I bought the cheapest 3D printer on AliExpress!

That's honestly some impressive engineering. They clearly weren't thoughtless about all the cost cutting, they really put in the effort to get as close to a workable machine as they could within the budget.

Would love to see a "sleeper" rebuild, that sounds like a great project!

I bought an EasyThreed from AliExpress, about $120 aussie dolalrs. It was surprisingly good (except for its slicer) and I actually made 3 times the cost back by printing custom gluestick holders for the local women's scrapbooking group members. Minimal assembly needed, just enough for a beginner to understand how the printer works and fix simple issues, which is a win as far as I'm concerned.

New speed benchy category, "most inexpensive printer".

I support this.

Engineering to make it cheap as possible is respectable. Looking at some of the cheap stuff i've ordered, a lot of them just to see how in the hell they manage to make it so cheap.. it is like looking the work of a genius. Overengineering and using the best parts.. is quite easy. Most of the work is done for you, those solutions exist already. But trying to make it cheap... requires real innovation and deep knowledge. Like here, preloading the bushings using the geometry of the whole thing: genius.

There is one specific niche that is maybe the most interesting, and that is when companies buy failed batches of chips, and then repurpose them.. You can have things like... signal output pin used as a mosfet driver... because they have dug in to the schematics of the chip and found that "if we short these two pins, then that output turns into an input..".. And it can be that this part of the chip is all right in the whole batch, and now we have a lot of very cheap, almost free mosfet drivers, that are not efficient, or may heat up a bit too much... And sure, it can have 12 pins unused but who cares if it is just powering a 500mW led on a 2€ gadget.

The fact that thing even printed a benchy that actually looks like a benchy is impressive.

The Easythreed printers make great practical TPU printers with their direct drive. Practical or useful TPU prints like rubber feet or handles for a tool don’t typically require great looking prints. So I use mine as dedicated TPU printers.

Bought that for my 9 year old. Added the heat bed. The extruder stepper motor broke after 2 prints. Took 3 weeks to get replacement. Still haven't repaired it but I grabbed a raspberry pi to set up octoprint on it. The 3 prints she completed turned out very well

The hollow tubes are smart, the outer shell of a hollow body (especially a round one) takes the vast majority of the load. So if you have the dimensions to spare, you can make quite a strong part very very light by making it much bigger but only including the material that contributes to the strength and not the useless interior

the amount of injection molding engineering that went into this is impressive. Like the materials are totally crap, but the connection of the axis and all that is very clearly custom to this device, which I find wild.

As a new viewer and non-3D printer owner, I thought the prints weren’t too bad.

It would be interesting to see what improvements or extremely cheap mods could be made to it just for the fun of it!

This reminds me of my childhood. When the other kids got cool toys, my father would always research and buy the absolute cheapest alternative.

First thought: I saw used ender 3 printers in similar prices. Second thought: Its crazy how accessible 3D printers are because of second hand market, you barely can produce a printer in price of ok quality used printer

This video was a joy to watch, because honestly everything about this tiny printer was better than I expected! I can't wait to see what you do with it in the future, it seems like a great machine for just tinkering and having fun.

It's amazing that in 2024 a toy-like printer like this actually works and prints usable parts! I'm not a 3D print enthusiast and I don't even own a 3D printer yet, but I remember 3 or 4 years ago printers 10 times the price of this would require a lot of tuning to even produce a benchie without major failures

Actually hollow tubular rails is sound engineering for optimum stiffness-to-mass ratio; others should do trhe same.

Actually, pretty amazing for the price. As an occasional maker of PCBs for personal use, one thing caught my attention: tactile switches can be surprisingly expensive in comparison to many of the other components. Thanks for taking the time and expense to experiment with that printer!😁

this thing is just so elegant, i can appreciate the drive to maximize (or minimize in this case) a parameter to the absolute limit, idk this thing is a work of art.

If the filament spool was positioned on the right side of the printer, tugging on the filament would not unload the bearings, but rather would increase the load. That might make the printer more stable as it pulled filament into the extruder. Interesting machine. Thanks.

Some background info on the AT32 chips: They are indeed 'STM32 clones', although it's not exactly a clone since STM doesn't have an F403A, but it has similar registers and features as STM MCU's. The AT32F403A is a 240MHz M4 MCU with some impressive specs: 1MB flash (1024KB flash + 256KB SRAM), with the first 256KB serving as zero wait stage flash at full 240MHz, and 97KB SRAM (expandable to 224KB by taking 128KB from zero wait stage flash). I've been playing around with these chips recently and I like them a lot, they cost not much, 2 bucks for 64 64-pin variant with 1MB flash.