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Review: Dragon Hotend  

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kieran.a3
(@kieran-a3)
New Member
RE: Review: Dragon Hotend

@martin-d17

Hello, would you be able to let me know about your experience also? 

 

Thanks 

Posted : 14/05/2020 9:31 am
bobstro
(@bobstro)
Illustrious Member
RE: Review: Dragon Hotend
Posted by: @charles-h13

I could not figure out the flow rate.  I will tell you it is better than the V6.  

Here's the procedure I use

My notes and disclaimers on 3D printing

and miscellaneous other tech projects
He is intelligent, but not experienced. His pattern indicates two dimensional thinking. -- Spock in Star Trek: The Wrath of Khan

Posted : 14/05/2020 1:32 pm
cwbullet
(@cwbullet)
Topic starter answered:
RE: Review: Dragon Hotend

@bobstro

Thank you.  

--------------------
Chuck H
3D Printer Review Blog

Posted : 14/05/2020 2:26 pm
thorsten.eggert
(@thorsten-eggert)
New Member
RE: Review: Dragon HotendI

Hi,

I purchased a high flow dragon and have a big problem. When I tried to print it got really hot. The v6 fan shroud I used started to meld and I burned my self on the black radiator. It got clogged after extruding a few mm of filament, probably the heatbreake is filled with molten filament.

I bought it because I prefer the design over the of the mosquito, and I think its quite possible I made a mistake. But has anyone an idea what possibly went wrong? 

I used the heater cartridge and  heater element in an other hotend later, so I'm quite sure the temp readings are correct.

I'm thinking about buying  a replacement one  but thats quite pointless unless I know what went wrong.

Greetings from Hamburg

Thorsten

Posted : 18/05/2020 8:16 pm
MartinD
(@martind)
Trusted Member
RE: Review: Dragon Hotend

do you have laser thermometer? Please try to print eg Prusa logo and check the temperature during print, of the filament cooler (heatbreak) and the rest

 

Posted : 18/05/2020 8:33 pm
bobstro
(@bobstro)
Illustrious Member
RE: Review: Dragon Hotend
Posted by: @thorsten-eggert

[...] I bought it because I prefer the design over the of the mosquito, and I think its quite possible I made a mistake. But has anyone an idea what possibly went wrong? 

Are you sure you purchased a 24V heater cartridge? Can't say that I've tried it, but I'd expect a 12V heater cartridge to get quite hot when supplied with 24V. Also verify the thermistor is correct.

 

My notes and disclaimers on 3D printing

and miscellaneous other tech projects
He is intelligent, but not experienced. His pattern indicates two dimensional thinking. -- Spock in Star Trek: The Wrath of Khan

Posted : 18/05/2020 8:34 pm
thorsten.eggert
(@thorsten-eggert)
New Member
RE: Review: Dragon Hotend

I can't print with the dragon, since the heatbreake is melted stuck.My heater works on 12v and I measured the resistance of the heater since I got wrong parts delivered, it seemed right.

And the same heater and thermistor are working right in a v6, so I think the measurements are at least roughly right . With my v6 I have issues on longer prints thats why I wanted to switch to the dragon.

Its difficult to measure the temperature with an contact less IR thermometer, because the surface of the heater block is small and shiny, but I think it should be not far off. I checked the push thru resistance of the filament and it got squishable at the expected temperature for PETG.

I probably need a replacement heatbreake or get it cleaned before I can try printing again, but I would like to know what went wrong before.

Perhaps the high flow version was not a good idea? 

Posted : 18/05/2020 9:12 pm
Jiheffe
(@jiheffe)
Eminent Member
RE: Review: Dragon Hotend

Hi,

Just got mine in the mail today. If I got you right, only thing you needed to do was to cut a PFTE to the right length, right? About 2-3mm?
What end would you suggest to trim? Never did that before 🙂 !

Posted : 26/06/2020 2:11 pm
Crawlerin
(@crawlerin)
Prominent Member
RE: Review: Dragon Hotend

Thanks for review Charles, I read about this hotend here and there but there are not that many people having or to be more precise sharing experience with it. 

