Post
by philipy » Tue Sep 13, 2022 1:55 pm
To get the curve, I imported your photo into Sketchup and then used the "arc tool" to trace over it. It took a couple of goes to get it acceptable ( to my eyes).
Then I simply joined up the curves with straight lines for the sides and base, so that I ended up with a flat outline of half of the vessel. You can see the black lines on the LH photo on my post above. Next I drew a 9mm radius circle at right angles at the base, selected the edge of the circle, selected the "follow me" tool and clicked on the shape and it instantly rotated it to give the completed vessel.
If you want a more graphical explanation I'll try to do a series of stills.
One thing I should say is that at present it is completely solid, because I didn't want to mess about with hollowing it until I was sure you liked the shape, but that shouldn't be too much of a problem to do before producing the stl's
For printing it, personally I'd try a resin printer ideally, but if you want to use fdm, I very much doubt you would get away with less than 1mm thick walls and you might have to go to 1.5. Having said that, do you really need them completely hollow? Because if they were solid up to a couple of mm below the neck you might have more chance of "balancing" a thin neck on top, if you see what I mean, and painted matt black inside it would hardly be noticeable. I could taper the edge of the neck down to say 0.5 mm but no guarantees that it would print properly, that will depend on your slicer and printer settings, I think.
I know you wanted three of these to match the metal original, but in terms of consistency, you might want to print four and put your original away somewhere for the future, because they won't look absolutely identical.
BTW, do you want an indication of the central horizontal seam, or is that just where the originals are joined in two halves?
Lemme know what you think?
Philip