🔴 She Won't Blow - Quick 861DW Air Pump Repair - No.1085

[@Mymatevince]

Great video Scott especially explaining the flow of the injection moulding 👍👍

[@TheDefpom]

Thanks Vince.

[@fouroakfarm]

Nice fix. 3D printers are great. Certainly not something used everyday but when they are used, they sure are handy

[@TheDefpom]

Indeed

[@duncho1]

You are awesome, thank you mate for sharing the propeller 3D files!!!

[@bubbatennessee7531]

I am wondering if this air pump can be replaced with a 110V air mattress inflator pump ? Its size looks like can fit in there, it is cheap and widely available in places like Walmart.

[@xConundrumx]

I would have solvent welded the broken one. Been doing that a bit lately ever since I discovered PMMA S-Polybond. It is insanely good. Even on PLA it doesn't actually glue, it is a solvent that dissolves the top-layer of the plastic (different sorts too, acrylic, pla, etc) and when it evaporates a few seconds later the plastic hardens up again and makes an insanely strong bond. Only thing you have to remember is that it does not fill gaps, the two parts have to touch. It has the consistency of water so it can creep into cracks easily too.

[@mrpetit2]

Interesting. I looked up the datasheet. Normally I use MEK (butanon/methylethylketone) for this, but S-Polybond is methylacetate with a tiny bit of methanol (

[@TheDefpom]

I haven’t heard of that one, it certainly would be good to have at times.

[@hoggif]

3d-printers are so great for those one-off plastic replace parts! (and so great for making custom enclosures that everyone making electronics needs or finds at least usefull) I make a lot of one-off stuff. The last part I printed was a one-off holder where I can clip a snow shovel on. Bought one general clip on holder, but it was of unsuitable size and I printed a better one that fit the wall better with that exact shovel..

[@BSFPC]

I'll have to open up my 861DE to see if it shares the same fan assembly. Thanks for sharing!

[@lpeter1172]

does it?

[@BSFPC]

@@lpeter1172 I have yet to take it apart - once I do I will be sure to leave a reply here!

[@TheEmbeddedHobbyist]

I use my 3D printer for all sorts of things around the house. Door hinge spacers are great, I make a set of varying thickness so I can get the door to hang straight. Plus you can match the colour to the paint work.

[@TheDefpom]

Nice idea

[@ricksampson6780]

Excellent repair and 3D printing application, have you considered 3D printing ferrite coil formers?

[@TheDefpom]

Can’t say I have

[@ricksampson6780]

@@TheDefpom Please give it a go, very useful for custom E, ETD, PQ etc core applications. I'm sure your viewers would appreciate a video on this subject, cheers.

[@VictorSilva-rq4kz]

I commented about this in EEVBLOG years ago. Mine failed after 6 months. I was able to get a new one out of the supplier. I was really surprised how flimsy and weak the main working part in these blowers is. I tried without success to get replacement parts from the manufacturer and was blown off. Where did you order the blower fan from?

[@TheDefpom]

I found it on aliexpress: s.click.aliexpress.com/e/_DCdwGUX

[@canadavey]

Great repair vid! Now that you have plenty of blower motor parts, the blower motor won't be the next thing to fail on the unit... ;)

[@TheDefpom]

That is usually how it works

[@hectorpascal]

Your analysis of the defect was very professional. Do I detect that your day job has something to do with injection moulding? 😀

[@TheDefpom]

I have experience in the plastics industry yes.

[@Arek_R.]

Seems like a widespread issue if there are multiple files on 3D printing sites... Perhaps the plastic was too hot or the mold was too cool or both and there was a lot of stress in the material as it cooled down. Also why did they use some PC? If they would use ABS which is softer it probably wouldn't crack. Or even better use PBT with addition of CF.

[@TrimeshSZ]

I suspect that is stress cracking caused by solvent vapors getting sucked in through the fan.

[@tgsoapbox]

Random question - Did you get IC shaped heads for the unit? I've been thinking about getting a couple for my unit (not the same as yours, just some random hot air unit) - Wondering if you did and if so what your thoughts are on them.

[@TheDefpom]

I know it is possible to get them as I had looked at them at one point, but then I remembered that I'm too lazy to change them out LOL, I would have thought they would be good to use on larger QFP IC's.

[@LuisRamirez-ty1rd]

Which of the two links worked for you in the quick

[@JonnyFix]

That's the spirit, well done! Also I can never get small holes to print to size either. If I want 3mm hole I need to sketch it at like 5.5 or something, or print with enough shells to give some meat to drill it out a little, or just print it solid and drill from scratch.

[@TheDefpom]

I’m still running my setup, as you saw it is only about .4mm under now.

[@daaudiome]

Greetings from argentina, I just ended up here, as I was doing some repairs tonight and suddenly heard an explosion coming from the unit. first I thought would be some PTC exploded or fuse, but to my surprise the impellers was borken in pieces. Will try to glue it with cyanoacrilate. But I'd like to 3d print from the designs , which one works better? thanks again

[@TheDefpom]

The one I used in the video is still working fine for me, it hasn’t failed again yet, I suggest going straight to the updated design though.

