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Review: Dragon Hotend  

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Jonas Borgström
(@jonas-borgstrom)
New Member
RE: Review: Dragon Hotend

I finally got around installing my Trianglelab Dragon on my mk3s+ and ended up creating my own adapter/mount so I thought I might as well share it here...

 

Since I really wanted one handed nozzle changes my first attempt was to stop the rotation by filing a 2mm deep flat spot on the bundled aluminum groove adapter and reprinting the extruder_motor_mount part with the corresponding change. This looked promising initially, but unfortunately after a few nozzle changes the threads in the aluminum adapter used by the two screws gave up and the hotend came loose. 😞 

 

So my second and final attempt was to print my own groove mount adapter that is 16 mm square in one end allowing the use of the 4 mounting holes in the "corners" of the heatsink. This design seems strong enough (I printed my parts in ASA but hopefully PETG will work as well)  but unfortunately also needs to replace the extruder_motor_plate and extruder_base extruder parts to fit.

 

Anyway, here it is if anyone is interested:

https://www.prusaprinters.org/prints/62659-mk3s-dragon-hotend-groove-mount

Posted : 06/04/2021 8:52 am
cwbullet
(@cwbullet)
Illustrious Member
Topic starter answered:
RE: Review: Dragon Hotend

@jonas-borgstrom

Nice design.  

--------------------
Chuck H
3D Printer Review Blog...
Posted : 07/04/2021 12:57 am
fuchsr
(@fuchsr)
Noble Member
RE: Review: Dragon Hotend

This weekend I finally had some downtime so I installed the Mk3S+ extruder upgrade on one of my machines and while I was at it, I also added the Phaetus Dragon. Pretty straightforward install. I may have cut the PTFE tube a bit short but so far it seems to be working fine. As Joan pointed out in an earlier post, the blue collet rings that come with the Dragon don't fit, so I just trimmed one to size. 

I used this adaptor to mount the hotend: https://www.prusaprinters.org/prints/61153

Perfect fit. And only one part that needs to be printed.

I have only tested it on a handful of short prints, so far so good. Honestly, I don't expect to see any significant difference in print quality. Main reason I bought it was the single-handed nozzle swap. I swap nozzles all the time, and while I became good at it, after a while futzing around with a wrench to hold the heat block and trying to keep the thermistor cables from breaking gets old. 

Parenthetically, I also bought the Zcatch device that is supposed to simplify nozzle swaps but couldn't get it to work properly with the Mk3S without removing the shroud. At that point I was going to do the Dragon upgrade anyway, so I didn't try hard to make it work.

Posted : 18/04/2021 12:05 am
fuchsr
(@fuchsr)
Noble Member
RE: Review: Dragon Hotend

Quick question: 

Does anyone know what nozzles the Phaetus Dragon comes with? Without much thinking I immediately swapped the built-in nozzle with my workhorse E3D V6 nickel-coated copper nozzle.

But now I'm staring at the Phaetus nozzle and am wondering... it's not brass. I checked their website but it doesn't say. It's silvery, it could be nickel-coated copper. Anything else that looks silvery seems like too expensive to be included.

Posted : 18/04/2021 12:19 am
cwbullet
(@cwbullet)
Illustrious Member
Topic starter answered:
RE: Review: Dragon Hotend

@fuchsr

Mine came with a Phaetus V6 KNockoff.  

--------------------
Chuck H
3D Printer Review Blog...
Posted : 18/04/2021 12:38 am
jmillerfo
(@jmillerfo)
Eminent Member
RE: Review: Dragon Hotend

@fuchsr

I'm not sure of the plating type but whatever it is filament does not stick to it. I have printed many spools of filament on the original nozzle and so far it does not show any wear.  Admittedly I have only printed PLA, PTEG, and TPU thus far.  Other more abrasive filaments might be a different story.

...
Posted : 18/04/2021 2:02 pm
HackMonkey
(@hackmonkey-2)
Trusted Member
RE: Review: Dragon Hotend

Pretty certain my Phaetus Dragon came with a nickel plated copper nozzle. Nickel is pretty tough, but not sure exactly how tough. 

