Review: Dragon Hotend  

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charles.h13
(@charles-h13)
Famed Member

The Dragon Hotend is relatively new to the market.  Trianglelab has released this new product in January.   This product appears to take features from both the E3D V6 and Mosquito Hotend and integrates them into a small and effective package.  I have been using the standard model for several weeks on my MK3S and I am impressed.  

The Dragon Hotend is a drop-in replacement for the E3D V6.  The upgrade process was extremely easy.  The only adjustment I had to do was redo the first layer calibration.  The structure of the Dragon has increased structural rigidity and improved thermal performance.  

The Dragon Hotend also takes some novel features from the Mosquito Hotend design.  It uses 4 stainless steel tubes to connect the heat block to the heatsink.  The thermal transfer is lowered and, like the Mosquito, one-handed nozzle changes are now a possibility.   The rounded mount can allow the Hotend to spin, I added a small piece of high-temperature electrical tape to prevent this.   The best part is that it seems to jam less the e3d V6.  

There is a high flow and standard flow version.  Reportedly, the high flow is similar to the Volcano but with the same footprint as the V6.  I cannot confirm this because I own the standard.  

The bottom line:  The Dragon Hotend is a pretty good product.  I have been using it for 2 months and I would recommend it.  The all-metal construction of the heat break creates good thermal performance while maintaining V6 compatibility. The Dragon is one of the best Hotends I own. It is not cheap by it worth every penny. 

Amazon:

  1. Dragon Standard Flow
  2. Dragon High Flow

 

 

Posted : 12/04/2020 10:33 pm
charles.h13
(@charles-h13)
Famed Member

Any questions or requests for testing?  

Posted : 14/04/2020 5:17 pm
chmeredith
(@chmeredith)
New Member

Thanks for posting this as I've been considering this hotend. I do have a couple questions:

  1. How far down does the PTFE tubing go? 
  2. Have you used this hotend with the MMU2? I'm very interested in a hotend that will facilitate reliable filament changes with consistent, non-stringy, well-shaped tips. I'm hoping that the Dragon's smaller thermal zones will help with this and am interested in your experiences.
Posted : 14/04/2020 6:21 pm
joan.t
(@joantabb)
Veteran Member Moderator

@chmeredith

I expect the standard Dragon would be best with the MMU2,  as the high flow Dragon, has a longer melt zone... 

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 : 14/04/2020 6:32 pm
charles.h13
(@charles-h13)
Famed Member

@joantabb

You might be right.  

Posted : 14/04/2020 9:26 pm
charles.h13
(@charles-h13)
Famed Member

@chmeredith

1.  I would have to check but I think it was 20-22mm.

2.  I have tried it with an MMU2.  

Posted : 14/04/2020 9:28 pm
chmeredith
(@chmeredith)
New Member

@charles-h13, thanks!

  1. Can you tell if the PTFE tube goes into a chamfered counterbore in the heatbreak? Or does it butt up against a flat mating surface?
  2. Did you notice any performance differences with the MMU2?
Posted : 14/04/2020 9:39 pm
charles.h13
(@charles-h13)
Famed Member

@chmeredith

Sorry, that was a typo.  

1.  The PTFE tube buttes up against the heat break.  

2.  I do not own an MMU2 and have not use it with one.  

Posted : 15/04/2020 12:55 am
bob.h9
(@bob-h9)
Estimable Member

What is involved with putting it into an Mk3?

Fan mounts? Firmware changes? PS changes? PTFE measuring or cutting?

Are there any instructions?

Mk3 - 1X
Mk3S - 2X
2011 Toyota Sienna XLE
Wife - 1X...
Posted : 16/04/2020 12:19 pm
charles.h13
(@charles-h13)
Famed Member

@bob-h9

The thing has the same measurements as the V6.  I have not found any instructions.  I have found that except for a shorter piece of PTFE tubing that this is drop-in.  I eyeballed it and cut 2-3 mm off of the piece I was using with my MK3s.  No changes to a single file and I used the stock printed parts.  As far as the PTFE length, I think it was 20-22mm long.  

No change to the fans.  

Posted : 16/04/2020 1:57 pm
martin.d17
(@martin-d17)
Trusted Member

I am in for testing, own the MMU2S and made some models hard to print (using all 5 filaments). tried to use Mosquito Magnum before on that, but had some issues I hope experiences with Dragon would be much better.  Sent you PM.

Posted : 17/04/2020 7:14 am
cedric.m
(@cedric-m)
Honorable Member
manelto
(@manelto)
Estimable Member
Posted by: @charles-h13

@bob-h9

...  As far as the PTFE length, I think it was 20-22mm long.  

No change to the fans.  

