User Tool-Changer Tool Designs.

Discussion in 'Tool heads & ToolChanger' started by Greg Holloway, Mar 23, 2020.

  1. dc42

    dc42 Well-Known Member

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    You are right, there is a limit of 10 tracked objects. I've added this to the limits section of the object model for firmware 3.01-RC7 and I've increased to to 30 on Duet 3.
     
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  2. garethky

    garethky Well-Known Member

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    I'd like to submit mine but it needs 1 or 2 more iterations and some proper documentation.

    Printing PPE Face Shields has the down side of tying up both of my printers. The upside is having a reason to run 5Kg of filament through the tool head as fast as possible and basically test it to failure. I've worn out 2 tool heads so far and made design changes fix the durability problems. Currently torture testing #3 with the most critical idler design changes included. Give me time to run another 2 roles of filament before its golden.
     
  3. Marcus Mendenhall

    Marcus Mendenhall Active Member

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    I've run 8 rolls of filament through my Hemera doing the same thing. Running 18 hours/day, printing a frame every 90 minutes. I got lucky and got one of the Hemeras that apparently did not have cracked gearing. I'm driving it hard, and it seems to be doing fine, so far. Peaking out feeding 5 mm/s of PETG through it on the fast moves (using an 0.4 mm nozzle).
     
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  4. ryan mckenna

    ryan mckenna Member

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    Hi Greg, I am converting my Tronxy X5S to a tool changer. My first goal was mounting the tool plate and docking bracket. Do I want them perfectly level with each other when I go to dock or one slightly higher than the other. Are there any other nuances that you've figured out on anything else.
     
  5. Greg Holloway

    Greg Holloway Administrator
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    Perfectly aligned.

    Watch out for tool 'droop' where it looks like it is not aligned or too low. Its because we have to have clearance in the receiver for the docks pins and the tool slouches. The fix is to put a bump on the tool as low as possible that keeps it perpendicular when docked, on our motion system the bump rests against the electronics panel. it will make tool pick-ups and drop-offs waaay more reliable. If you have a light tool like the V6 bowden, you'll likely get away without one.
     
  6. Frostie2k

    Frostie2k Member

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    Direct drive Mosquito Tool ready for test

    min.JPG min_1.JPG min_3.JPG
     
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  7. Nibbels

    Nibbels Well-Known Member

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    Thanks to @dc42 and @Spoon Unit s help fixing my layer problem I can now focus on printing and the printer again :)

    About the threads purpose: This is my list of modifications I did.

    The TitanAero tool.
    I insert a link to more of my pictures:
    This is my 3mm/1.75mm TitanAero tool design: https://www.thingiverse.com/thing:4190989
    Within the thread: 3mm / wiring forces and toolchanger docking challenge
    large_display_Screenshot_7.jpg


    That is my top mount spool holder. I used long threaded rods and counterfixed them into the TC.
    Atop I use a 12mm tube and spool dividors which divide the carriages into their own sections. Otherwise they interact and make a mess.
    Screenshot_3.jpg
    Screenshot_8.jpg



    This is the ooze blocker: unsharpened and bent razor blades:
    3mm / wiring forces and toolchanger docking challenge
    (Which is not 100% perfect without a good wiper but works pretty good)
    Screenshot_6.jpg



    And finally the "stiffness" improvement which makes the Toolchangers frame really stiff:
    Screenshot_7.jpg
    I had to rule out any influence of insufficient stiffness because of the layer height problems I had. I dont use the original side panels so far. They are untouched and not cracked.
    The cracking-sides-thread made me think about first finishing the printer and afterwards closing it. Not the other way around.
     
  8. garethky

    garethky Well-Known Member

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  9. Nibbels

    Nibbels Well-Known Member

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    Adding this nice documentation and all the instructions makes it perfect. Thank you!!!
     
