Lemontron - Open Source 3D Printer is Ready to Download

[@imst4722]

Homies don’t let their homies use soldered wires in screw terminals. Solder drifts and could be a fire hazard. Pla also drifts over time so you’ll need to constantly re-tighten all your bolts. It’s likely that any pla part under constant strain like the idler mounts and gantry mounts will shift/warp

[@lemontron]

Yup will keep an eye out. This and general warpage were brought to my attention back when I began. I do have one prototype (the one in the last video) that had been printing for a month, and it held up very well with no drift. I noticed some flex at the last minute so I fixed that with the new reinforced z block design so I’m on top of it. I suspect because it’s so THICC what little forces are acting on it just don’t contribute to much drift and all the pulleys are screwed in tight and have a washer to sit on which spreads the load many THOUSANDS of times over just having a screw post cantilever like in the journeymaker design. Time will tell.

[@ericleung34]

Please avoid using solder on screw terminal wires. This has caused problems with the Ender 3 in the past, leading to burnt terminals for many users.

[@woutervossebeld4664]

​Fyi, the term for material slowly moving under load is creep. You might also be less affected by it since it is a function of temperature and the positron isn't enclosed.​@@lemontron

[@TheGiuse45]

Solder doesn't drift

[@Roobotics]

@@TheGiuse45 Incorrect, it does, under pressure it very slowly 'flows' and deforms, shifting away from the compression forces, the connections becomes looser and higher resistance, starts to heat up, the solder oxidizes and flows away even more, then fire/melting/charring from the wire insulation.

[@bizget]

I've been following the Positron project since it was first announced and have always wanted to build or buy one, but I definitely had to wait for you to finish the Lemontron before throwing money at anything. This is sublime!

[@Smokinjoewhite]

Haha, orange ya glad you didn't just build the positron?

[@010falcon]

To people doing DIY, buy ferrules, they cost 1$ on Ali for a set of them. Soldering the wires has caused many fires by them coming loose, don't cheap out!

[@forivall]

I love the little noises you make when applying solder, etc

[@Jynxx_13]

Looks like a very well thought out design. The tinned wires in a screw terminals is a big no no, especially on power wiring. I'm also not fond of using a screw gun without going back and hand torqueing. Cool printer but having 3 printers with this build volume already I can't justify building one....yet.

[@lunaumbra5179]

But what about bringing a printer to remote satanic rituals in the woods at 2am?? Which printer will you bring for those events?

[@11darkraven11]

What's a better way to do that wiring?

[@braedenday1652]

I’ll design and build a new printer every year or two for fun and this video just makes me want to do better. Nice work!

[@TheZolon]

Nice video. As mentioned, tinned ends bad. This is why we use ferrules on the positron.

[@Leclaron]

Watching this has inspired me to consider making a mini Lemontron, maybe a kumquat-tron

[@lunaumbra5179]

Best build video I've ever watched. Excellent effort!!! I am so jazzed this came out and I cannot wait to snatch up that toolhead pcb and get cranking on the DC input mod. Thank you so much for making my vanlife printing dream feel attainable. Have an excellent end of year Mr. Lemon 💕

[@AlanTuringWannabe]

The sound effects are top notch.

[@rrittenhouse]

LMAO for real! I loved it. Bro is actually pretty funny. Plus the video is great as well.

[@Diabl0pl]

Ok, that is amazing. I think that as soon as I finish my Pandora's Box I'll try to give it a try if i manage to get qll the parts where I live.

[@fish9468]

I've been looking forward to this video!! Thanks for taking the time to document your hard work in such an accessible way for so many people.

[@JSparrowist]

The sound effects are choice! Very cool build!

[@galgrunfeld9954]

This is absolutely fantastic! What are the limitations in scaling the print build volume?

[@gfixler]

The limitation is that if you go any bigger, it won't fit in a filament box, and that was kind of the whole point, for coolness factor, and bragging rights.

[@GoatZilla]

this is some pretty good work. serviceability suffers a little though. shouldn't you be tightening the hotend jibblies while it's hot though?

[@lemontron]

You do tighten the nozzle hot, but the cold side doesn’t thermally expand to the point where it affects leaks. Yep issues with serviceability are definitely there, specifically when you need to replace the heater or clean the hotend. I really just made some calls in the name of miniaturization, it’s all calculated for cost/benefit but it’s nothing a little more RnD can’t fix. Sample Name actually linked me a SMD finger that allows the heater to be installed toollessly.