Posted : 18/04/2021 6:41 pm
fuchsr
(@fuchsr)
Noble Member
RE: Review: Dragon Hotend
Posted by: @fuchsr

This weekend I finally had some downtime so I installed the Mk3S+ extruder upgrade on one of my machines and while I was at it, I also added the Phaetus Dragon.

Okay, a week later, the Phaetus Dragon is gone. Turns out, it was testing my patience beyond the point I was willing and able to devote time to it.

Look, I've been around the block once or twice with Live Z calibration. I could not dial this thing in. Okay, that's not an accurate description. The live-Z-my-way square actually looks perfect -- apart from some empty areas here and there where the extruder simply stopped, well, extruding. Printed the calibration square dozens of times at different temperatures, different filaments, different nozzle types and sizes. Same thing. Okay, must be a clog then, and of course there seem to be plenty of reports of clogs with the Dragon (although mostly the High Flow; I have the Standard Flow model). Again, not my first rodeo, so cold pulls, cleaning filament, new nozzles, nada. I finally take the hotend apart. Nothing to see, no clog, no extraneous filament. PTFE tube perfect. Everything pristine.

Reinstalled the stock heatbreak. The world is a perfect place again.

I'm sure, more days of futzing around with it, I could have figured out what's going on. Life is just too short. This brought back memories of the MMU2. Like the MMU, maybe one day I will find the patience and go back and tinker again (and as I know myself "maybe" probably means "definitely", I'm just a sucker for pain...). But for now I'm just happy to see this machine crank out picture perfect prints again.

And for the one-handed nozzle change, which was really the only reason I bought the Dragon in the first place? 

I actually really like the Zcatch device. Once I figured out that I had to turn it 90 degrees (duh!) it now works like a charm. My only nit is that it's not a torque wrench, which would make it perfect.

Posted : 24/04/2021 3:57 pm
KamikazeGrandma
(@kamikazegrandma)
New Member
RE: Review: Dragon Hotend

I have been using a standard flow Dragon hotend from Phaetus and I have no complaints so far. Everything works as expected and the print quality is top notch. 

Lately I have been thinking about getting a high flow dragon from TL for my corexy but found out that they have taken down the hotend (on aliexpress). I believe it is related to the intellectual property claims by slice engineering with their mosquito hotend design but I am not sure / I haven't found much online. Does anyone know more about this? I still found the dragon from phaetus on some websites (and I'll definitely get one) but I wanted to try the version from Triangle Labs to see if there was any actual difference.

Posted : 06/05/2021 6:51 pm
cwbullet
(@cwbullet)
Illustrious Member
Topic starter answered:
RE: Review: Dragon Hotend

@fuchsr

Not sure why.  It works well out of the box on my mini and MK3S.  What slicer settings are you using?

--------------------
Chuck H
3D Printer Review Blog...
Posted : 07/05/2021 2:48 am
Sterbo
(@sterbo)
Active Member
RE: Review: Dragon Hotend

I mounted the dragon hf today and the mmu fails to load, I think it gets to the point where it comes out of the ptfe and finds too much resistance ... and comes back ... I'm frustrated .... I don't know what to do ... tips? I made sure that the PTFE is in contact with the internal support

Posted : 05/06/2021 2:38 pm
fuchsr
(@fuchsr)
Noble Member
RE: Review: Dragon Hotend

@kamikazegrandma

I believe there was some action taken by the maker of the mosquito so you can't buy the assembled Dragon anymore. Having said that, Trianglelabs still offer all the components separately. I just ordered a complete set to give the Dragon another try

Posted : 05/06/2021 2:43 pm
cwbullet
(@cwbullet)
Illustrious Member
Topic starter answered:
RE: Review: Dragon Hotend

@fuchsr

Very true.  The number of options to buy this have dwindled.  I am still using my two.  I bought a third a month ago as back up.  I also have been using the Dragonfly Hotend and I am impressed.  It is more compable to the V6 or Copperhead.  I did ask about the Dragon hotend and have not gotten a reply.  It seems that all of the copies or knockoffs are disappearing.  I not sure why pressure from US manufacturer would work on a Chinese company because it is never worked before.  I am sure they did not just just grown a conscience.   

