Kingroon KP3S Pro: A Tiny Fixer-Upper

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My Store: nathansellsrobots.com
Patreon: / nathanbuildsrobots
Discord Channel: / discord
Podcast: www.perfectfirstlayer.com
I have had a lot of request to review the Kingroon KP3S. How will this compare to smaller printers, like the Ender 2 Pro, and the Tronxy Crux? It is only slightly smaller than full-sized printers like the Ender 3, but can it compete on price and features?
The video description contains affiliate links. I receive a commission on qualifying sales
Kingroon KP3S Pro: amzn.to/3JaJk4E
MUST-HAVE Z-Axis Fix:
Solid Shaft Coupler: amzn.to/3ywLYgb
Nice to have upgrades:
PEI Sheet: www.aliexpress.us/item/325680...
Silicone Bed Springs: amzn.to/426BbGO
If belt is causing issues you will need to replace with this kit:
A bunch of links for Ender 5 S1 and Ender 3 S1.
Creality Ender 5 S1 (Amazon) - amzn.to/3V3iGzm
Creality Ender 5 S1 (BEST PRICE - Creality Store) - shareasale.com/r.cfm?b=201599...
Creality Ender 3 S1 (Amazon) - amzn.to/3gyRwkS
Creality Ender 3 S1 (BEST PRICE - Creality Store) - shareasale.com/r.cfm?b=201599...
Creality Ender 3 S1 (BEST commission for me - Pergear) - www.pergear.com/products/crea...
Creality Ender 5 S1 (BEST commission for me - Pergear) - www.pergear.com/products/crea...
Ender 3 Upgrades:
Sonic Pad on Creality Store: shrsl.com/3xtoi
Sonic Pad on Amazon: amzn.to/3SsSddV
0:00 Assembly
3:26 Belt needs Fixing
6:23 Bed needs Fixing
7:34 Z-Axis needs Fixing
9:48 Fan needs Fixing
10:50 Pros
12:54 Cons
15:32 Conclusion

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Опубликовано:

14 июл 2024

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Комментарии : 85

@vmjr748 Год назад

Great video! I appreciate the honest review. Can't wait to see the upgrades you're going to do.

@williammartinez7987 Год назад

Great review! I liked how you analyzed the mechanics and gave upgrade options.

@NathanBuildsRobots Год назад

Thanks, this one is taking a lot more tweaking than most of my printers to get working well, but I’ll do a follow-up. It’s almost like a creality machine-a diamond in the rough!

@williammartinez7987 Год назад

A similar 3D printer is the Aone 2 by Flying Bear. It has no reviews in English and I’ve been hesitant to buy one without a review.

@stefanguiton Год назад

Great videos as always

@NathanBuildsRobots Год назад

Thank you Stefan

@3DPrintSOS Год назад

Dang we had quite different experiences with this machine. Shame, really. It’s definitely become one of my favorite little machines to mess with. I have a Pheatus BMO in an afterburner, klipper, and rails on the y. Obviously, if you add those things to anything, it’s going to get better…but this little thing is light, portable, easy to mod, and easy to keep next to you on a desk. It’s been super fun.

@AndrewAHayes Год назад

Me too! my little Kingroon is a much loved printer, mine did not come with the springy coupler and the fans are much quieter than the ones on Nathans machine and Im pretty sure the belt tabs on mine face up, Im not at home though so I cant check.

@NathanBuildsRobots Год назад

I’m going to keep on it. The linear rail setup is ideal. Mine is a fixer-upper but I’m not giving up on it yet! I’ll watch your video to see if I can spot any differences in the build. Will also try some different filament, though I’ve used this stuff before and didn’t notice anything grange like these whimsy prints!

@mikejones-vd3fg Год назад

@@NathanBuildsRobots dude.. the springy couplers are an upgrade, austrlian printer guy upgraded to them and got flawless prints after, took out all his ringing, ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-6UgT9YqY3UA.html&ab_channel=TeachingTech I had them in my shopping cart last night actually but decided to just install the rods from scratch properly, didnt have any z issues but i thought id rotate my rods and after doing that igot some, so after looking into it, i found out i didnt install them properly, mainly leveling the gantry parallel. MY printer came assembled so this stuff you dont learn and kind of wish they gave you the instructions to install the printer from scratch, how things should go and what order to get it at leaste to spec.

