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Turbo Talk => 3D Printing and TurboCAD => Topic started by: Jeffin90620 on December 18, 2017, 05:14:43 PM

Title: Another batch of earrings
Post by: Jeffin90620 on December 18, 2017, 05:14:43 PM
These three were, as usual, 3D printed in wax and packed in sand before molten brass was added in a traditional cast pour, followed by hand polishing.  The first two models had to have the cross-section increased by 10% for proper printing, even though they were already some 11% larger than the specified minimum width.  Go figure.

The polishing looks better than previous earrings I have made at Shapeways; I guess they are refining their technique.

I'm including renderings of the designs for comparison.

I do not claim any particular skill as an artist.  I pretty much just availed myself of TurboCAD's functionality.

#12 was originally a Rail Sweep of a rectangle along with Pattern on Polyline for the ellipsoidal solid, but I had to Explode a few times and re-position the ellipsoidal solids for an aesthetically-pleasing result.

#13 was done with a Rail Sweep of a rectangle with a Twist of (IIRC) 2800°, plus a properly-sized Sphere at the end to minimize hair grabbing.

#14 combined a Rail Sweep of a Filleted Rectangle (producing the donut shape) that was used for a Pattern on Polyline.  The variables were adjusted so the the donuts overlapped, providing all the structural support.

Keep in mind that my girlfriend prefers teardrop-shaped earrings, so I am working within that guideline.


Jeff

Title: Re: Another batch of earrings
Post by: Henry Hubich on December 18, 2017, 06:01:20 PM
Congratulations, Jeff; they're gorgeous.

Henry H
Title: Re: Another batch of earrings
Post by: Tim Stewart on December 19, 2017, 05:12:43 AM
Nice work Jeff,

    just as a matter of interest, how much do they each weigh?
    That's a girlie question from Mrs S.   :)

Regards Tim
Title: Re: Another batch of earrings
Post by: Jeffin90620 on December 19, 2017, 03:16:34 PM
    just as a matter of interest, how much do they each way?
    That's a girlie question from Mrs S.   :)

I have not weighed them, but my girlfriend says that they are very light (even the first two, which had to have their cross-section increased by 10% from my original design to be properly fabricated).

#12's volume is 250 cubic mm.  The density of brass is 0.0084 to 0.00873 grams per cubic mm, so #12 is 2 grams, or 0.07 ounces.  The other two would be approximately the same.


Jeff
Title: Re: Another batch of earrings
Post by: Don Cheke on December 19, 2017, 04:12:34 PM
Great job on the ear rings Jeff. I particularly like the 1st set.

Curious if you are selling your creations or if your girlfriend is your only intended beneficiary?
Title: Re: Another batch of earrings
Post by: Jeffin90620 on December 19, 2017, 04:54:13 PM
So far, I haven't opened up my models to the Shapeways Store.  Part of it is that my girlfriend has unique, one-of-a-kind earrings; part of it is that my fragile ego is spared the indignity of her having unique, one-of-a-kind earrings if the rest of the world has no interest in my designs.  ;)

Never really checked out Shapeways' pricing structure, either.


Jeff
Title: Re: Another batch of earrings
Post by: Tim Stewart on December 20, 2017, 02:43:30 AM
    just as a matter of interest, how much do they each weigh?
    That's a girlie question from Mrs S.   :)

I have not weighed them, but my girlfriend says that they are very light (even the first two, which had to have their cross-section increased by 10% from my original design to be properly fabricated).

#12's volume is 250 cubic mm.  The density of brass is 0.0084 to 0.00873 grams per cubic mm, so #12 is 2 grams, or 0.07 ounces.  The other two would be approximately the same.


Jeff

    Thanks Jeff

Regards Tim