replace the trimmer pot on it with a larger potentiometer. Maybe with a resistor in series if you can’t find 24V LED strips.

What is it you are trying to accomplish? To me it sounds like you dont want to run a 12v to your print head.

What i would do… put a 24-12v buck converter off of your heater power. Wire it to an ESP8266, install wled on esp8266, wire however many LEDS you want to it. you can then controll brightness from your phone. in parts you may be spending, 8$.

and in knowledge and skills gained

image

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Sorry forgot to reply

Just want to add a few leds under my print head, want to be able to adjust it so it isn’t too over illuminated

Have 24v power supply. So I’d rather use a 24v ribbon than adding a buck unnecessarily

Trying to keep it simple
just looking for a led brighter and lower analog knob… I think I found something I can use

Yea arduino and micro controllers in general and I are super oil and water, I’d sooner ditch the entire thing than try to mess with those…. I’m sure I could figure them out if my life depending on it… but juice isn’t worth the squeeze for me

I’m just looking for a led brighter and lower analog knob… I think I found something I can use

I can just solder this in

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After taking the time to search for a 24V LED strip, I found one that even comes with the dimmer:

https://www.amazon.com/CT-Capetronix-6000K-6500K-Daylight-Indoor(Dimmer/dp/B08CBZVVMD/

That should be relatively easy to setup.

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Not at home at the moment, can anyone give me a quick measurement on the standard ender 3 hot end fan shroud

Need red And green dimension

I see pilgrim, so either found a listed spec or snark incoming lol

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@tangerineaxle
@lily.ashton1990
@ThePolishedTurd
@darthdomo ???
@invalid_signal
@enginerd
@Viderus
@Az_F

@Eriequiet needs your help

:point_up:

OR

:point_up:

OR

Little Jakey is on struggle street
[there you go, since you expected a snark]
:wink:

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Lol I wasn’t going to @ everyone with an ender but that works too lol

I many things, including various forms of constant struggle bus, but “little” is not something I’ve been called in a while lol

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~48x42.5 mm

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Sweet thanks,
Have some physical leds in hand and needed to match module sizes

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Any chance you can get a rough measurement of the width of red and green also?

I think I have a plan, and I’ll have extra parts I can share when done

~12 and ~9 mm

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Nice🤩… 8mm wide strips

Should be able to do a strip on both green and red sides

Should have 15x the amount I need, so once I test it if anyone wants some led chunks I can ship

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Not me, my son. He printed 150 resin ghosts for a Halloween party.

FB_IMG_1698526280945

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That super slick

Literally couldn’t be bothered to wait for my print to finish whilst planning machine mods

Looks like 2 led segments can potentially fit, just trying to decide how to run the wires up, either inside the fan should or outside

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What am I making?

Thanks for asking :emoji_thumbsup:

Nothing really; this is barely worth the post, but sharing anyway

UNDER-BENCH BIN
I decided I wanted a little convenient bin to quickly wipe small wire scraps etc into to keep my space clean and clear on my tinker desk

I grabbed myself a cheap as fuck ander shelf fridge drawer, like this

The clips are made to fit over a glass fridge shelf and were too narrow to fit my tinkering desk

So I chopped those clips off, and wacked some double sided tape to the top side

and slapped it under my desk


Pretty dumb, but super useful

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