@sarganis2576 Год назад

Why rails on a bedslinger? Especially on Y which is the bottleneck?

@timothymusson5040 Год назад

@@sarganis2576 what do you mean? Will linear rails on Y slow it down?

@grathado28 Год назад

Oh my God a 3D printing podcast I definitely need this in my life😅

@NathanBuildsRobots Год назад

We are finally on Apple Podcasts. Took a little while to get cleared on there, but we got it!

@grathado28 Год назад

Work to get video eventually 😊

@nickrudd2568 9 месяцев назад

I brought a assembled but never run Kingroon KP3S to keep me interested while my two Ender 5 plus's were suffering from the 'I can do that' after watching youtubes that show how super simple it is to totally upgrade it all. Its not for a Lorry drivers mind. lol. Back to the Kingroon, Its not stopped printing apart from the duff Z screw clamp stripping the two threads the bolt reached and then the hotend mares it had to start with. Its now running a proper V6 hotend and not the copy thas standard. I used silicon bed springs, its not needed levelling since fitting them and the PEI bed or the Glass one i fitted before. They are cheap but they work well imo. Finished a 26hr print last night and it was flawless. Wackes benchies out quickly too.

@brandoneich2412 Год назад

@4:45 You don't want to press delete through against the stepper motor shaft. what I recommend instead on this style of motor coupler is to use a 5 mm ball bearing in the motor shaft and the lead screw. That way then your lead screw is not sitting perfectly flat on the motor shaft, which would prevent it from being able to make minor adjustments in the x and y direction which is the main reason for this spring style coupler.

@NathanBuildsRobots Год назад

Interesting. Do you have a product name that I can check out? I’d pick some up. I’m currently using a rigid coupler, will see how that works z haven’t printed with it yet.

@brandoneich2412 Год назад

@@NathanBuildsRobots check out Alex Kenis's video "Viewer question: the ball bearing trick?" You'll better understand what I mean. :)

@Avets610 Год назад

I bought some couplers for my ender 5 plus Z axes and they already came with bearings. They seem to work well.

@ruyvieira104 Год назад

Or to use a flexture part to allow the brass nut to wiggle in x-y plane while the nut moves on the z-axis with negligible interference

@grabejud Год назад

great review, i had mine running almost 2 months now, thank god the fans are holding up. i agree with most of the points here namely the metal locking belts are crimp lazily and will hit your prints when doing one at a time print, i plan to recrimp mine. the springy coupler i didn't have much issue with it but awesome time to just get a solid one. included glass build plate sucks, when it sticks sticks too much, i need to have a hammer beside me to remove it, best mod is to change to magnetic TEXTURED pei sheet. hotend can definitely be improved further with lightweight setup and motor (thinking of orbiter v2). I haven't opened up the electronics to check if the power leads are ferruled..worth a check

@dalem04 Год назад

So, as Brandon mentioned before, you can do the "ball bearing trick" with the sprung couplers. Another video on Alex's channel which is interesting is "BFTB design: Z axis wobble, lead screws and bearing blocks" in which he discusses how to use couplers more effectively. The design of coupling a lead screw vertically to a stepper motor and using the stepper motor bearings is really another "good enough" holdover from the rep rap days. Most couplers are simply not designed to transmit force along their axis in this manner, neither are stepper motors really. It's more complicated and expensive, but using thrust bearings and having the weight be taken by a frame is really a much better solution.

@DARKredDOLLAR Год назад

Exactly as you say. I used to work and build the open builds style cnc machines years ago and one thing I was baffled about when I recently picked up a 3d printer was how wrong the motion systems one these are designed. No wonder that not a single printer prints perfectly out of the box.

