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Review: Dragon Hotend  

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cwbullet
(@cwbullet)
Illustrious Member
Topic starter answered:
Enclosure

Same here.  I have old had heat creep cause problems with PLA, but PETG does not require an enclosure so I would avoid using it.  

Posted by: @fuchsr

Even with PETG I keep the door open. 

 

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Chuck H
3D Printer Review Blog...
Posted : 13/09/2021 12:53 pm
BlueRocketMouse
(@bluerocketmouse)
New Member
Oozing

I just got the Dragon set up in my printer, but I'm having trouble with filament rapidly oozing out from between the nozzle and heat block once the hotend starts to heat up. I tried re-tightening the nozzle a few times to no avail and I'm not really sure what the problem is or what to try next. Any advice?

Posted : 20/09/2021 2:02 am
chmeredith
(@chmeredith)
Active Member
C

Sounds like you need to thread the heat break further into the heater block.

Posted : 20/09/2021 3:52 am
cwbullet
(@cwbullet)
Illustrious Member
Topic starter answered:
Leak

You have a leak.  Either the nozzle is not against the head break, you have a fault nozzle, or you have a faulty hotend.  You need to remove the silicone sock and see where the leak is coming from.  

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Chuck H
3D Printer Review Blog...
Posted : 20/09/2021 8:37 am
fuchsr
(@fuchsr)
Noble Member

As @cwbullet said, see if you can locate the leak. The Dragon hotend is NOT like the E3D V6. The heatbreak is screwed in all the way, and the nozzle should connect directly to it, if screwed in correctly and hot tightened at 285 degrees. I use a 3 Nm torque wrench. 

Posted : 20/09/2021 10:21 am
cwbullet
(@cwbullet)
Illustrious Member
Topic starter answered:
Same

I use the same type of wrench.  Any more and you will damage it.  Any less and it will not seal  

Posted by: @fuchsr

As @cwbullet said, see if you can locate the leak. The Dragon hotend is NOT like the E3D V6. The heatbreak is screwed in all the way, and the nozzle should connect directly to it, if screwed in correctly and hot tightened at 285 degrees. I use a 3 Nm torque wrench. 

 

--------------------
Chuck H
3D Printer Review Blog...
Posted : 20/09/2021 12:51 pm
BlueRocketMouse
(@bluerocketmouse)
New Member
Re: Oozing

The leak is coming from the top of the nozzle (where it meets the heat block). I'll try to find a 3 Nm torque wrench. Really hoping I didn't break it already...I didn't realize overtightening could be an issue so I've been using my full force on it.

Thanks all for the help.

Posted : 20/09/2021 2:08 pm
JoanTabb
(@joantabb)
Moderator

did you change the nozzle? 
mk8 nozzles have a short thread on them, which does not seal against the heatbreak

regards Joan

I try to make safe suggestions,You should understand the context and ensure you are happy that they are safe before attempting to apply my suggestions, what you do, is YOUR responsibility. Location Halifax UK...
Posted : 20/09/2021 4:23 pm
cwbullet
(@cwbullet)
Illustrious Member
Topic starter answered:
M8 vs V6

That would do it.  It is hard to identify the nozzle on the appearance.  Can you show an image of the nozzle?  I can usually tell.  

 

 

--------------------
Chuck H
3D Printer Review Blog...
Posted : 20/09/2021 4:36 pm
BlueRocketMouse
(@bluerocketmouse)
New Member
MK8

Oh wow, I think you're right! I don't have the nozzle on hand to take a photo but I'm looking at the product page I bought it from and it does indeed say MK8. I'll have to try a different nozzle when I get home. Thank you, Joan!

Posted : 20/09/2021 4:56 pm
JoanTabb
(@joantabb)
Moderator

I think the mk8 screw thread is 6mm long, and the e3Dv6 nozzle id 7.5mm thread length

regards Joan

I try to make safe suggestions,You should understand the context and ensure you are happy that they are safe before attempting to apply my suggestions, what you do, is YOUR responsibility. Location Halifax UK...
Posted : 20/09/2021 5:23 pm
Xanthe
(@xanthe)
Trusted Member
Mk8 or V6?

Are you sure it's a Mk8 type nozzle?

Mine (bought about 1 month ago) looks very much like a V6 type nozzle.

Posted : 21/09/2021 9:53 am
cwbullet
(@cwbullet)
Illustrious Member
Topic starter answered:
Nozzle

That is a good question.  NIt is important to note that not all dragons come with a nozzle.  

Posted by: @xanthe

Are you sure it's a Mk8 type nozzle?

Mine (bought about 1 month ago) looks very much like a V6 type nozzle.

 

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Chuck H
3D Printer Review Blog...
Posted : 21/09/2021 9:56 am
fuchsr
(@fuchsr)
Noble Member

No idea why Mk8 even came up, the Dragon uses standard E3D V6 nozzles.

Posted : 21/09/2021 11:21 am
cwbullet
(@cwbullet)
Illustrious Member
Topic starter answered:
Leak

I can explain that - it is simple.  Not every Dragon includes a nozzle and the OP has a leak.  Wrong nozzle size is one possible cause of a leak.  I hope that helps and clarifies what was posted above.  

Posted by: @fuchsr

No idea why Mk8 even came up, the Dragon uses standard E3D V6 nozzles.

 

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Chuck H
3D Printer Review Blog...
Posted : 21/09/2021 12:38 pm
fuchsr
(@fuchsr)
Noble Member

Got it, now I know where you were coming from—in case OP accidentally bought the wrong nozzle type.

Posted : 21/09/2021 12:51 pm
cwbullet
(@cwbullet)
Illustrious Member
Topic starter answered:
Replace

Or even replaced it.  Stranger things have happened.  

Posted by: @fuchsr

Got it, now I know where you were coming from—in case OP accidentally bought the wrong nozzle type.

 

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Chuck H
3D Printer Review Blog...
Posted : 21/09/2021 12:52 pm
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