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DXU - Efficient Dual Extrusion Upgrade for UM2+

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Posted · DXU - Efficient Dual Extrusion Upgrade for UM2+
On 3/21/2019 at 3:17 PM, Turbo-Power said:

Sanbrother sells parts for DXU on ali.

thank you !!. this is the link, perhaps faster than using an agent (still waiting for one part)

 

https://www.aliexpress.com/item/3D-Printer-Upgrade-Ultimaker-2-UM2-Extended-Newest-Olsson-Block-Nozzle-Hot-end-Kit/32988128287.html?spm=a2g0s.9042311.0.0.79084c4dR7XwgC

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Posted · DXU - Efficient Dual Extrusion Upgrade for UM2+
2 hours ago, Garufa said:

Well i had a small part to play in that..... cause they actually got me the parts from taobao 😉

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Posted · DXU - Efficient Dual Extrusion Upgrade for UM2+
2 hours ago, danielkrice said:

Is this mod still only for 1.75 filament?

I went looking for a version of the hardware for 2.85 mm filament and had trouble. I'm going to order the 1.75 mm hardware on ali and see what I can make or modify for 2.85 mm filament.

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Posted · DXU - Efficient Dual Extrusion Upgrade for UM2+

Really like the look of this design which Firmware are you using is this custom,, also what slicer I use S3D and find the Mark 2 a little awkward to use with it... VERY Good work though highly impressive.

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Posted · DXU - Efficient Dual Extrusion Upgrade for UM2+
On 4/7/2019 at 10:55 AM, danielkrice said:

Is this mod still only for 1.75 filament?

 

On 4/7/2019 at 1:19 PM, burdickjp said:

I went looking for a version of the hardware for 2.85 mm filament and had trouble. I'm going to order the 1.75 mm hardware on ali and see what I can make or modify for 2.85 mm filament.

 

 

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Posted · DXU - Efficient Dual Extrusion Upgrade for UM2+
On 4/7/2019 at 12:19 PM, burdickjp said:

I went looking for a version of the hardware for 2.85 mm filament and had trouble. I'm going to order the 1.75 mm hardware on ali and see what I can make or modify for 2.85 mm filament.

Any luck?

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Posted · DXU - Efficient Dual Extrusion Upgrade for UM2+

My 1.75 mm parts are on the way from alibaba. I'll report back when I've had a chance to investigate them.

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Posted · DXU - Efficient Dual Extrusion Upgrade for UM2+

My parts came in. They look really good!

I'll take measurements, put together some solid models, and write up a description sometime this week.

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Posted (edited) · DXU - Efficient Dual Extrusion Upgrade for UM2+
On 5/15/2019 at 9:39 AM, burdickjp said:

Here's my first blog post about the hot ends:

https://burdickjp.gitlab.io/2019/05/14/dxu-1.html

 

Verdict: I think I've found an easy way to run 2.85 mm filament.

 

 

 

When you buy on Taobao you have the option to buy PI rings so the tube is not in contact with the hot end

yyh1002 wrote:

I added a PI ring between the nozzle and PTFE tube for heat resistance, similar to the one by 3D Solex

Edited by Garufa
To quote text

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Posted · DXU - Efficient Dual Extrusion Upgrade for UM2+
On 4/8/2019 at 1:37 AM, bob-hepple said:

Really like the look of this design which Firmware are you using is this custom,, also what slicer I use S3D and find the Mark 2 a little awkward to use with it... VERY Good work though highly impressive.

Thanks. Software side it works basically the same as Mark 2, hence similar CURA and E3D profiles. 

 

On 5/15/2019 at 11:39 PM, burdickjp said:

Here's my first blog post about the hot ends:

https://burdickjp.gitlab.io/2019/05/14/dxu-1.html

 

Verdict: I think I've found an easy way to run 2.85 mm filament.

Nice post.

The 1.75 hotend runs with a custom 6.35 OD 2 ID PTFE bowden tube, sold by the same Taobao seller. The major advantage of this PTFE hotend is that there is pretty much no chance of nozzle jam or clog for PLA even with frequent long retractions. With the PI insulator ring applied, the PTFE last much longer and can also handle high temp materials. As for using E3D heatbreak, the current heatsink probably won't be able to cool it down properly because the surface area is much smaller. 

You can consider trap a piece of 6.35 OD 3.2 ID or 5 OD 3 ID PTFE tube inside the heatsink. I think the 4*3 PTFE would deteriorate pretty quick due to thin wall thickness, and it is also too soft to hold up to the compression from filament. Making 1.75 and 2.85 hotend components swappable isn't all that necessary. You would need to make compromise on both sides to achieve that. I think it would be better to make two entire printheads with 12pin connector for quick swapping. That would be much less hustle, much more reliable and cost very little. 

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Posted · DXU - Efficient Dual Extrusion Upgrade for UM2+
5 hours ago, yyh1002 said:

The 1.75 hotend runs with a custom 6.35 OD 2 ID PTFE bowden tube, sold by the same Taobao seller. The major advantage of this PTFE hotend is that there is pretty much no chance of nozzle jam or clog for PLA even with frequent long retractions. With the PI insulator ring applied, the PTFE last much longer and can also handle high temp materials.As for using E3D heatbreak, the current heatsink probably won't be able to cool it down properly because the surface area is much smaller. 

You can consider trap a piece of 6.35 OD 3.2 ID or 5 OD 3 ID PTFE tube inside the heatsink. I think the 4*3 PTFE would deteriorate pretty quick due to thin wall thickness, and it is also too soft to hold up to the compression from filament. Making 1.75 and 2.85 hotend components swappable isn't all that necessary. You would need to make compromise on both sides to achieve that. I think it would be better to make two entire printheads with 12pin connector for quick swapping. That would be much less hustle, much more reliable and cost very little. 

 

I'm not necessarily looking at being able to swap between 1.75 mm and 2.85 mm with the same hot end. I'm looking to use the same form factor for both. The same, or mechanically compatible, external dimensions.

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Posted · DXU - Efficient Dual Extrusion Upgrade for UM2+

Looking forward to a 2.85mm solution for this mod, as I simply don't like using 1.75 in a bowden setup.  Cheers and great work.

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Posted · DXU - Efficient Dual Extrusion Upgrade for UM2+
On 6/6/2019 at 6:09 PM, artistebot said:

Looking forward to a 2.85mm solution for this mod, as I simply don't like using 1.75 in a bowden setup.  Cheers and great work.

 

I am, too!

It will be a short while as I am in the middle of a move. I've got some new ideas, but they're not mutually exclusive ideas.

I intend to test the hotends in my ultimaker as it is before changing to the DXU.

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Posted · DXU - Efficient Dual Extrusion Upgrade for UM2+
On 9/22/2018 at 5:41 PM, yyh1002 said:

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

DSC08350.thumb.jpg.a9e1d69c10c74a5ca472a6f9861e081f.jpg

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

DSC08623.thumb.jpg.f2e73609b183e2e2b5663

DSC08631.thumb.jpg.7f13684f0e7cb1c1b9461

 

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.

is this upgrade also possible on the UM2?

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