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  1. #251
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    I am almost there, guys. The ptfe tube quick connect couplers came today. The titan aer comes with a stupid plastic arm that has a u shaped hole on top so I can not screw anything into it.. I tried to thread the fitting into it anyways but with no success and because the hole is at the top it would leave a large gap between the end of the coupler and the hobbed gear. Here is my all metal arm and I had to order the couplers in a 10 pack. And all I have to do now is find a m5x0.8 tap so I can put some threads in this all metal arm and I am back in business. I just have to locate this tap.

  2. #252
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    Well I had to go to my job on my day off to make it happen but I got the idler arm tapped to m5x0.8 and I got the quick connect mounted and got everything installed. From here I have to go back over a few calibrations to bring me back to where I was. This quick connect looks so much better than the hot glue..

  3. #253
    Technologist
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    Oct 2016
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    Looking good, I have the original Titan and the arm seems to be the same as on the Aero. Good to know that there's a replacement arm that can be modded to take PTFE coupler.

    Went and ordered MMU2S, been thinking about getting one for a while. Actually was going to make the order a while agoe, but Prusa shop didn't have it available at that time. Now it's in stock so should be getting one in few weeks.

    I've been doing multi-material printing for a couple of years now so is not a new thing. But MMU2S is a interesting design and I want to experience it myself. Also as I've developed a tool to for supporting single nozzle multi material printing on different slicer I want to have a hw to test the tool properly. My tool does have a MMU2S support, courtesy of a user and apparently it is working fine, but having the hw is always the fastest way to test things.

  4. #254
    Super Moderator curious aardvark's Avatar
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    pretty sure you're 90% of the way there.
    The mumu was definitely doing the right thing. Just looks like a standard normal extruder feed issue.

    And you should be able to fix that in your sleep :-)

    Hell your kids can probably do it ;-)

  5. #255
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    So I have got the latest version of Marlin up and going on all 3 of my printers. Marlin 2.0.5.3 and I also got the latest firmware installed on the MMU2S. 1.0.6. I am still not getting past the initial priming to get me to my first print. I have seen some people using a prime bucket and I think I am going to make one for this printer. It promises to save filament over building a prime tower and it definitely saves space on the build plate.

  6. #256
    Super Moderator curious aardvark's Avatar
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    what's a prime bucket ??

    Oh and here's a video for you to think about your next project. 'cos you know, once the mumu is working you'll just get bored watching it move about. ;-)
    What I really like about this machine is the three z-screws - which you can actually use for TRUE autolevelling.
    And damn it's fast !
    But his approach to building does seem very similiar to your own.


    Plus I've just worked out why a corexy can be so fast - And yes I have a particlly assembled one.
    I thought I'd done it wrong when I installed the belts because no matter how you move it - both the x & Y stepper motors move.
    But just realised that's kind of the point lol.
    The extruder carriage is always under tension and the head is always controlled, kind of like the dual motor setup you're using.

    Got to extract my s3d profiles from the registry on the old workshop computer, then I think I'll have ago at finishing the sapphire pro off.
    This has got me all intrigued now :-)

    Oh - now i remember - The bedlevelling boltss need to soldered into position as they are under the bed print surface and just turn round when you turn the bed levelling wheels. Yeah, and I don't have any soldering gear - That's why I haven't finished it yet !
    Damn.
    Have to wait for my mate the electrician to come round.
    Last edited by curious aardvark; 07-06-2020 at 06:19 AM.

  7. #257
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    I'm sorry CA, 'Purge Bucket' is an alternative to building towers and wasting bed space for filament changes. With a purge bucket the nozzle just moves to this location and extrudes X amount of filament at X speed and then goes back to printing and we can have multi material prints that take up the entire bed size. Here is my purge bucket installed in it's place.. Now I just need to create something that can follow the z axis and wipe the nozzle after the filament changes.

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