--------------------
Chuck H
3D Printer Review Blog...
Posted : 05/06/2021 3:00 pm
cwbullet
(@cwbullet)
Illustrious Member
Topic starter answered:
RE: Review: Dragon Hotend

@orange-titta

Did you chamfer your PTFE and insert it in the college all the way?  

--------------------
Chuck H
3D Printer Review Blog...
Posted : 05/06/2021 3:04 pm
fuchsr
(@fuchsr)
Noble Member
RE: Review: Dragon Hotend

At least Trianglelabs offers all the parts, and miraculously all the parts in total are pretty much the price of the assembled version...

I looked at the Dragonfly but from what I can tell it doesn't have the one-handed nozzle swap feature that attracted me to the Dragon in the first place (and which I guess is what Slice didn't like seeing copied)

Posted : 05/06/2021 3:06 pm
cwbullet
(@cwbullet)
Illustrious Member
Topic starter answered:
RE: Review: Dragon Hotend

@fuchsr

That is probably correct.  I have two Mosquitos and prefer them over the Dragon.  I bought the Dragons to test and they are a viable alternative.  The Spider and NF Crazy hotends are a copies of the Mosquito with subtle differences.  They have all pretty much dried up.  You cannot get them on Amazon or AliExpress.  

--------------------
Chuck H
3D Printer Review Blog...
Posted : 05/06/2021 3:24 pm
Sterbo
(@sterbo)
Active Member
RE: Review: Dragon Hotend
Posted by: @cwbullet

@orange-titta

Did you chamfer your PTFE and insert it in the college all the way?  

I used the PTFE stock e3d tube cut to size and I left the lower part intact…. as mentioned before, I checked inserted it all the way

This post was modified 4 months ago by Sterbo
Posted : 05/06/2021 7:31 pm
Sterbo
(@sterbo)
Active Member
RE: Review: Dragon Hotend
Posted by: @cwbullet

@orange-titta

Did you chamfer your PTFE and insert it in the college all the way?  

with petg it has fewer failures and I don't understand why

Posted : 05/06/2021 9:09 pm
Sterbo
(@sterbo)
Active Member
RE: Review: Dragon Hotend

if someone has the dragon with mmu and has problems of continuous loading and unloading filament I in single mode I found a "solution" by modifying the gcode, I pulled away the tc command that runs the initial blob but solves it for me, it could lead to others problems but x now he solved me .... if you are interested here is the gcode:

M862.3 P "[printer_model]" ; printer model check
M862.1 P[nozzle_diameter] ; nozzle diameter check
M115 U3.10.0 ; tell printer latest fw version
G90 ; use absolute coordinates
M83 ; extruder relative mode
M104 S[first_layer_temperature] ; set extruder temp
M140 S[first_layer_bed_temperature] ; set bed temp
Tx
M190 S[first_layer_bed_temperature] ; wait for bed temp
M109 S[first_layer_temperature] ; wait for extruder temp
G28 W ; home all without mesh bed level
G80 ; mesh bed leveling

;go outside print area
G1 Y-3.0 F1000.0
G1 Z0.4 F1000.0
; select extruder

; purge line
G1 X55.0 E50.0 F2000.0
G1 Z0.3 F1000.0
G92 E0.0
G1 X240.0 E50.0 F2200.0
G1 Y-2.0 F1000.0
G1 X55.0 E50 F1400.0
G1 Z0.20 F1000.0
G1 X5.0 E4.0 F1000.0

M221 S{if layer_height<0.075}100{else}95{endif}
G92 E0.0

; Don't change E values below. Excessive value can damage the printer.
{if print_settings_id=~/.*(DETAIL @MK3|QUALITY @MK3).*/}M907 E430 ; set extruder motor current{endif}
{if print_settings_id=~/.*(SPEED @MK3|DRAFT @MK3).*/}M907 E538 ; set extruder motor current{endif}

Posted : 06/06/2021 3:28 pm
bapski
(@bapski)
Trusted Member
RE: Review: Dragon Hotend

i am on the fence with this Dragon Hotend hence me subscribing.  i have tried to look-up YT for first hand reviews but i can't seem to find any direct to the point opinions whether there is a difference between this hotend and stock ones.

does anyone have any links to first-hand experience on results? comparisons?

Posted : 06/06/2021 4:23 pm
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