[@daaudiome]

@@TheDefpomexcellent so I'd use the updated sandwitch design much better right?. This it the one you designed. Also I was thinking on trying printing with my resin printer instead of my normal filament PETG what do you think?

[@henrysalasquintana703]

Hola querido , como te fue con la impresión ? Pudiste solucionar soy de argentina también y me pasó lo mismo 🤦🏻‍♂️ si podes contáctame así me ayudas hermano por favor

[@t1d100]

Good job.

[@TheDefpom]

Thanks

[@helmuthschultes9243]

Good job...

[@TheDefpom]

Cheers

[@FixDaily]

After this mod, is it still working fine?

[@TheDefpom]

@@FixDaily yes, hasn’t failed again yet, of course it won’t now that I purchased a spare blower for it.

[@karimlazher6628]

J ai la meme machine commet je peut comande la meme pièce Merci.

[@Taras-Nabad]

How much do these cost.

[@300maze]

do you still recommend getting this hot air station? or should i avoid it

[@TheDefpom]

@@300maze it is good, just watch out for the fake ones out there.

[@300maze]

@@TheDefpom the unit in the video is a fake? where do you recommend buying a genuine unit if im not in the US?

[@TheDefpom]

@@300maze this is NOT a fake this is a real one.

[@Johadart]

Great fix video Scott, I’m looking at a Creality 3D V2 upgraded version, would you recommend that unit for a new person to 3D printing.. ?? Keep up the great videos mate.. 🤙🏼🇦🇺

[@TheDefpom]

I have n happy with it, the only upgrade I think it has to have is adding a magnetic sheet on top of the glass bed, to make it easier to get parts off, the Z upgrade I did recently is also nice, but not absolutely required.

[@Johadart]

@@TheDefpom cheers mate, I appreciate it greatly 🤙🏼🇦🇺

[@simontay4851]

With how much these quick hot air stations cost, I would've expected the blower impeller to be better quality than that. Why use such brittle thin plastic then bodge on an aluminium plate . Even a single piece of injection molded ABS would've been stronger. An impeller made of aluminium would've been even better. The impellers in vacuum cleaners are aluminium.

[@TheDefpom]

Yes I agree it should have been a better quality than it is.

[@LuisRamirez-ty1rd]

@@TheDefpom which fan did you use of the 2 links you left I have the same problem maybe you can help me

[@SeanBZA]

The fan probably cracked because the plastic lost plasticiser, and also yes the flow lines, but likely also poor balance. You probably would get better airflow with it being slightly smaller diameter, as that then allows higher flow in the outside area, which, to work well, should be a constantly expanding volume from the exhaust side, so the air is constantly being added to the flow the entire circumference, instead of only really the last section adding flow volume. But I guess that was too hard to put into the mould, so constant diameter and poor performance is it, and the resultant pulsation creates stress in the impellor.

[@TheDefpom]

It could have made been made better.

[@warrenstamps6553]

Nice job,

[@TheDefpom]

Thanks Warren

[@NicksStuff]

Since you're happy to glue the impeller, why not glue the original one back together?

[@TheDefpom]

It was a stress fracture, it will crack again.

[@NicksStuff]

@@TheDefpom in 5 to 10 years, you mean? 😬

[@skeggjoldgunnr3167]

Iss beezin raysiss on ya! Tryna keep yer proeepoles DOWN man! Check out their newer updated high-speed low-drag version! It's all sexy and stuff. Quick TR1300.

[@TheDefpom]

The power switch is on the BACK of the TR1300... no thanks, I hate rear mounted power switches, why put a control you HAVE to use every time you use the unit on the rear of the housing, that is just stupid.

[@skeggjoldgunnr3167]

@@TheDefpom My Hakko FM-203's feelings are now hurt. !!! Who would HIDE the power switch of ALL THINGS on the BACK??!

[@Mixa007Master]

У двигателя очень и очень большие обороты. Внутренний вентилятор крыльчатка должны быть хорошо сбалансированны и все поверхности быть очень очень ровными. Если эти условия не будут соблюдены, то напечатанную крыльчатку так же разорвёт.

[@kakkoishonen]

I'm surprised this Expensive Quick Hot Air station has a cheap air pump compared to a cheap chinese model like the KADA 852D which has a bigger and great quality air compressor inside it...

[@Chriva]

Oh dear. I fear it might be time to find a new one.

[@TheDefpom]

Pfft.... you just know I will fix it !

[@Chriva]

@@TheDefpom Ofc I do. Your wizardry is legendary but with a title like that, you know I couldn't resist lol.

[@explay1000]

👌👍

[@chinaphonefixteam6300]

QUICK 861DW professional mobile phone repair and repair station, using brushless vortex fan, adjustable air volume, wide range, can be used for a variety of purposes. The system has the function of automatic cooling of air volume, which prolongs the life of heating elements and protects the hot air handle.

[@TheDefpom]

If you are try Int to subtly advertise your brand maybe send me stuff to review instead 👍

[@Irilia_neko]

The original is clearly polystyrene

[@TheDefpom]

Yes it is clear Polystyrene... LOL.

[@Irilia_neko]

@@TheDefpom polycarbonate in this environment will stay strong for the eternity