@NathanBuildsRobots Год назад

Very interesting indeed. These are not precision devices, they are just “good enough” to print trinkets in many cases. Thank you for the detailed explanation on Z axis wobble, I’ll check out BFTB Design video

@TheExtremeElementz Год назад

Bro I hope you know how much your review style with the seriousness and joking parts are something special. I enjoy your humor and appreciate your wisdom on these reviews it helps decide what direction to take but at the same time gives good feedback about mandatory upgrades like that spring piece (that shouldn’t be springy) on the Z axis. You had me rolling when you’re smacking that part with the wrench. 😂 Then the last bit talking about the quality of 3D printed parts. Hilarious! Have a great day.

@NathanBuildsRobots Год назад

For some reason it has amazing bed adhesion but terrible interlayer bonding. Not a good combo! And thank you for your kind words. I’m in this for the lols.

@Hanzi2u Год назад

great hands on with the machine , i'm not looking to buy anymore printes since i already got 4 lol , but it's always nice to see a review from you and it's nice with those little funny zits in betweeen

@NathanBuildsRobots Год назад

4 printers?! You have a problem! Hey don’t make fun of my acne!

@Hanzi2u Год назад

@Nathan Builds Robots hey! I'm just having a good time TL:DR I bought bigger printers for bigger projects , my newest addition is my elegoo saturn s haha , the crazy part is the last 3 printers I've bought it within a 2 month span , firstly I decided to move on to bigger printers, from my ender s1 pro , which then persuaded me to the x2 sidewinder, it then broke itself somehow with thermal, then I discovered elegoo, and the week after I had my x2 , I bought the Elegoo neptune 3 plus which I absolutely Loving the shit out of , installed klipper on it , and then I delved into the resin hole

@Hanzi2u Год назад

@Nathan Builds Robots one of your videos , convinced me to buy the X2 and I thank you for that because it's a great machine, I just had a faulty one , which is under repair now from retailer

@axelSixtySix Год назад

Hi there. Thanks for the video. Spring couplers must be installed in tension, I mean the motor's shaft and the lead screw must be forced in contact by the coupler spring to work properly. Of course the motor's shaft and the lead screw must have flat ends, but they're meant to be this way. (Edit,: this is what you ended doing at the end). If installed properly a spring coupler is still better than a rigid one which requires very precise transmission and alignment. If you want a more rigid coupler, have a look to spider couplers.

@mikejones-vd3fg Год назад

I was actually about to order some of those flexible coupler sthe other night, they are suppose give some play so it doesnt bind and improves quality, which is what causes Z issues the binding, not wobbling, that being said ive decided to skip the flexible ones and install the zrods from scratch and have them lined up nice so they dont bind, or more straight as theres already some play in the top thread for that purpose. Adding the flexibility at the bottom i think just helps with this. That australian guy's printer channel mentioned them and he got good results upgrading to them, so its kind of cool to see them on this.

@Avets610 Год назад

2:20 exact same train of events brought me to that... With the same result! 😅 I wonder how many ppl had the same issues... Also same thing with the noisy fan! Seeing this video is like riviving my original experience with this printer 😂

@NathanBuildsRobots Год назад

Haha glad I’m not crazy, being the only person with these issues. At its core it’s a good design, but the QC could be better!

@disturbedfan545 Год назад

You're the only reviewer I trust art this point. Who would have known chinesium sucks?

@NathanBuildsRobots Год назад

It’s important to understand what alloy and grade of Chinesium your printer is made of. It ranges to slightly stronger than butter, to excellent 85% of the time. Seriously though, the importance of QC testing cannot be overstated! My modder boards have a failure rate from the factory of about 1 out of 100. Close enough, right? I should just ship them out like that, right??? Wrong, even 1% failure is unacceptable to me, because I would never want to send out faulty product. I designed a test rig to get it down to something more like 1/1000, 3D printer manufacturers should do the same. Just like Mac, I’m sure they have all sorts of automated testing to guarantee with near 100% certainty that when you unbox a new IPhone, it works. You can’t leave it to manufacturing tolerances wether the product works or not, for something complicated, like nearly every single electronic device, you need testing to close the loop on quality control. May seem like a small difference to some, and probably wouldn’t affect sales if every once and a while someone’s printer randomly blows up when using my product, but I do not take failures lightly. When people do have issues I know with near 100% certainty that it is user error because of the testing I do, and even user error I take partial responsibility for. Products should be easy to use, and a responsible designer should take any failure seriously.

