3D Printing Thin transition shroud

Discussion in '3-D Printing and Related topics' started by matthewdlaudato, Aug 12, 2019.

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  1. Aug 12, 2019 #1

    matthewdlaudato

    matthewdlaudato

    matthewdlaudato

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    Started to build a Fliskits Morning Star, and saw that the card stock with both the transition shroud and the 5-fin marking guide was missing. Immediately set out to design a shroud. Some careful measurements and one new technique later (creating a ‘loft’ between two sketches in Fusion 360) and I printed this.

    IMG_3712.jpg
    IMG_3713.jpg

    The wall thickness in F360 is 0.45mm (set to match the default extruded width on my Prusa MK3). Prusa Slicer has a checkbox for ‘detect thin walls’ which resulted in a wall thickness of about 0.5-0.75mm. Very happy with the result, the centering ring slides about halfway in, and the shroud mates to the larger tube perfectly.

    IMG_3714.jpg

    Now on to the 5-fin marking guide!
     
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  2. Aug 12, 2019 #2

    vcp

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  3. Aug 12, 2019 #3

    matthewdlaudato

    matthewdlaudato

    matthewdlaudato

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  4. Aug 13, 2019 #4

    matthewdlaudato

    matthewdlaudato

    matthewdlaudato

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    Designed the 5-fin marking guide. Was pretty easy - a circle sketch, then offset it by 1mm, extrude it to 15mm height to create the basic cylinder. Then another sketch of a small rectangle in a plane containing the z-axis. The rectangle is then extruded to cut into the outer face of the cylinder to create the first marking notch. Finally, created a circular pattern with 5 copies of the notch. Very useful techniques, and now trivial to create n-fin marking guides for any tube diameter.

    IMG_3716.jpg
     
  5. Aug 13, 2019 #5

    matthewdlaudato

    matthewdlaudato

    matthewdlaudato

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    Another design for a fin marking guide, this time replacing the notch with a slot. Same technique of creating a sketch (of a slot this time) in a plane perpendicular to the base of the cylinder, then extruding the sketch, and finally duplicating it in a circular pattern.

    IMG_3719.jpg
     
  6. Aug 13, 2019 #6

    dr wogz

    dr wogz

    dr wogz

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    Matt,

    curious question: when you make your slots & notches, is the work-plane thru the center of the cylinder, or do you make one parallel to either the XZ or YZ plane and tangent to the cylinder body?
     
  7. Aug 13, 2019 #7

    matthewdlaudato

    matthewdlaudato

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    The plane for the slot or rectangle sketch is either XZ or YZ (doesn’t matter which). I center the sketch on the Z axis, so that I’m extruding along a radius of the cylinder. I picked up the basic technique from this video:
     
  8. Aug 13, 2019 #8

    dr wogz

    dr wogz

    dr wogz

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    thanks, just curious. Iv'e done both ways, and each has advantages depending on what else is being added..
     
  9. Aug 15, 2019 at 12:04 PM #9

    matthewdlaudato

    matthewdlaudato

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    Printed the slot version last night, works perfectly. I might increase the wall thickness to 2mm as it is a bit flimsy, but that’s a minor issue. 5 perfectly spaced lines on my BT-50 tube!
     

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