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OpenBuilds ACRO Z Axis

Discussion in 'Laser Cutters' started by petethepig, May 31, 2019.

  1. petethepig

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    petethepig published a new build:

    Read more about this build...
     
  2. Scotty Orr

    Scotty Orr Journeyman
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    This is cool! I hope you can publish a few more photos (close-ups). Thanks!
     
  3. Mark Carew

    Mark Carew OpenBuilds Team
    Staff Member Moderator Project Maker Builder Resident Builder

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    Ditto @petethepig looking forward to seeing more pics as well! Nice job
     
  4. yogeshnd

    yogeshnd New
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    This is really awesome! I was just thinking of building the acro system, but was refraining as it doesn't have a Z axis.

    I'll be primarily using it to cut paper/cardboard with laser or a plotter cutting blade.

    Just curious, Do you think it can mill murals like these?? just works of art on foam or light wood maybe?

    Looking forward for updates!! Great job!
     
  5. petethepig

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    Hi @yogeshnd. I don't think it will be able to do murals like that unfortunately. In foam — sure, but I don't think it could handle wood.

    I don't have any experience with milling, but I always thought there must be a reason those machines are always just much bigger and heavier than a 3d printer or a laser.
     
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  6. petethepig

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    Thank you guys, I updated the post with some pictures.
     
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  7. Scotty Orr

    Scotty Orr Journeyman
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    Great job!! Thanks for the added detail!
     
  8. the_greek

    the_greek New
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    Hello. What type of spindle have you attached?
     
  9. petethepig

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    Hi, I'm currently using one of these brushless motors

    It's good enough for drilling small holes, but not good for milling.
     
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  10. syl

    syl New
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    Did you add a place to add an end stop for your z axis? Also how long did it take you to print out the 3d parts on your Prusa?
     
  11. Todd Brous

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    Beautiful design on the Z-axis!

    I love how you have the support for the drag train on the top of the Z motor. I need to do something like this. So smart!

    I noticed that there is a threaded rod inserted in the light-blue 3d printed plastic piece on top of the Z-motor. What is this used for?

    Does the lead screw rub away the red plastic at the bottom of the Z-axis?

    Thanks,
    -Todd
     
  12. petethepig

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    I'm not using any physical endstops, going with TMC 2130 drivers and their stallGuard feature. Speaking of printing, it took around 10 hours for the main part.
     
  13. petethepig

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    Thanks Todd!

    That threaded rod is used as a spool pin for cotton thread. I use it when I make string art.

    Speaking of lead screw and the plastic — it doesn't rub away the plastic, the hole is larger than the lead screw. But I do think putting a bearing there would be a good idea.
     
  14. MatAff

    MatAff New
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  15. petethepig

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    MatAff likes this.
  16. DeltaCon

    DeltaCon New
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    I am thinking of converting this Z-Axis setup to my Stinger Laser. Biggest difference is it has a 40x40 X-Axis rail. I like how compact this setup is. Question though: You are using eccentric nuts on 3d-printed plates. How is that holding up long-term? I always thought that it ould nbot work because it will wear off. How is your experience?
     
  17. DeltaCon

    DeltaCon New
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    Second question: You made STLs of the carriage and the gantry plate with and without supports, but despite the difference in filesize, I see exactly NO difference. How does this work?
     
  18. petethepig

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    That part has been working fine for me so far. Honestly, not sure what you mean by wear in this case. Are you worried the eccentric nuts will kinda rotate and move slightly over time? I haven't seen this happen with my set up. There are nylon nuts on the other side and they seem to be holding the whole thing in place well. This machine only has seen maybe around a 100 hours of work though, so your mileage may vary.

    Yeah, sorry it's not super clear, I answered a similar question on Thingiverse before: OpenBuilds ACRO Z Axis by petethepig
     
  19. DimitriGeelen

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    would be happy to be able to order it as a kit, now scrambling to get all parts together
     
  20. julius64

    julius64 New
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    Hello!, Great job!! I would like to ask you if you have seen any difference in the V-Slot Linear Rails (if the Linear Rails have been distorted for example)??
     
  21. petethepig

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    Hi, are you asking if they bent or deformed or something like that under load?

    No, with this build plastic starts flexing way before aluminum.
     
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