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  10. Greg Holloway

    Greg Holloway Administrator
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  11. Beat

    Beat Active Member

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  12. Jason Chodakowski

    Jason Chodakowski Active Member

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    Getting closer to reality. Mandala Rose Works is cutting this and will also stock a few in case someone needs one. Not sure when, but 'soon' (tm)
    unknown.png
     
  13. Doug Ronaghan

    Doug Ronaghan Member

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    Thank you very very much
     
  14. Nicholasav

    Nicholasav Member

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    I'm working on a pellet extruder tool to produce a fluid transfer connector. It's still early days, but the plan is to use subtractive to ream the ID for a smooth, concentric finish. The value of pellets are in using the exact resin grades used in our medical grade applications -- in this case, as representative of molded as possible, without making any type of tooling. For now, the hopper and extruder pieces were printed from PP and Nylon, respectively. The tool mounts were printed in Formlabs Tough resin. The weight does not appear to be an issue (yet), but I won't know for sure until I properly begin the commissioning process tomorrow. Everything pictured is still very much V1. Long term plans include adding another docking connector to eliminate sag, a pellet feeder with drying, and better part cooling.

    I'd appreciate any feedback!
     

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  15. Nicholasav

    Nicholasav Member

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    Small update: it functions! The weight is not yet an issue, but I have not tested it beyond 50mm/s. There is clearly work to be done, as the first test print is quite ugly.
     

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  16. tkamsker

    tkamsker New Member

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    hi i am so happy that i found this post i do have an E3D Toolchanger and i have exact same Pellet extruder which i wanted to mount on my cnc router because of weight but if you confirm that it works on e3d i would be verry happy .... and question is it possible to get the files for the mount you build ? then i save time for designing it myself thx thomas
     
  17. jeff witz

    jeff witz Member

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    We have also purchased the Mahor pellet extruder. We managed to operate it satisfactorily on an old frame. We ordered 3 new extruders from Mahor. It should be noted that flow control is very difficult with pellet extruders. We also have a Pollen printer, and we bought a direct3D machine in order to have all the existing technologies. To be clear, we are very motivated to make this technology work.
    I think that if we manage to make sure that we are always in over-extrusion, it will be quite easy to succeed in taking over geometry with the ASMBL technology. We work exclusively in OpenSource, so all the developments will be shared.

    I think, like tkamsker, that having the adaptation parts could save us a lot of time. We still have some work to finish assembling and testing the tool-changer, we will focus on moving forward with pellet extrusion as soon as we have printed our first multi-color benchy.

    I'll keep you posted on progress
     
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  18. jeff witz

    jeff witz Member

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    So, great progress so far !
    Vincent, the PhD student that works on the machine has made a great work !
    We now have a machine that works well. It is a great adventure to have a tool changer that works !
    We spend some time to adjust the build plate in order to have less than 0.20mm of deflection and orientation errors on the plate. even if there is compensation it is always better to set the plate in the best state we can have.
    Mono material impression works well, the first benchy at 60 mm/s is great, and not so bad at 120mm/s.
    We still have room for improvement for the dual printing but is start to be usable.
    That's very impressing for a research platform to be set-up so fast.
    I discuss today with Mahor Muniz from mahor.xyz and we will soon have the pellet extruders, nevertheless we already have one on another frame, I think we won't wait for the new ones !
    As there is no news from Nicholasav for the CAD files, I think we will build our own adapter plates, it's a bit unfortunate, but I hope we can work together later.

    I have bought 3 machines in order to make a local network in Lille France, I think that the fact that we have a fully working machine will help to motivate others to assemble the one I give to them !

    There are some strange things going on with Cura at the end of the printing, but for now it is more an issue of keyboard chair interface than a real software issue, I'm sure we will fix it soon.

    We will surely make a dedicated case for the tool changer mechanism as we need to be able to remove the tool manually when something goes wrong ... For now it is not an option so we don't use the case.

    I must say that in the " École Centrale de Lille" mechanics department every one that sees the change of tool, has face of a children just after receiving christmas gift, so it is very pleasing !
     
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  19. David Gilbert

    David Gilbert Member

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    Here's my idea:

    A depth scanner. A cool way to really check prints would be to have a tool that could x,y across the print and take depth samples. Might even just be a creative use of a levelling switch that is really pointy. Is the print still where you think it is, type -of-thing...
     
  20. W1EBR.Gene

    W1EBR.Gene Well-Known Member

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    #40 W1EBR.Gene, Nov 10, 2020
    Last edited: Nov 24, 2020 at 2:31 AM
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