On 2018-12-16 10:54 p.m., StephenS wrote:
...
> Three of the gears I've cut from sheet metal (thirteen in total) and 
> some I've modeled.

I'll need to wait for more material to show up.

I think I should start with something easier, planetary gears (epicyclic 
gears). Then work my way up to something with more parts.

The gears are generated from a web site, 
http://hessmer.org/gears/InvoluteSpurGearBuilder.html

I download the .dxf file, feed it into the Plasma Cutter, grind some of 
the rough edges.

I model a gear tooth, from the .dxf file, into a prism{}.

Stephen S

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Attachments:
Download 'gear_pic_.png' (1127 KB)

Preview of image 'gear_pic_.png'

On 2018-12-17 2:25 a.m., Thomas de Groot wrote:
...
> An Aztec Calendar is what I would attempt.
> 

The calendar looks like two rings that slide on each other, or am I 
seeing it wrong? Gears in stone?

Stephen S

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On 2018-12-17 9:13 a.m., jr wrote:
...
> I've always liked mobiles and such, so I'll suggest some kind of "kinetic art"
> sculpture/structure/arrangement.
...Small arrangement to start I think.

Stephen S

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On 2018-12-17 10:30 a.m., ingo wrote:
...
> http://americanhistory.si.edu/collections/search/object/nmah_998869
> 
> ingo
> 

More gears and less other things to start I think.

Stephen S

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On 2018-12-17 2:07 p.m., Bald Eagle wrote:
...
> Nice - good to see you've worked out the undercut on the small gear   :)
...
I only worked out what web site to download from ;-)
...>... list longer than one life time to complete...
> 

Stephen S

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On 2018-12-17 7:40 p.m., StephenS wrote:
...
> I think I should start with something easier, planetary gears (epicyclic 
> gears). Then work my way up to something with more parts.
...30 tooth inside
4 x 10 tooth outside

Comments Welcome:

Stephen S

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Attachments:
Download 'gear_test_a.png' (73 KB)

Preview of image 'gear_test_a.png'

StephenS schrieb:
> Comments Welcome:

The gears would be much more impressive if they were moving.

Regards,

Gregor

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On 18-12-2018 1:43, StephenS wrote:
> On 2018-12-17 2:25 a.m., Thomas de Groot wrote:
> ...
>> An Aztec Calendar is what I would attempt.
>>
> 
> The calendar looks like two rings that slide on each other, or am I 
> seeing it wrong? Gears in stone?
> 

I hate it when I am unable to find back what I am looking for :-/

If I remember well, it consists of three geared wheels, one involute. I 
must have a picture somewhere as I intended years ago to make an 
animation from it. I keep looking...


-- 
Thomas

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On 18-12-2018 8:49, Thomas de Groot wrote:
> On 18-12-2018 1:43, StephenS wrote:
>> On 2018-12-17 2:25 a.m., Thomas de Groot wrote:
>> ...
>>> An Aztec Calendar is what I would attempt.
>>>
>>
>> The calendar looks like two rings that slide on each other, or am I 
>> seeing it wrong? Gears in stone?
>>
> 
> I hate it when I am unable to find back what I am looking for :-/
> 
> If I remember well, it consists of three geared wheels, one involute. I 
> must have a picture somewhere as I intended years ago to make an 
> animation from it. I keep looking...
> 
> 

This is the sort of construction which I mean:

https://www.youtube.com/watch?v=BPbZNUd3Vy4
https://www.youtube.com/watch?v=qhWItvjk9Yg

-- 
Thomas

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On 2018-12-18 3:05 a.m., Thomas de Groot wrote:
...
> This is the sort of construction which I mean:
> 
> https://www.youtube.com/watch?v=BPbZNUd3Vy4
> https://www.youtube.com/watch?v=qhWItvjk9Yg
> 

I like the first one. I would need to make the pictures for it to have 
meaning, not my best area for modeling.

Stephen S

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