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QU-BD MBE Extruder v9

Posted by nefermu 
QU-BD MBE Extruder v9
December 19, 2012 02:38AM
I am planning to buy this extruder. Do you recommend it ? It looks proffesional and cheap when compared to a geared extruder + hot end.


http://store.qu-bd.com/product.php?id_product=11


[www.3byazici.com]
[3dprintertr.com]
Re: QU-BD MBE Extruder v9
December 19, 2012 04:12AM
1.75mm filament is a lot more expensive than 3mm filament, so that fact the direct drive extruder is cheaper soon becomes irrelevant.


[www.hydraraptor.blogspot.com]
Re: QU-BD MBE Extruder v9
December 19, 2012 07:32AM
Anecdotally I have heard quite a few people having issues with this extruder.

Personally, I think the design is poor and their feed gear tooth profile is far too aggressive. I also prefer 3mm filament.

I would not recommend it.

If you explain what printer you are buying an extruder for, we could probably recommend something that has a proven track record.
Re: QU-BD MBE Extruder v9
December 19, 2012 07:53AM
the price difference between 1.75mm and 3mm filament really depends on where In the world you live, i understand in the states there is a huge difference, however here in australia we've got suppliers dropping 3mm altogether in favour of 1.75

personaly i'm tempted to buy a qu-bd extruder myself but i can tell straight away that drive gear is going to be a problem, you can buy replacement gears which will work for it, i also make some myself from aluminium which makes a difference when using stepper motors that run on the hotter side of things
Re: QU-BD MBE Extruder v9
December 19, 2012 08:22AM
I have this extruder. I got it to go with my repstrap. I was totally new to 3d printing, and I spent months getting it to work right. By now I have extruded about 10 lbs of filament (since october).

The thing to remember is that it is a MK8 or MK7 clone. So when tuning it it is much better to look at the problems people are posting over at makerbot google groups and than here, where most people have J-heads or whatever. It needs to have a well tuned printer behind it otherwise it will fail a lot. Being off on temperature, of feedrate, even by a little will cause chronic jams.

You should read all of the makerbot google group "extruder stopped extruding threads" first. When it works I love it. When it fails I hate HATE HATE it. Also check out the forums at qu-bd.com. There is good advice on how to get it working.
Re: QU-BD MBE Extruder v9
December 19, 2012 08:32AM
I bought one, but have not used it yet. The price sure was right.
I've since bought a j-head and will be using it for my first extruder...
pfinucan sums it up well.

Official QU-BD Troubleshooting & Support Forum


--------------------------------------------------------
Custom Mendel90
Ramps 1.4 w/ smart LCD controller
Wade's Extruder w/ 0.5mm J-Head
Silicone rubber heater

[imogal.wix.com]
Re: QU-BD MBE Extruder v9
December 19, 2012 03:30PM
No, I do not recommend this extruder, unless you want a cheap headache. I ended up going back to a makergear hotend.
Re: QU-BD MBE Extruder v9
December 20, 2012 12:28AM
I think that most important part of a 3D printer is extruder & hot end. I am currently using Greg's extruder and the hot end on the below page. I am not happy with this combination. Gears skipping, oozing, hobbed bolt gets tightened during printing (dunno why ). I think this is related with print quality of Greg's extruder that I have. Several times when I observe skipping, I stop the print and release the latch and push the filament by hand and it flows very easly then untighten the hobbed bolt continue to print.


I need a prooved extuder / hot end combination and also a high quality supplier.



http://www.ebay.com/itm/2x-HotEnd-Fully-Assembled-and-Wired-FREE-Hobbed-Bolt-RepRap-3D-Printer-Hot-End-/281040096095?_trksid=p5197.m1992&_trkparms=aid%3D111000%26algo%3DREC.CURRENT%26ao%3D1%26asc%3D14%26meid%3D4284497046205225111%26pid%3D100015%26prg%3D1006%26rk%3D1%26sd%3D281040096095%26
Re: QU-BD MBE Extruder v9
December 20, 2012 07:17AM
nefermu Wrote:
-------------------------------------------------------
> I need a prooved extuder / hot end combination
> and also a high quality supplier.

The Greg's extruder is proven. Try replacing the nuloc nut with two regular nuts tightened against each other, that will prevent the extruder from tightening up.

As far as that hotend, I have no idea on its reliability. Proven ones include the Arcol, J-Head, and Makergear hotends.


Cameron

Help improve the RepRap wiki! Edit the following page to add suggestions, comments, pages that need updated or fixed, etc.: http://reprap.org/wiki/To_Do
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Re: QU-BD MBE Extruder v9
December 22, 2012 06:38AM
Just found this well written review of the QU-BD

[www.buildlog.net]
Re: QU-BD MBE Extruder v9
December 22, 2012 08:34AM
Prober Wrote:
-------------------------------------------------------
> Just found this well written review of the QU-BD
>
> [www.buildlog.net]
> u-bd_extruder_improvements


So basically you buy the extruder and have to rebuild the entire drive system? That doesn't seem like a good deal to me.
Re: QU-BD MBE Extruder v9
December 22, 2012 10:36AM
i have 1 and a half from the kickstarter !

i say half because the second 1 is damaged not got round to speaking with qudb yet about getting it fixed (machine hole is missaligned)

i wouldnt go with these for reprap no chance. plane and simple they just dont fit the carriages well at all.

plus it was a nightmware to assemble i just couldnt get the nuts and bolts to stay tight.

also when i did get 1 working it was ripping the pla to bits ! the filament presure is simply pushed by a grub screw which comes loose easy.

add the fact that its 1.75mm which is loads more money.

i bought 100m of PLA and have these extruders just sittting here doing nothing.