Do you know how it would behave with Bowden system? Is it even possible to mount Bowden tube there? It may be an overkill for MINI especially price-wise, but other printers like Ender could be interesting.

Posted : 26/06/2020 6:06 pm
cwbullet
(@cwbullet)
Topic starter answered:
RE: Review: Dragon Hotend

I will post more info tonight.  I also have 6 more hotend to test.    I really wish there was a means to make the entire extruder swappable.  I need an easier way to trade them out.  

--------------------
Chuck H
3D Printer Review Blog

Posted : 26/06/2020 6:22 pm
Yveske
(@yveske)
Estimable Member
RE: Review: Dragon Hotend

@martin-d17

I would be interested in your results also, especially with regards to (Ninja)Flex

Thanks,
Yveske

Having problems with bed adhesion every morning...

Posted : 26/06/2020 6:51 pm
Jiheffe
(@jiheffe)
Eminent Member
RE: Review: Dragon Hotend

Just installed it this evening. As it was not delivered with a PTFE tube I trimmed  a spare one. The tube needs to be about 1 cm shorter than with the E3D hotend.

Just ran a firmware Z calibration which looked OK, then did a small PETG print, perfect 🙂 !

Will do more next days. But what I like most already is the build which imho makes filament leaks at the heatbreak-nozzle interface much less likely to happen.

This post was modified 2 years ago 2 times by Jiheffe
Posted : 26/06/2020 8:41 pm
cwbullet
(@cwbullet)
Topic starter answered:
RE: Review: Dragon Hotend

I just looked at my notes and I trimmed off 9mm so that is pretty close to what you did.  

--------------------
Chuck H
3D Printer Review Blog

Posted : 26/06/2020 8:55 pm
Jiheffe liked
cwbullet
(@cwbullet)
Topic starter answered:
RE: Review: Dragon Hotend

I just looked at prices and found it with a nozzle set for much less: Dragon for $53.88

--------------------
Chuck H
3D Printer Review Blog

Posted : 26/06/2020 8:57 pm
Crawlerin
(@crawlerin)
Prominent Member
RE: Review: Dragon Hotend

There's already a Chinese clone of an original Chinese hotend? 🙂 

Posted : 26/06/2020 9:13 pm
cwbullet
(@cwbullet)
Topic starter answered:
RE: Review: Dragon Hotend

@crawlerin

Several of them.  They clone themselves.  

--------------------
Chuck H
3D Printer Review Blog

Posted : 26/06/2020 10:54 pm
cwbullet
(@cwbullet)
Topic starter answered:
RE: Review: Dragon Hotend

Dragon Hotend Review

Amazon:

  1. Dragon Standard Flow
  2. Dragon High Flow

I wanted to reply to my original email and post another link to purchase them.

You can also purchase the https://s.click.aliexpress.com/e/_dVC9lr Y" target="true">Dragon Hotend through AliExpress.  I just ordered a backup.  

--------------------
Chuck H
3D Printer Review Blog

Posted : 07/08/2020 4:17 pm
Jiheffe
(@jiheffe)
Eminent Member
RE: Review: Dragon Hotend

I have one since a couple of weeks and one of the major advantages over the stock E3D hotend is that it is very easy to make sure the nozzle and heatbreak are secured butt-to-butt. Didn't have a single heat creep issue since then. For this I can only recommendend it.

However, I recently had an issue which I eventually traced back to the assembly coming loose due to some screws that had become loose... Seems this happened to at least one other person.

So just a word of caution... Be sure to check those two little screws...

Posted : 07/08/2020 4:30 pm
cwbullet
(@cwbullet)
Topic starter answered:
RE: Review: Dragon Hotend

@jiheffe

Ok.  Not has that problem btu then again, I tightened all my screws and used a little thread lock.  

--------------------
Chuck H
3D Printer Review Blog

Posted : 07/08/2020 4:44 pm
Jiheffe liked
Jiheffe
(@jiheffe)
Eminent Member
RE: Review: Dragon Hotend

@charles-h13

Hi,

Yes, don't misunderstand me, I really am happy with this hotend !

BTW, what are you using as a thread lock? I'm new to this 🙂

Posted : 07/08/2020 5:12 pm
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