@pecky38 Год назад

I have a KP3S Pro S1 which the only difference is having the linear rail on the Y axis. To be honest, I've very good experiences with this machine and able to push it to print a

@Lurker1222 Год назад

Kingroon... Kingroon... Kingroon...

@omgfrankie Год назад

Switches cause stitches. Nathan bro your a hoot.

@anwyll Год назад

Think that springy coupler is to give greater tolerance to a not so straight lead screw against the linear rail on the Z axis. Probably lets them use cheaper leads screws with less warranty issues.

@NathanBuildsRobots Год назад

Yeah… kind of funny, they use a hardened steel rod to provide strength and stiffness. Then they go and put a spring on it. That will make it skate up and over imperfections in the previous layer, and the print head may settle at a slightly different print height after the disturbance. Also you have the issue of reduced point pressure where the nozzle is laying down plastic. Maybe the weight of the toolhead is enough to restore the toolhead to the same position every time… but what if it’s not? Also the smooth sliding linear rails tend to have slightly more generous clearances to keep things running smooth, but might be a little worse at holding a precise position.

@LostInTech3D Год назад

I've always wanted a belt printer. Nice work!

@Wombat19 Год назад

A new video :)

@AndrewAHayes Год назад

All they test are the hot ends once they are assembled, I have this machine and I could swear that the belt tabs face up on mine, Im not at home at the moment so I cant check, but Im chomping at the bit to get home and find out, one thing I am certain of though is that my KP3S Pro does not have a springy coupler and the fans are much quieter than yours, I wonder what the deal is with those, have they found cheaper parts to fit to this model?

@NathanBuildsRobots Год назад

No idea if they changed sourcing. I got this from zbanx in November. It may have worked if I just reversed the belts, or just trimmed the rubber nub that was sticking out.

@MetalRhino42 Год назад

the springiness is ok if you add a ball 1/4 inch ball bearing to sit under the lead screw. the ol' ball bearing zband fix.

@NathanBuildsRobots Год назад

That is very interesting. I have not heard of that fix until now, but it’s worth a try

@AdrianoCasemiro Год назад

If quality control is non-existent, the manufacturer would be more reputable to sell this printer completely disassembled as a kit. That would lower the cost further still, making this an offer I couldn't refuse.

@GuysShop Год назад

Another great review brother. Too bad there are a few poor design choices in the machine. Sometimes they are excusable, but in this case they are resulting in bad prints, or even not being able to print.

@grathado28 Год назад

Bro he hates white noise lol

@NathanBuildsRobots Год назад

I review 3D printers, not jet turbines 🙉

@rarespaul9503 Год назад

thx fore your review. I really wanted to see what you think about this printer, becouse all the other reviewers on youtube just say "that is the best and just go ahead and get it" but that's just a load of crap. I apreciate your honest opinjon

@AndrewAHayes Год назад

Nathans machine has totally different parts than earlier iterations of this machine, mine does not have the springy coupler or the noisy fans and Im pretty sure the belt tabs face up on mine, I have had no issues with this printer at all, I bought it while I was working away from home in the Netherlands, I had it in my hotel room and slept with it doing overnight prints.

@ferrumignis Год назад

You claim that all the reviewers except one say it's a good printer, and you choose to believe that one over the majority?

@rarespaul9503 Год назад

@@ferrumignis well now that you mention it dose sound a bit extreme, you know what i meant ;

@NathanBuildsRobots Год назад

Idk what it is, but I get a lot of bum printers! But I’m not going to recommend something that is clearly having issues on my desk. Maybe it’s the desk that is causing all the issues!?

@NathanBuildsRobots Год назад

In the pictures I saw on Amazon the coupler looked the same as mine. Let us know when you have a chance to check your printer. It really does seem like a sturdily built printer with a good frame. I’ll keep on it until it starts printing right.

@noobsfansub Год назад

I appreciate what they tried to do with the KP3S pro, but it seems like all the changes they did made the printer very finicky compared to the original. The vanilla KP3S with the titan extruder is a real workhorse, it shows sometimes that less options with reliability is better.

