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I currently have a model in fusion 360 of cylinders with the largest being 40" diameter in a specific pattern as seen below. My printer is a Ender-3x with the build plate dimensions of 8.7" x 8.7" x 9.8"

I need to break this model into 5 pieces of exactly equivalent length so I can print same piece 5 times to equal a full cylinder

enter image description here

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You've got several options:

Generate full-size STL, cut via software later

If you just have an STL, you can use software such as Meshmixer to modify it. In this case, a plain plane cut would suffice.

Modifiy the design file

A better way is to go into the design file (in your case fusion) and modify it there. In your case, it's rather easy:

  • add a construction plane
    • choose the right constraints, e.g. an angle to the XZ plane or a distance to the XY plane
  • choose the model
    • Edit > split model
    • choose the construction plane you made
  • rinse and repeat

If you want to get rid of parts that became superfluous after this, use the remove option, not the delete option, as the later tries to make sure that the object never was made in the workflow.

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  • $\begingroup$ While this works I realized I can't delete the remaining objects that I don't need without it reverting the split and putting the object back together. more then likely something in doing wrong $\endgroup$
    – Ragekillen
    Feb 26, 2019 at 22:03
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    $\begingroup$ @Ragekillen use remove. $\endgroup$
    – Trish
    Feb 26, 2019 at 22:32
  • $\begingroup$ I might add that it might be simpler to cut into 6 or 8 sections for symmetry. And more important: redesign the subsection with some sort of interlocking tabs to facilitate assembly. And don't pull a Morton-Thiokol! $\endgroup$
    – Carl Witthoft
    Feb 27, 2019 at 18:51
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    $\begingroup$ @CarlWitthoft for radial cuts? yes. I actually prefer to make interlocking parts with some complex cutter (Dovetail is lovely), but those are not simple... $\endgroup$
    – Trish
    Feb 27, 2019 at 19:10
  • $\begingroup$ thanks everyone. I completed my model yesterday and @Carl Witthoft I already had thought about interlocking tabs so i made small cylinders that will slide into an equivalent sized whole( most likely will have to super glue them for a finishing touch but o well). finished product can be seen here if interested gyazo.com/b7469709c80d776467f8aaf4acb3de15 $\endgroup$
    – Ragekillen
    Feb 28, 2019 at 7:58

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