Yoda Bust(s)

I have been printing Yoda busts on my Rostock Mini.
yoda_on_printer

The first (small) sized one printed very well, but I had some problems when I tried scaling up to 160% size.
largeYodaHead

If you look closely, it has a small discontinuity just above the eyes. (It looks like the top of his head was sliced off and put back on slightly “off”.)
yoda_medium_slice

It looks like one of my axis lost a step, so I ran through various diagnostics (more airflow over the stepper drivers, higher current to the steppers, upgrading my slicing software, etc) and eventually the problem got worse:
lobotomized_yoda

Then I heard some squeaking from my 3D printer and started to move things around manually to isolate it and I realized that my straight rods and linear bearings were dry. The final solution was to oil my straight rod and liner bearings, although I can’t confirm that the upgrade to Slic3r didn’t also help things out. All in all, it only took four tries to get things right:

four_yodas

So now I have a large yoda head to float on my desktop levitation box:
floating_yada_head

3 thoughts on “Yoda Bust(s)

  1. Hallo, would you mind to share more information about your desktop levitation box?
    It is exactly the toy I would like to buy to show in my science class, although products I found are in 100$ range

    • That specific desktop levitator is a “Levitron Revolution Levitating Platform by FASCINATIONS”, but I am not sure if they are still selling the product (perhaps their patent ran out?) as I’ve found a lot of different options. It did cost around 80$.

      The closest similar item I could find today was this $60 unit:

      https://amzn.to/3k8qQUt

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