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yyh1002

DXU - Another Dual Extrusion Upgrade for UM2+

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Hey guys,

 

I would like to share a lever action dual extrusion solution I came up with for Ultimaker 2+.

The approach is based on the great effort everyone put into Mark2 and Ultimaker 3. 

The print head holds two hot ends, which are originally to be installed on standard UM2 head for 1.75 filament. The right nozzle move up and down for nozzle swapping. 

This compact dual print head can achieve single extrusion print area of 220x223x205, and dual extrusion print area of 202x223x200.

 

DSC08349.thumb.jpg.1891fb711f1d9255a4a239ee340d14e0.jpg

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IMG_3484.MOV_20180923_015524_315.thumb.jpg.85ff785990b9447b985c1b35cb9e49c4.jpg

 

Video clips:

 

Files and instructions available at:

https://github.com/yyh1002/DXU

 

Credits:

Lever lifting mechanism is inspired by Ultimaker 3.

The firmware is modified based on Mark2 version of Tinkergnome firmware by @tinkergnome.

CURA profiles are modified based on the Mark2 profiles by @tinkergnome and @foehnsturm. Used Mark2Tweaks plugin for CURA by Krys Lawrence.

Edited by yyh1002
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I just looked at some of the design files for this - really good work.  Quite impressive.  Instructions for the feeder are fantastic.  There are some clever innovations in this.  I love that you included a bom with links to where to get the parts.  This just seems very thorough.

 

I see also that you included the firmware both compiled and git source code (so one can see the changes you had to make).

 

Very impressive.

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10 hours ago, urtxiki said:

Hi, congratulations for your work. I am very interested in this update but 2 problems arise,
I can not load the .hex file from the priest, could you confirm that this is correct?
Where can I acquire the aluminum pieces that are seen in the presentation?
a cordial greeting

Thanks. The .hex file is correct. Are you using Cura 3.4 to upload it? For some reason Cura 3.4 cannot upload custom firmware successfully. Earlier versions such as 3.1 works. I'm not sure which aluminum pieces your are referring to. You can find all the links in BOM. 

 

10 hours ago, gr5 said:

I just looked at some of the design files for this - really good work.  Quite impressive.  Instructions for the feeder are fantastic.  There are some clever innovations in this.  I love that you included a bom with links to where to get the parts.  This just seems very thorough.

  

I see also that you included the firmware both compiled and git source code (so one can see the changes you had to make).

 

Very impressive.

Thanks for the kind words 🙂

 

5 hours ago, ultiarjan said:

I assume it's not possible to change nozzles in this design without taking apart the head?

There is no need to remove the head or hotend to change nozzle. It takes a plier to hold the heater block to unscrew and install the nozzle with hex socket wrench.

 

5 hours ago, ultiarjan said:

Did you print the lever parts? what material did you use? 

I printed everything with unmodified PC at 280 °C with the same hotend. I added a PI ring between the nozzle and PTFE tube for heat resistance, similar to the one by 3D Solex. The lever parts were printed at 0.05 layer height. 

Edited by yyh1002

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On 9/26/2018 at 10:44 PM, DidierKlein said:

Nice work! How does this 1.75mm special hotend print? Is it working well? I like the standard um2+ hotend (and the UM3 Core), would be nice if it was adaptable to these

It's flawless. I printed high temp, flexible, and standard filament and haven't had any problem. Plus the consumable is only a piece of 2x4 PTFE tube which makes maintenance pretty much free.

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