@louis-philippeyargeau2497 9 месяцев назад

I'm considering buying my fourth printer just for the fun of having something new and different (and still hurt with my bad K1 experience!). I wonder if this KP3S is relevant now that we can by a Ender 3 V3 SE for not alot more money 🤔

@NathanBuildsRobots 9 месяцев назад

V3SE would be a better buy IMO. Sorry to hear about the K1, I have heard a lot of mixed experiences with it.

@luciosacramento 5 месяцев назад

I already searched for a solution and didn't find anything about it. you are my last option. I'm trying to make a print that in total will take 21 hours. The problem is that halfway through printing between 50% and 70% the nozzle stops heating and the filament stops coming out. The printer continues to move. Does anyone know how to solve it?

@queerchameleon Год назад

Do you recommend this over the CRUX 1 ?

@NathanBuildsRobots Год назад

The crux I received had a lot less problems, only real downside was a fine bumpy pattern that I discussed in my video. Both are great but based on the sample I received I would go with the crux, just keeping in mind the print quality will be 8/10. This one still has some unresolved issues, I’ll be fixing it up just to see if I can get it working well.

@samhughes1747 Год назад

Use the spatula!!!! Spatula against the bed, angled-side up, against the side of the print, and smack the back of the spatula! I wince whenever I see anyone swinging at their print!!

@mysfiring Год назад

I wonder how much effort it would be to adapt an Ender-3 esque Y-carriage/bed onto this and stretch this (longer extrusions/rails aside) printer so it could do 235x235xwhatever-its-stock-z-is? Of course you could buy an Ender-3, but it wouldn't be as compact as this is!

@sarganis2576 Год назад

At that point the machine will be either non-functionla or suuuper slow due to: 1) Lack of stability in Y due to the momentum of the heavier bed+cattiage assembly (that's already a bottleneck for all bedslingers) 2) Lack of stability in X gantry along XZ plane due to longer shoulder at 200+ on X (solved by the second extrusion + X carriage on Enders). IMHO 210x210 (the real size of the bed) is already pushing the limits.

@petercallison5765 11 месяцев назад

Looks like he forgot the bolts that go in through the bottom, lucky he got any prints to work.

@BillyBonesYT Год назад

🤦‍♂️what's with the deez 🥜 jokes again 😂

@AdrianoCasemiro Год назад

Quality control? Never heard of it...

@C4mpblor Год назад

0:42 gottem

@Deathbyfartz Год назад

i mean unless you want to pay a huge premium for all your machines like with prusas, then youll have to just get comfortable with the fact that testing machines don't really happen :P also when companies use these shitty spring couplers, you need to make sure the lead screw and the rod coming out of the motor meets in the middle of the coupling, especially since they use a bearing to confine the top of the lead screw, else you might end up bending your lead screw, and then your machine will most certainly get stuck at a a specific height everytime, linear rails dont allow for much tolerance.

@venenolento 10 месяцев назад

I think your fan is faulty mine doesn't do that sound.

@sarganis2576 Год назад

ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-X2LC-5BdF0Q.html Have you checked that Z extrusion is perpendicular to XY plane? There is some play in that assembly.

@petercallison5765 11 месяцев назад

He forgot to put the two bolts in the bottom, they are the one that keep it vertical.

@malandr1 Год назад

Ok... so 60% of your issues came from your tinkering and mistakes. Good to know it's still a good printer to buy if we don't mess with it unnecessarily like you did.

@mrgingersworkshop 11 месяцев назад

Just got the S1 version. It had the same issues out of the box plus a couple extras like a warped bed, burrs in the coupler, misaligned x axis, misaligned hotend/extruder. It had a raft of issues that honestly were unacceptable even for a $200 printer.

@urgamecshk Год назад

Not any mention of how the Y axis belt is held on with a nub and no tension system? Shame. Weak review!

@razumskiy 3 месяца назад

So you break the belt and then say the machine is broken on arrival😂😂😂 absolutely unhinged😂😂😂 Edit: holy shit, not even the belt. He basically took perfectly fine printer, broke it and then complains 😂😂😂😂