bearings

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bearings

jon_bondy
A friend told me about these designs:

https://www.thingiverse.com/thing:4821342

https://www.thingiverse.com/thing:2375124

One requires Fusion 360 and the other only provides STL files. Has
anyone tried to create similar objects in a parameterized fashion using
OpenSCAD?

I am told that they work really well.

Jon
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Re: bearings

adrianv
The second one says "ball bearings fail".  Is that a real issue for manufactured bearings?  (They all seem to be ball bearings.)  Or just a problem with 3d printed bearings?  

I haven't seen bearing designs in OpenSCAD.  I did notice the second one includes a video on how to make your own bearings in fusion 360.  Presumably one could watch that to learn how to build the design in OpenSCAD.

jon_bondy wrote
A friend told me about these designs:

https://www.thingiverse.com/thing:4821342

https://www.thingiverse.com/thing:2375124

One requires Fusion 360 and the other only provides STL files. Has
anyone tried to create similar objects in a parameterized fashion using
OpenSCAD?

I am told that they work really well.

Jon
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Re: bearings

drxenocide
My guess:

module template(){
    square()
    circle()
    }

module balls(){
    rotate_extrude()
         template(); //right half of it anyway
    }

module housing(){
    rotate_extrude()
         difference(){
             translate(x=inner_d) square();
             template();
             }
    }
module angular_bushings(){
    difference(){
        cylinder();
        housing();
        for(i=[0:n-1])
            balls();
    }

Thats the basic pseudocode I would use, and then the million dollar question is how you use scale and/or resize as a function of a parameter "tolerance", in order to arrive at a bearing that works. Good luck.

On Sun, May 30, 2021 at 8:54 AM adrianv <[hidden email]> wrote:
The second one says "ball bearings fail".  Is that a real issue for manufactured bearings?  (They all seem to be ball bearings.)  Or just a problem with 3d printed bearings?  

I haven't seen bearing designs in OpenSCAD.  I did notice the second one includes a video on how to make your own bearings in fusion 360.  Presumably one could watch that to learn how to build the design in OpenSCAD.

jon_bondy wrote
A friend told me about these designs:

https://www.thingiverse.com/thing:4821342

https://www.thingiverse.com/thing:2375124

One requires Fusion 360 and the other only provides STL files. Has
anyone tried to create similar objects in a parameterized fashion using
OpenSCAD?

I am told that they work really well.

Jon
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To unsubscribe send an email to [hidden email]


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Re: bearings

Gene Heskett
In reply to this post by adrianv
On Sunday 30 May 2021 08:53:48 adrianv wrote:

> The second one says "ball bearings fail".  Is that a real issue for
> manufactured bearings?  (They all seem to be ball bearings.)  Or just
> a problem with 3d printed bearings?
>
> I haven't seen bearing designs in OpenSCAD.  I did notice the second
> one includes a video on how to make your own bearings in fusion 360.
> Presumably one could watch that to learn how to build the design in
> OpenSCAD.
>
>
> jon_bondy wrote
>
> > A friend told me about these designs:
> >
> > https://www.thingiverse.com/thing:4821342
> >
This one I tried as priint in place, failed dead solid. Probably the
printers fault.

> > https://www.thingiverse.com/thing:2375124

This one I haven't tried. But it sure looks promising, and should not be
that hard to do in OpenSCAD. Doing the bearings OTOH, would be an
assembly job in opescad, and the constant jumping from one to the next
by the printer might be a major cleanup since you'd need quite a few.

I cheated a bit and made ball bearings for all the bearings in a harmonic
drive. Out of crosman bb's.  Worked surprisingly well. Including the 3
wide wrapped around an excentric armature.

> > One requires Fusion 360 and the other only provides STL files. Has
> > anyone tried to create similar objects in a parameterized fashion
> > using OpenSCAD?
> >
> > I am told that they work really well.

They do indeed.

> > Jon
> > _______________________________________________
> > OpenSCAD mailing list
> > To unsubscribe send an email to
> >
> > discuss-leave@.openscad
>
> --
> Sent from: http://forum.openscad.org/


Cheers, Gene Heskett
--
"There are four boxes to be used in defense of liberty:
 soap, ballot, jury, and ammo. Please use in that order."
-Ed Howdershelt (Author)
If we desire respect for the law, we must first make the law respectable.
 - Louis D. Brandeis
Genes Web page <http://geneslinuxbox.net:6309/gene>
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Re: bearings

softfoot
 >>> Sorry, this should have gone to the list. <<<

I've done some "print in place" items that have worked surprisingly
well, but you need a printer that is well calibrated and can print
normal items cleanly with a good surface finish and minimal "stringing",
especially if the inter-item gap is very small.


Good luck,
Dave

On 30/05/2021 16:34, Gene Heskett wrote:

> On Sunday 30 May 2021 08:53:48 adrianv wrote:
>
>> The second one says "ball bearings fail". Is that a real issue for
>> manufactured bearings? (They all seem to be ball bearings.) Or just
>> a problem with 3d printed bearings?
>>
>> I haven't seen bearing designs in OpenSCAD. I did notice the second
>> one includes a video on how to make your own bearings in fusion 360.
>> Presumably one could watch that to learn how to build the design in
>> OpenSCAD.
>>
>>
>> jon_bondy wrote
>>
>>> A friend told me about these designs:
>>>
>>> https://www.thingiverse.com/thing:4821342
>>>
> This one I tried as priint in place, failed dead solid. Probably the
> printers fault.
>
>>> https://www.thingiverse.com/thing:2375124
> This one I haven't tried. But it sure looks promising, and should not be
> that hard to do in OpenSCAD. Doing the bearings OTOH, would be an
> assembly job in opescad, and the constant jumping from one to the next
> by the printer might be a major cleanup since you'd need quite a few.
>
> I cheated a bit and made ball bearings for all the bearings in a harmonic
> drive. Out of crosman bb's. Worked surprisingly well. Including the 3
> wide wrapped around an excentric armature.
>
>>> One requires Fusion 360 and the other only provides STL files. Has
>>> anyone tried to create similar objects in a parameterized fashion
>>> using OpenSCAD?
>>>
>>> I am told that they work really well.
> They do indeed.
>
>>> Jon
>>> _______________________________________________
>>> OpenSCAD mailing list
>>> To unsubscribe send an email to
>>>
>>> discuss-leave@.openscad
>> --
>> Sent from: http://forum.openscad.org/
>
> Cheers, Gene Heskett
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Re: bearings

TLC123
In reply to this post by jon_bondy
https://www.thingiverse.com/thing:2437268

Sent from the OpenSCAD mailing list archive at Nabble.com.

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Re: bearings

jon_bondy

Perfect!  Thank you!!


On 5/30/2021 1:54 PM, TLC123 wrote:
https://www.thingiverse.com/thing:2437268

Sent from the OpenSCAD mailing list archive at Nabble.com.

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