[@Kasdejan]

Amazing, whats this nice ABS you used for the toolhead? Thats one of the prettiest filaments I ever saw.

[@BigEpinstriping]

Great design! very cool! That hotend is nuts!

[@garcy9983]

whats the estimate cost to build this? hardware-wise i mean not printed parts

[@ahrrr7690]

I seems like ages since I seen this for the first time. Happy that it’s finally coming out 😊

[@Mobile_Dom]

damn son, this has more flat head screws than i skipped over in the voron v0.2 build

[@lemontron]

You can use the same size button head but since you have to buy the wafers anyway for the x axis I just reused the same screw over and over again

[@adventureaeryck]

Dude, This is awesome! I really hope that the bill of materials includes tools and crimps

[@lemontron]

I understand where you’re coming from but you would never want to put a tool in any BOM unless it was a consumable. But yes I do have a list of required tools in the website and crimps ($20) are almost non negotiable, though if you were really for some weird reason opposed you could always work around it.

[@coledavidson5630]

Is this based on the positron?

[@lemontron]

Lemontron is the newest positron style printer and it shares many design decisions. Same print volume, but half the price, internal extruder as opposed to external, unibody chassis as opposed to plate construction, 0 cnc parts as opposed to heavy use of cnc parts, it has a bed mesh probe, and internal psu as opposed to external brick. I hope it proves to be a big innovation over the previous positrons.

[@JaCKoP619]

@@lemontron so it's basically modded positron for DIY construction? pretty neat!

[@FuttFel]

Is there a reason for going with screws that go into plastic, as opposed to just using more heatsets? Screws that go into plastic is almost a one-and-done type of deal and are extremely easy to strip out. The base is such a large print that it would suck to have to re-print the whole thing because one or two important holes stripped out. Such as those for the rails. Also, the kapton tape used later to hold down the wires, perhaps one addition here could be U-shaped channels that will accept those really small 2.5mm cable ties? Aside from that, fantastic work! Really looks like you one-upped all the other Positron variants and made one that's actually viable for most people to make! If I didn't already have a full kit and all parts printed for a Micron+, I would build this instead.

[@lunaumbra5179]

I am curious about why not more heat set as well. I'm happy to load it up.. Looking at the files there might be a couple places, or maybe one in the center of the y rail, which might not take a heatset well.

[@TOjoe1strow]

positron looks sick!

[@certified-forklifter]

please dont put solder in screw terminals! :/ it is a fire hazard

[@francoisrainville]

the sounds effects man!!!

[@wYatt121509]

SUBBED! You got me with the metric sized 'subscribe buttons'. Good humor and I like the content so far.

[@user-tw7oc1jb7d]

Dear, what would be changes if you wanted this to print 1x1x1 meter ? or that's impossible with upside down design?

[@lemontron]

Easy since it’s all 3d printed, just scale it up in the slicer

[@lunaumbra5179]

Scale it as in nothing is fundamentally different about the design but you still need to make an entire new set of models. . . Right?

[@nomadsgalaxy]

You could scale this up, but it won't work well. We've have had to completely redesign the frame for our experiments going beyond 220 cubed volume.

[@lunaumbra5179]

@@nomadsgalaxy what was the major engineering changed needed in scaling? Was it rails? A second z support?

[@nomadsgalaxy]

@@lunaumbra5179 the current bed is at a cantilever, and adding additional weight to it will cause the joints to eventually bow further than what is acceptable. Scaling up to just 256 and above requires and additional Z Rail at the minimum, which inherently changes the entire core design of the machine. It's a fun problem we're currently working on :)

[@aidendunlap9353]

From a durability and DFM standpoint fhcs shouldn't be used in 3d prints for anything other than cosmetic purposes, the outward tension can result it build up of stress and failure at the z seam for the hole.... most parts can often be switched to a countersunk bhcs

[@lunaumbra5179]

This is an interesting issue. I did not know you could get countersunk button heads.. would there be any good reason for keeping the countersink if you are switching to a button?

[@CharisPapas]

a 200x200x200 would be fanstastic. 180x180 is very limiting.

[@lemontron]

Hold that thought I’ll be right back lol

[@mmmuck]

Why would one build this versus getting an a1 or a1 mini

[@lunaumbra5179]

* portability - it goes anywhere and you don't have to fuss with someone else's printer. * Small living, tiny house, van life (that's me) , RV life, tiny city apartment * Remote work. The rare few where printing on the job anywhere could speed things up a lot. * It's badass * Bring the printer to your friend and fix their tool/issue with them instead of the back and forth, so long as it's a short print.