Hopefully they may fit the prusa 3 design better as there verital x bars

Get some 1 to print you a gregs extruder and get a J-head you will get a load more support with this. Then when prusas hotend is out get that as that looks the best yet.
Re: QU-BD MBE Extruder v9
February 23, 2013 03:05AM
it's a makerbot clone with the exception of the drive gear. bought 2 during kickstarter.. messed with it for days and like everyone is saying the gear just shreds the filament. the only mod i made was buying a new makerbot style gear from an ebay source ($12.00 USD +$4.00 shipping ) and it's been working great every since,, PLA and ABS.. I would buy another if I needed an extruder and I'd buy the gear at the same time( there are stories about people modding the original gear as well if you want to go that way) . I'm not spending $200.00 for a makerbot extruder when I can get this for $63.00 + $16.00 . plus there are plenty of people having trouble with the makerbot extruder as well. Most make the idler bearing holder , I haven't had to do that yet... and most certainly arctic silver epoxy the thermistor to the hot end..
Re: QU-BD MBE Extruder v9
February 23, 2013 04:29AM
Doe you run this extruder on any type or normal reprap carriage?

i have mine just sitting on a self with the other not working in a box sad smiley

i found that its near impossible to easily mount it to a moving X Carriage
Re: QU-BD MBE Extruder v9
February 23, 2013 01:27PM
dose the artic silver epoxy really take that much heat.?

i am very close to getting that extruder, when i do though i will make the bearing mod for it.

cwalker1960 Wrote:
-------------------------------------------------------
> it's a makerbot clone with the exception of the
> drive gear. bought 2 during kickstarter.. messed
> with it for days and like everyone is saying the
> gear just shreds the filament. the only mod i made
> was buying a new makerbot style gear from an ebay
> source ($12.00 USD +$4.00 shipping ) and it's
> been working great every since,, PLA and ABS.. I
> would buy another if I needed an extruder and I'd
> buy the gear at the same time( there are stories
> about people modding the original gear as well if
> you want to go that way) . I'm not spending
> $200.00 for a makerbot extruder when I can get
> this for $63.00 + $16.00 . plus there are plenty
> of people having trouble with the makerbot
> extruder as well. Most make the idler bearing
> holder , I haven't had to do that yet... and most
> certainly arctic silver epoxy the thermistor to
> the hot end..


[mike-mack.blogspot.com]
Re: QU-BD MBE Extruder v9
February 23, 2013 02:09PM
No the spec says < 150C.

Use fire putty exhaust assembly paste. Cheap and works very well for cementing thermistors and heater resistors.


[www.hydraraptor.blogspot.com]
Re: QU-BD MBE Extruder v9
February 23, 2013 02:12PM
thats what i read too, i just was not sure if i missed another product. that i did not know about.


[mike-mack.blogspot.com]
Re: QU-BD MBE Extruder v9
February 24, 2013 10:17AM
Deep Cool Z3 has an advertised temperature rating up to 300C. [www.deepcool-us.com]
The container is pretty convenient for reuse too.
Re: QU-BD MBE Extruder v9
August 16, 2013 09:29PM
Don't touch the QU-BD. I have heard mainly bad reviews and could not get the one I bought working properly either. Get this one instead:
www.aliexpress.com/item/Hot-Sale-100-brand-New-0-4mm-Nozzle-Extruder-Print-Head-for-3D-Printer-Free-shipping/1011128915.html
Shit-hot value at $70 inc.l freight for all metal construction and encased silicone hotend with fully integrated temp sensor.It runs a springloaded pivot arm with a straight gear against a grooved bearing. This gives very reliable filament traction. All parts are machined Al machined billet.The delivery tube is M6 stainless, just as the QU-BD. Maybe that is where the Chinese got the idea from, this is just so much better though. You can also get the dual setup as a pigeon pair with access from both sides. Just make sure you specify the thermistor option, otherwise it will be send out with thermocouple and you need an extra circuit to connect to your board.
Re: QU-BD MBE Extruder v9
September 22, 2013 09:14AM
DO NOT BUY THIS EXTRUDER


There are design flaws with this product that the company is aware of that make this extruded useless.

There are many examples on the web of customers who have not been able to print with this product without modifying the extruder feed mechanism or the heat shielding for the feed tube.

You will waste time and effort trying you get this to print - but in the end this is a badly designed product that is not fit for purpose.

You could ask why they don't have an example of this printing on their web site.
Re: QU-BD MBE Extruder v9
September 22, 2013 09:37AM
Funny how things work. I have this extruder and the only mod I have done so far is changed the hobbed wheel on the stepper. But I did that from the start.

I will say this though it dose not like poor quality philiment.


[mike-mack.blogspot.com]
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