iTopSpin
Current Posts => Collecting, Modding, Turning and Spin Science => Topic started by: Iacopo on May 01, 2018, 04:27:22 PM
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I tried to use a taper joint instead of the usual screw joint, in this new top, for the replaceable tips.
I found taper joints are more suitable for mounting the tip on the top accurately centered.
This partly saves from the job of having to balance the top, after a tip replacement.
(https://i.imgur.com/4lsv4xy.jpg)
https://www.youtube.com/watch?v=1sVH-Tv_M1w
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They just keep getting more beautiful, Iacopo -- and also more sophisticated. Great idea on the taper joint!
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They just keep getting more beautiful, Iacopo -- and also more sophisticated. Great idea on the taper joint!
Jeremy is right! You keep raising the bar of your already superb work. 8)
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Thank you. I put a bit of extra effort making this one, I am glad if this is visible.
The taper joint seems to work great, probably I will adopt it definitively.
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Here is another top with taper joint for replaceable tips.
In this case the tips are simple balls, with diameter 3/16";
balls of whatever material can be used, from inexpensive ones like those made of carbon steel or teflon, to more expensive like ruby balls. When a tip is weared, it is simply replaced, which is an easy task.
The top maintains a good balance, after a tip replacement, thanks to the characteristic precision of taper joints.
In any case, if perfect balance is wanted, it is possible to fine tune it, thanks to the screws in the flywheel, by which it is possible to shift slightly the position of the center of mass of the top, and to align it exactly with the tip. When this is done, the wobbling due to unbalance disappears completely.
(https://i.imgur.com/HlSlV8a.jpg)
https://www.youtube.com/watch?v=pSCqCPD79iY
In the following video I explain how to adjust the position of the screws:
https://youtu.be/83dlHf7ZyuY?t=185
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So nice a top, as always. 8) And the videos make them justice.
Thanks for making them and sharing their beauty!
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Stunning!
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Thank you !
I have upgraded the lathe, adding a drill to it, but I didn't want to spend much money so I bought a relatively inexpensive air drill.
It works well, but the chuck was very inaccurate, the bits mounted in it wobbled a lot;
I found a way to fix this problem, which worked decently, so I will make a video about it. This isn't strictly related to spinning tops, but it could be helpful for top makers having to deal with an untrue chuck.
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As amazing as these tops look, they look too nice to be spin. They look like they should be in an art museum. Even how you make them is art.
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As amazing as these tops look, they look too nice to be spin.
Thank you.
I like to make them so, and this is a reason that I haven't made yet throw tops, in fact, (but it would be an interesting project).
There isn't much risk to damage a finger top, while using it.
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Nr. 34 and 35 are both beautiful, but I prefer the proportions of Nr. 35's flywheel.
The taper joint ball mounts are a great way to keep these tops useable throughout their life times, which I'm sure will be measured in centuries. Your tops deserve to move, not just to gather dust on a shelf.
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I prefer the proportions of Nr. 35's flywheel.
Aerobie asked for these proportions. He sent me one of his tops, long time ago, now I made this one for him.
Hope he will like it, when he receives it.
Technically the Nr. 35 is better for easy maintenance, but the Nr. 34 can spin almost twice longer than the Nr. 35.
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I added a drill to my lathe, this will make easier some drilling operations.
But I have not been lucky, and the air drill I ordered had a quite inaccurate chuck that made the tool of poor usability.
Instead of sending back the drill, I decided to try to adjust it.
The reason is that this chuck is an inexpensive one, and probably a new one would have not performed much better.
Also, the adjustment of the chuck wasn't so labor intensive. If it didn't work, I would have bought a new, better quality chuck, for this drill.
https://www.youtube.com/watch?v=VKFE7WKtBWI
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Technically the Nr. 35 is better for easy maintenance, but the Nr. 34 can spin almost twice longer than the Nr. 35.
Nr. 34's much shorter tip-CM distance probably has a lot to do with that. I'd love to see the specs for both.
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Nr. 34's much shorter tip-CM distance probably has a lot to do with that. I'd love to see the specs for both.
Yes, the recessed tip helps a lot. Then the Nr. 34 is heavier, (which helps too), and uses spiked carbide tips and carbide spinning surfaces, wich are superior to ball tips and glass spinning surfaces, as for spin times.
The basic specs are:
Top Nr. Weight Diameter Tip-CM distance Spin times up to
grams mm mm minutes
34 313 60 1.5-2.0 about 55
35 147 60 8.5-9.0 about 30
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I prefer the proportions of Nr. 35's flywheel.
Aerobie asked for these proportions. He sent me one of his tops, long time ago, now I made this one for him.
Hope he will like it, when he receives it.
Technically the Nr. 35 is better for easy maintenance, but the Nr. 34 can spin almost twice longer than the Nr. 35.
Of course I like it. I love it. A work of art.
Iacopo is the Stradavari of tops.
Alan
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I added a drill to my lathe, this will make easier some drilling operations.
But I have not been lucky, and the air drill I ordered had a quite inaccurate chuck that made the tool of poor usability.
Instead of sending back the drill, I decided to try to adjust it.
The reason is that this chuck is an inexpensive one, and probably a new one would have not performed much better.
Also, the adjustment of the chuck wasn't so labor intensive. If it didn't work, I would have bought a new, better quality chuck, for this drill.
https://www.youtube.com/watch?v=VKFE7WKtBWI
Center-adjustable chucks are available for a few hundred dollars. I use this feature in mine every day. 4 set screws on the perimeter of the chuck shift the chuck body laterally on a mounting plate. It's much faster than the old "gold standard" of a 4-jaw chuck.
An example is: I machine much of the bottom and OD of a top. Then I reverse it in the chuck to machine the upper part. Even though it's round, it won't clamp perfectly centered. So I use this feature of the chuck and a dial indicator to center it to about .0001".
Here's one.
http://www.shars.com/products/workholding/lathe-chucks/6-3-jaw-0005-adjustable-universal-chuck-2-piece-jaws
Alan
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Of course I like it. I love it. A work of art.
Iacopo is the Stradavari of tops.
Alan
Thank you, Alan, you are very kind.
Center-adjustable chucks are available for a few hundred dollars. I use this feature in mine every day. 4 set screws on the perimeter of the chuck shift the chuck body laterally on a mounting plate. It's much faster than the old "gold standard" of a 4-jaw chuck.
This is interesting. I have a 4 independent jaws chuck which I use when I need precision in centering, but I have not the possibility to shift the chuck body laterally. An upgrade to consider.