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A different multi-extrusion approach - UM tool / printhead changer


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Posted (edited) · A different multi-extrusion approach - UM tool / printhead changer

currently assembling the second extruder, meanwhile it passed the first endurance test. not bad for a small 70 gr pancake stepper ...

 

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Posted · A different multi-extrusion approach - UM tool / printhead changer

currently assembling the second extruder, meanwhile it passed the first endurance test. not bad for a small 70 gr pancake stepper ...

 

 

That's 3D porn :D

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Posted · A different multi-extrusion approach - UM tool / printhead changer

`Where did you get the gears for? Is there some place where you can get theme, or are they handmade?

Because i maby want to use one of the hot ends with one of your extruders. one just bowden and one direct driver. The bowden for PLA and other and the direct drive for flexible material.

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    Posted (edited) · A different multi-extrusion approach - UM tool / printhead changer

    Handmade so far.

    mk8-gear.thumb.jpg.2933f982172030c86a2f1ea6f05d7fe2.jpg

    But I think about having them manufactured if there is enough interest.

     

    Oke really cool, did you make it something like this?

    add 4 minutes he start cutting

     

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    Posted (edited) · A different multi-extrusion approach - UM tool / printhead changer

    flap, flap, flap ...

    I had some concerns as it's not really working symmetrically, but it looks ok.

     

    Well maybe it look strangely but it is really a good idea. i like it:P

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    Posted (edited) · A different multi-extrusion approach - UM tool / printhead changer

    working on the e3d mount:

    hwDiNfF.jpg

    Ohh and foensturm, do you have some stp files of the extruder, so i can start making the one drirect drive extruder mount for the right hot end?!

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    Posted · A different multi-extrusion approach - UM tool / printhead changer

    I would be interested. I just got my Nema 8 extruder up and running. You can find the details in your direct drive extruder thread.

    Right now my gear box is substantially heavier, primarily due to the much larger worm gear.

    Looks like you also moved to 5 mm rod for the gear box axle.

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    Posted · A different multi-extrusion approach - UM tool / printhead changer

    ... some progress. Learned how to print reliable with PLA HT and finished the first dock.

    pancake-extr2-pla-ht.thumb.jpg.5068b96120e52c17e42815d9809aaf09.jpg

    corexy-dock.thumb.jpg.9d78668f764edd2008d80628d39bf4dd.jpg

     

    How does the pancake stepper compare to the Nema 8 motor?

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    Posted · A different multi-extrusion approach - UM tool / printhead changer

    Well, same weight, almost three times the torque and twice as hot (just kidding, but it can get really hot). Besides this it's comparing apples with oranges: 3 mm vs 1.75 mm, 1:40 vs 13:60 gear, Merlin hotend vs. E3D Lite (which E3d says is not that fast). I still have to conduct some extrusion speed tests.

    And yes I moved to 5mm, which makes things a little easier.

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    Posted · A different multi-extrusion approach - UM tool / printhead changer

    One thing I didn't expect with the Nema 8 design is that it is way quieter than the UMO stock extruder. I am guessing that is due to the increase in step frequency and decoupling from the wooden frame.

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    Posted · A different multi-extrusion approach - UM tool / printhead changer

    True, I like that very much. Almost silent, just a gentle "beep" on retractions. It's the same with the pancake stepper and the 13:60 gear.

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    Posted · A different multi-extrusion approach - UM tool / printhead changer

    True, I like that very much. Almost silent, just a gentle "beep" on retractions. It's the same with the pancake stepper and the 13:60 gear.

     

    Well then I need to take a look at mine extruder it is the loudest part of al?! But do you have some stp file of the extruder for me? So I can edit them for my E3D mount.

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    Posted · A different multi-extrusion approach - UM tool / printhead changer

     

    @foehnsturm is the motor that you use the Sanyo Denki SS2421-5041? If so, do you know how the wire colors of it map to the colors/pin out of the UM2 default feeder motors?

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    Posted · A different multi-extrusion approach - UM tool / printhead changer

    A: Yes

    B: I used red->red, yellow->blue, orange->black, blue->green to mimic the UMO pattern.

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    Posted · A different multi-extrusion approach - UM tool / printhead changer

     

    True, I like that very much. Almost silent, just a gentle "beep" on retractions. It's the same with the pancake stepper and the 13:60 gear.

     

    Well then I need to take a look at mine extruder it is the loudest part of al?! But do you have some stp file of the extruder for me? So I can edit them for my E3D mount.

     

    Working on rev3 at the moment which might fit better for your mount (less height). It moves the heavy parts (E3D, stepper) closer to the mounting point.

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    Posted · A different multi-extrusion approach - UM tool / printhead changer

    Thanks!

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    Posted (edited) · A different multi-extrusion approach - UM tool / printhead changer

    rev3, trading 15 mn of height for 10 mm width

    pancake-extr3-1.thumb.jpg.2a9f5d00409b1f4da9dc0e6650324fb1.jpg

    pancake-extr3-2.thumb.jpg.0e92474dbb55992d322b37eefa7148f2.jpg

    pancake-extr3-3.thumb.jpg.5214fb21a714b6a773b3b09e26c98a94.jpg

    pancake-extr3-4.thumb.jpg.bf2eb25b9ff6dc02efb7be2d07ce41aa.jpg

    ... and look at the wiring! ...

    pancake-extr3-1.thumb.jpg.2a9f5d00409b1f4da9dc0e6650324fb1.jpg

    pancake-extr3-2.thumb.jpg.0e92474dbb55992d322b37eefa7148f2.jpg

    pancake-extr3-3.thumb.jpg.5214fb21a714b6a773b3b09e26c98a94.jpg

    pancake-extr3-4.thumb.jpg.bf2eb25b9ff6dc02efb7be2d07ce41aa.jpg

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    Posted (edited) · A different multi-extrusion approach - UM tool / printhead changer

    rev3, trading 15 mn of height for 10 mm width

     

    I really like the design,:)

    But i only miss a extra fan for cooling for the print

    Where can i get al the part and the stl files, i really need two for my new printer:D

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    Posted · A different multi-extrusion approach - UM tool / printhead changer

    ... and look at the wiring! ...

     

    :) looking neat now..

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    Posted · A different multi-extrusion approach - UM tool / printhead changer

    rev3, trading 15 mn of height for 10 mm width

     

    looking beautiful !!
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