So, the ptfe length is now 44,3+20mm/22mm = 64,3mm / 66,3mm?

Do you need make a new printing parts for the extruder?

Sorry for my poor English. I try to do my best....
Posted : 24/04/2020 6:56 pm
charles.h13
(@charles-h13)
Famed Member

@manelto

I used standard parts from my E3D V6 print head.  

Posted : 24/04/2020 7:40 pm
vintagepc
(@vintagepc)
Noble Member

Volumetric flow rates? The amazon page touts high numbers but they also claim a 40mm^3/sec for a standard E3d v6 which we know is actually closer to 11.5.  So what are your results, and are they also 4x less than they claim?

Posted : 24/04/2020 7:45 pm
charles.h13
(@charles-h13)
Famed Member

@vintagepc

I will try to get you numbers tonight.  

Posted : 24/04/2020 8:35 pm
bobstro
(@bobstro)
Illustrious Member
Posted by: @vintagepc

Volumetric flow rates? The amazon page touts high numbers but they also claim a 40mm^3/sec for a standard E3d v6 which we know is actually closer to 11.5.  So what are your results, and are they also 4x less than they claim?

Unfortunately, we're unlikely to get anybody to use a consistent set of criterial. For pushing PLA through a 0.4mm nozzle, the 11.5 rate is a safe recommendation. 15 is a wee bit high for the E3D V6 with PLA and a 0.4mm nozzle.

Much to my surprise though, if you move to PETG or a larger nozzle, much higher rates are possible. The back-pressure of smaller nozzles really limits throughput and PLA seems to resist higher speeds. I've done some testing and was very surprised. Check out the PDF of raw data there. For doing the COVID response printing, I decided to quit worrying about finish and go for all-out throughput. With an E3D V6 hotend with a 0.6mm nozzle printing PETG at 250C, I was able to get above 45mm^3/s.

Slapping on a 3D Solex 0.6mm Matchless was above 70, so their "speed doubler" is legit, at least with 0.4 and 0.6mm nozzles. I couldn't push filament fast enough to make the extruder click or seize at 70mm^3/s with an E3D V6. For some reason, 0.8mm was closer to conventional nozzles.

I'd like to test a Dragon at some point, but it does seem the E3D V6 can handle the speeds the Mk3 can use with the right nozzle and filament combinations. I don't think a Dragon will help much unless you're pushing a lot through really large (>0.8mm) nozzles, but printer limitations are part of that. I'd definitely not bother with a hi-cap Dragon for everyday printing.

I'm going to be more specific about filament and nozzle size when discussing MVS going forward.

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 : 24/04/2020 8:44 pm
charles.h13
(@charles-h13)
Famed Member
Posted by: @bobstro
Posted by: @vintagepc

Volumetric flow rates? The amazon page touts high numbers but they also claim a 40mm^3/sec for a standard E3d v6 which we know is actually closer to 11.5.  So what are your results, and are they also 4x less than they claim?

Unfortunately, we're unlikely to get anybody to use a consistent set of criterial. For pushing PLA through a 0.4mm nozzle, the 11.5 rate is a safe recommendation. 15 is a wee bit high for the E3D V6 with PLA and a 0.4mm nozzle.

Much to my surprise though, if you move to PETG or a larger nozzle, much higher rates are possible. The back-pressure of smaller nozzles really limits throughput and PLA seems to resist higher speeds. I've done some testing and was very surprised. Check out the PDF of raw data there. For doing the COVID response printing, I decided to quit worrying about finish and go for all-out throughput. With an E3D V6 hotend with a 0.6mm nozzle printing PETG at 250C, I was able to get above 45mm^3/s.

Slapping on a 3D Solex 0.6mm Matchless was above 70, so their "speed doubler" is legit, at least with 0.4 and 0.6mm nozzles. I couldn't push filament fast enough to make the extruder click or seize at 70mm^3/s with an E3D V6. For some reason, 0.8mm was closer to conventional nozzles.

I'd like to test a Dragon at some point, but it does seem the E3D V6 can handle the speeds the Mk3 can use with the right nozzle and filament combinations. I don't think a Dragon will help much unless you're pushing a lot through really large (>0.8mm) nozzles, but printer limitations are part of that. I'd definitely not bother with a hi-cap Dragon for everyday printing.

I'm going to be more specific about filament and nozzle size when discussing MVS going forward.

Good points.  

Posted : 25/04/2020 2:44 am
charles.h13
(@charles-h13)
Famed Member

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

Posted : 29/04/2020 12:25 am
kieran.a3
(@kieran-a3)
New Member

@martin-d17

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

 

Thanks 

Posted : 14/05/2020 10:30 am
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