[@TheGeordietheWitchandtheWench]

this is a good effort!! thanks!!!!

[@NicksStuff]

I thought this had become a commercial project, a bit larger with custom bed etc. Did I misunderstand? Anyway, loved the video (except gluing the Capricorn tube, maybe?)

[@lunaumbra5179]

LDO made a kit. It costs 700usd.

[@lunaumbra5179]

And yes the Lermontron uses the custom bed and hot end LDO made for their kit

[@jupiterbjy]

next tier sound effects, love it

[@elyknavillus777]

Dude I never watch ads and always jump ahead for sponsors but you were halfway through it before I even realized it was a plug so impressed I didn't skip forward. Well done sir.

[@dreadnoughtandcrow]

nice one amigo. merry christmas :) xoxo

[@dennisvorwerk9210]

Wow, ultra clean build and really entertaining! Well one! :D

[@Kato0909]

That is a good project! Love it!

[@coledavidson5630]

What would this motion system be called?

[@lemontron]

This motion system is called inverted hbot, or some have coined it Positron system. It’s not corexy but the motor kinematics are identical.

[@jacobb1384]

now that was clean

[@mark6302]

thats awesome :0

[@riccardocaracuta8781]

Really well done, congratulations! Is it possible to have the names of the songs used in the video, especially the one at 18:48, thanks

[@dopamane8777]

wow what a good vid broski for real

[@user-tw7oc1jb7d]

amazing!

[@jellybob2pointo]

Can we get proper stl files? We don't all use fusion 360 and I'm personally not comfortable using 3mf files.

[@poetac15]

Nice work

[@bigoof1321]

I like the sounds effects reminds me of Jelly Car

[@lemontron]

I loved Jelly Car

[@repalmore]

I don't think I'll build a Lemontron but I subscribed because you did such a good job on the design and video, sound effects and all. ;o) Keep up the good work.

[@AlexHamre]

Can the lemontron print it's own body? As in, is does the body fit in the build area?

[@lemontron]

Build area is 180x180 and the body is 200x200.

[@dineshvyas]

This is the first video with sound effects that I liked. Well done sir.

[@MxJuneReese]

Would one be able to emulate the SampleName PCB with just some protoboard cut to proper shape?

[@InterFelix]

Probably. I haven't paid close attention to the mounting though, and protoboard with jumper wires would probably be thicker than the PCB. That could be an issue.

[@snowsh1ne]

Damn nice. Merry christmas :) Is that Bambu Galaxy PLA on the Toolhead? Looks really good

[@charliemartin327]

amazing work!

[@Devviiiii]

5:32 that little rap was fire xD

[@DoctorDerpman]

Okay I'm sorry but 5:35 vibes _way_ too hard 🔥🔥💯 Goddamn

[@aaronsisson1994]

Hyped! Thanks so much!!!!

[@Raven3one]

that build plate area is larger than my wanhao i3 mini!

[@Shenepoy]

music is so loud, better without music, other than that good to see another positron derivative

[@Max-ci9cv]

how is this expensive than an entry level 3d printer?

[@ethanchosdad-xh9ih]

My favorite part was when he went boing.

[@printerpr0n]

🔥

[@colinray171]

5:45 I prefer the mnemonic BlaG BluR

[@guythejedi]

I get it that it is open source and all but you can buy 2 A1 minis and mount them upside down Good concept though.

[@lunaumbra5179]

You could also mount your brain upside down if you circle the globe in the opposite direction as it spins 😇

[@ZappyOh]

Impressive!

[@fancytableshoes]

This is seriously impressive work! And the sound effects

[@TheWebgecko]

Your energy and the sound effects really elevate this!!

[@TheWebgecko]

My ADHD ass was locked in the whole time

[@lucymnt]

bars

[@JimmieColeman00100]

Anyone selling finished units, im a hobby user not a hobby builder.

[@mosesbeltran8390]

I came for the printer, but I stayed for the sound effects.

[@conceptor]

open source? 🤣

[@headhunter_4209]

I really hate this 3D printer it's just gimmick for the sake of gimmick

[@IkarimTheCreature]

Why are you so wise, and why do you give out your priceless advice for free?

[@lunaumbra5179]

It's not a gimmick for some. For me it's the only viable printer option given my lifestyle. I'm tired of using other people's printers and makerspace printers. It's always a mystery if they are in good condition or their quirks. Plz hate it harder. I think it likes it.