3D print a Scribbler battery cover? Files attached

Hi All,

We get occasional requests for replacement Scribbler battery hatch covers. Since the Scribbler molded parts are made in a set, we don't have a ready source of spares, and 3D printing came to mind as a possible solution. Ken obtained an .stl file for the battery cover, and I'm posting it here. I'm curious how well this might work - is it flexible enough for the latch? Do the hinge tabs print thin enough to fit? Do variations in material and printer resolution call for slight adjustments?

If anyone with a 3D printer and a Scribbler gives this a try, I'd love to hear what you used and how it turns out. Any vintage Scribbler will serve — the compartment changed with S3 but the cover did not — and there are still Scribbler 1's and 2s serving in classrooms.

Thanks!

-Stephanie Lindsay

Comments

  • 5 Comments sorted by Date Added Votes
  • Hopefully this works well enough for most people. Results will vary by 3D printer and material used. Those tabs will be fragile!

    Another alternative for Parallax is to have an injection mold made. That's a simple part, so a 2-part mold will work, no slides. Soft tooling (aluminum) is relatively cheap & fast, sufficient for low-volume molding. Molded parts (especially those thin tabs) would be much stronger than any 3D printer could make. And since it's strictly a functional, nearly hidden part on the robot's soft underbelly(!), people are apt to be less picky about finish & color match. Not necessary to polish the mold (the cutter-mark finish is fine, just like Arlo's chassis) and just pay a vendor to mold a big batch in most any color (black is cheapest, because it's full of regrind).

    A second, even cheaper alternative is to make a silicone mold off an existing door and cast it in Ciba or another resin. Perfect finish and stronger than the original ABS part. I know a dozen guys who can do that for you. There are several Ebay vendors who make tidy profits by casting battery doors for old robot toys such as red venom repros: https://www.ebay.com/itm/AHI-1977-LOST-IN-SPACE-ROBOT-BATTERY-COVER/372154137570

    In fact, just send those guys a battery cover and they'll make & sell them on Ebay, problem solved.
    "When you make a thing, a thing that is new, it is so complicated making it that it is bound to be ugly. But those that make it after you, they don’t have to worry about making it. And they can make it pretty, and so everybody can like it when others make it after you."

    - Pablo Picasso
  • Thanks for the input Erco! I hadn't thought of the eBay solution, that's an interesting one.
  • JonnyMacJonnyMac Posts: 5,868
    edited December 6 Vote Up0Vote Down
    Ken obtained an .stl file for the battery cover...
    I did that for him -- in case there are troubles, these are the steps that I followed.

    1) Downloaded and installed trial version trial version of Creo (don't do this unless you want calls from their sales department)
    2) Exported door from Creo as STEP file (attached)
    3) Imported STEP into FreeCAD, exported from FreeCad as STL
    4) Opened in MakerBot software to ensure bottom surface is at Z = 0 (screen shot is from this software)

    I don't have a printer big enough to print the door. It should be clear by the steps that mechanical things are not my strong suit -- still, I muddle along and get things done. I'm also going to checkout Eric's eBay link.
    Jon McPhalen
    Hollywood, CA
    It's Jon or JonnyMac -- please do not call me Jonny.
  • Much appreciated, JonnyMac! (Including the warning about Creo's sales folk).
  • I put in a request to a friend with a nice Mojo printer. Will advise.
    "When you make a thing, a thing that is new, it is so complicated making it that it is bound to be ugly. But those that make it after you, they don’t have to worry about making it. And they can make it pretty, and so everybody can like it when others make it after you."

    - Pablo Picasso
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