1 Topic by harleydk

  • harleydk
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Topic: Replacement nozzle and brass barrel

Hello there,

printed a bit with my new solidoodle 2, but quickly ended up with two clogged hot ends... That's what I get for leaving the filament in there overnight-  DOH!! Big post-it note on the lid now has me never doing _that_ again. Will undoubtedly have fun trying to clear those clogs out.

Anyways,

does anyone know of alternative supplies for the brass nozzle and brass barrel? Preferably European, but I'll take it just the same... I'd like to have some spares lying around for a quick replacement.

Thanks a million in advance,

Morten,
Denmark

2 Reply by Tomek

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Re: Replacement nozzle and brass barrel

I believe Ultimaker is based in Europe? they're a more high end of the low-cost printer makers, but they're also quite innovative.



I just bought a new nozzle from Qu-bd.com. Not too much to report, except it was cheap and some people say it's not the best, but I chose the cheaper qu-bd nozzle so that I could afford eventually to upgrade to the all-stainless-steel PRUSA nozzle that's in development.  Also, the support was very friendly when I told them they forgot the two resistors in my package, they immediately refunded me the $2, offered their apologizes, and even some credit for my trouble.

3 Reply by jon_bondy

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Re: Replacement nozzle and brass barrel

harleydk wrote:

That's what I get for leaving the filament in there overnight-  DOH!! Big post-it note on the lid now has me never doing _that_ again.

I leave filament in my printers all of the time, without a problem.  Of course, the hot ends are not heated except when I am printing.

4 Reply by devilman2075

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Re: Replacement nozzle and brass barrel

Don't be afraid to leave filament in the extruder.  That won't cause clogs, but keeping the extruder at operating temperatures for long periods without any extruder activity will cause clogs. Considering it takes a few minutes to get to full temp, there's really no reason to do so

5 Reply by harleydk

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Re: Replacement nozzle and brass barrel

devilman2075 wrote:

Don't be afraid to leave filament in the extruder.  That won't cause clogs, but keeping the extruder at operating temperatures for long periods without any extruder activity will cause clogs. Considering it takes a few minutes to get to full temp, there's really no reason to do so

Hello devil, and to Jon as well,

thanks for that input - I was not aware of that, being a novice with 3d printing I assumed the plastic would always be able to melt at 200 degrees, no matter how long the extruder was heated sans activity. So good info there, thanks again.

6 Reply by devilman2075

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Re: Replacement nozzle and brass barrel

Yea you should have no issues, the one thing id wish they'd maybe add a sticker to the machine itself that says warning do not leave extruder at operating temperature without printing.  That's an easy mistake to make as a new owner,  but leaving filament in the extruder say overnight or all week without use of the machine will not cause issues.

The problem arises when at operating temps its still melting the plastic in the nozzle, with the machine idle and not extruding, that plastic isn't going anywhere but building up in the hot end eventually leading to clogs. Also id check into the black filament issue thread and get an idea of the problems with that.

7 Reply by harleydk

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Re: Replacement nozzle and brass barrel

devilman2075 wrote:

Yea you should have no issues, the one thing id wish they'd maybe add a sticker to the machine itself that says warning do not leave extruder at operating temperature without printing.

Yea, you're right, I added the sticker myself. Thanks for the explanation,

I managed to clean the clog (picture) :-)

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8 Reply by devilman2075

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Re: Replacement nozzle and brass barrel

Glad your up and working.  Id definetly consider getting a spare hotend to keep around.

9 Reply by chuey

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Re: Replacement nozzle and brass barrel

I'm wondering if I have the same problem you do.

I had a clog on my first hot end (I thnk). The extruder gear would basically start digging a hole in the filament and nothing would come out. This would happen shortly into a print. I bought another hot end and now it is starting to do the same thing.

I normally would run at 190 degrees. I had to set the filament multiplier to 0.7 and all the speeds down to 30 (Slic3r) just to get the prints to work at all.

I noticed a guy on Youtube who pushed 100 mm of filament though his extruder at a much higher speed than I ever could.

I am wondering if any of you guys may have had to re-calibrate the temperature on the hot-end?

It seems like it extrudes much better when set to 200 but eventually the temperature control freaks out and will shut it off because it got hotter than 215.

10 Reply by harleydk

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Re: Replacement nozzle and brass barrel

Hi Chuey,

the symptoms you describe could be mine.

Soon as I got my hot end working it immediately clogged up at the temperatures you describe. I haven't had my temperature control freak out, though.

Are you by any chance using black filament?

Am taking a step back from my Solidoodle until a) they come up with a better hot-end solution or b) I get the kind of time to design a hot-end which works for me - i.e. is very easily replaceable when it clogs.