Hello
I have a basic assembly with just 2 parts and would like the small disc to rotate eccentric to the large disc. That is, it should rotate off-centre.
Is there a way to define the small disc's axis of rotation without explicitly creating a shaft?
Any help will be appreciated.
John
There are several ways you could accomplish that. One would be to place a sketch point on the large cylinder where you want the center of rotation for the small one, then place a concentric mate between the outside (the cylindrical surface) of the small cylinder and the sketch point.
That seems to automatically shift the small disc to the point where the point becomes the centre of the small disc. I'm hoping to keep the disc as it currently is, just with the axis of rotation shifted.
John Munroe wrote:
That seems to automatically shift the small disc to the point where the point becomes the centre of the small disc. I'm hoping to keep the disc as it currently is, just with the axis of rotation shifted.
I thought that was what you wanted, but apparently not. Do you want the small disc to rotate about a point that's not at it's own centerpoint? If that's not it, then maybe I'm just slower than usual today, but can you please explain further?
Sorry for not having been clearer. I'm trying to make the small disc rotate about a point that is off-centre, like
That is, if it were to rotate, it'd look like the following:
But if I set a concentric mate between the point and the small disc, I get
The result is that the point becomes the centric point of the small disc. I'd like to be eccentric.
Hopefully the explanation is better this time. Let me know if I'm missing something.
Cheers
I'd recommend creating an axis on the small disc where you want the center of rotation (in it's Part file, not in the Assembly). Then place a sketch point on the large disc where you want the center of rotation for the small disc to be. Finally create a coincident mate between the axis and sketch point.
Hi John,
I think that you can use the axis and mate it to a sketch point which would define the location of the eccentric location.
Leszek
Hi
So, do you mean use an existing axis or create a new one? Which axis is needed?
Cheers
You just need to create a axis at the center of your eccentric shaft location, not the center of the small disc. Another thing is you could put a really small hole, (.00001") there as well and then show the temporary axis, that way you have a dimensional value that can be changed, but the model is still locked in...
I'd recommend creating an axis on the small disc where you want the center of rotation (in it's Part file, not in the Assembly). Then place a sketch point on the large disc where you want the center of rotation for the small disc to be. Finally create a coincident mate between the axis and sketch point.