Self centering vise relationship joints

Self centering vise relationship joints

zenkustumz
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Message 1 of 19

Self centering vise relationship joints

zenkustumz
Advocate
Advocate

hey guys trying to figure out the relationship joints or motion constraints.

 

I already have joint limits but stuck on rotating leadscrew to get both to move away and towards

 

http://a360.co/2mkaVX9

 

Any assistance is greatly appreciated

 

John

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Message 2 of 19

zenkustumz
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http://a360.co/2CJAcjR

 

Updated file

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Message 3 of 19

TrippyLighting
Consultant
Consultant

You simply need to apply a Motion ink with "reverse" enabled between the two last slider joints in your assembly.

 

A couple of other observations:

  1. None of the position capture features in the timeline are needed. They can all be deleted.
  2. When you created the Back Block Stationary. you should have applied Fusion 360's R.U.L E #1 and created an empty component before creating a sketch and geometry. then you should have immediately grounded that component.

 

In general it is a good practice to ground and assemble as soon as you can.

 

 


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Message 4 of 19

zenkustumz
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Hey sir thank you for the huge input,,,

 

2 things can you point me to a video that shows what your talking about?

 

Second I understand the "reverse relationship" whick means they will move away from each other at the same time and distance.. (correct?) how to i relation that to the turning of the lead screw both directions?

 

again if you have a video that might explain.. that would help allot. no professional training here just trial and error and lots and lots of reading and watching video.

 

Thank you in advance!!!!

 

John

 

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Message 5 of 19

TrippyLighting
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Consultant

Looking at your assembly, it has a number of other issues that I want to capture in a screencast/tutorial. But it'l take me a day or so to put that together.


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Message 6 of 19

zenkustumz
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I know i have issues..lmao.. Ya dont have to point the finger at me.... 🙂

 

I'm looking forward to it sir.. waiting patiently.. I really do appreciate your input..

 

I think my ideas are solid but i think my steps are rudimentary and maybe out of sinc with how I should be doing at set practice...

 

Thanks again in advance,

 

John

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Message 7 of 19

TrippyLighting
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Consultant

@zenkustumz wrote:

I know i have issues..lmao.. Ya dont have to point the finger at me.... 🙂

 

I'm looking forward to it sir.. waiting patiently.. I really do appreciate your input..

 

I think my ideas are solid but i think my steps are rudimentary and maybe out of sinc with how I should be doing at set practice...

 

Thanks again in advance,

 

John


 

I am not going to point my finger at you!

I have analyzed hundreds of assemblies created in Fusion 360 created by all sorts of people, some new to CAD and 3D modeling, some seasoned veterans.

Some of these issues I've seen so often that it might be time to cover these in a little tutorial that I can refer to whenever this issues come up.

 

So thank you for providing a neat little assembly do do this with 😉


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Message 8 of 19

zenkustumz
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Hope you know i was joking....

 

 

I have way thicker skin than that.. I am really looking forward to seeing this tutorial ...

 

 

Thank you sir for being a great mentor..

 

John

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Message 9 of 19

TrippyLighting
Consultant
Consultant

Here's the tutorial that discusses the room for improvements. I plan to make a second video to show how to fix this. I recorded this with Screenflow because the screencast software creates terrible video quality with recordings in full resolution. It's now on my small youtube channel so others can benefit from it. Hopefully it helps!

 

 


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Message 10 of 19

zenkustumz
Advocate
Advocate

ok.. Awesome walk thru..

 

Where can i start to understand the steps of making a drawing? I understand allot of what you were talking about but I think i need to go back to basics to consume this information.

 

when i start a drawing I typically use the front or top face but not sure on how to orient the part with the orientation? In CAM I know I can pick a point but the drawing is already drawn. how do you decide how or where to orientate the part? always the center front face??

 

I'd like to do this the right way because i think this will really help me understand how to do things correctly..

 

I really appreciate your assistance. I have lots of questions though..

 

John

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Message 11 of 19

TrippyLighting
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Consultant

@zenkustumz wrote:

Where can i start to understand the steps of making a drawing? I


 

Lets start with the proper terminology. When designing in 3D you start with making a model, not a drawing 😉

 

For me personally the initial orientation of a component does not matter so much. Looking at the view cube, I usually orient it in a way so that what I consider to be the front lines up with how it is labeled in the view cube in the upper right corner of Fusion 360. In a 3D environment where objects can have any orientation it's not really so important.

 

If you do CAM work, make sure your coordinate system is set to Z-up. And maybe you want to orient your components so that they are oriented how they are in your main CAM setup where you do most of the machining work.

 

As to where do I start with a sketch, for me the main guideline is whether there are any symmetries. So all of the components in this assembly are symmetric about one plane so I'd make sure that sketches are centered, unless of course I am only making half a sketch and then mirror the geometry.


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Message 12 of 19

zenkustumz
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Advocate

I have started to do a complete redraw.. Hope fully with some success in things you talked about.

 

Orientation will be drawn as to how the parts will be assembled.. Front being front, top being top.. etc..

 

I have grounded the first part, made it a componet but have not placed the bearing where it needs to go..

 

Please look at the drawing and let me know if i am on the right track or please address what needs to be corrected..

 

http://a360.co/2AUZWrK

 

John

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Message 13 of 19

TrippyLighting
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Consultant

It's a start. Here's my response:

 

 


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Message 14 of 19

zenkustumz
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how do i get the color coding like you have in the drawing?

 

Component was red for everything that was included?

 

John

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Message 15 of 19

zenkustumz
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There is allot i do not know.. I can see that my model skills are very rudimentary. When making the slotted hole, I made 2 circles then attached a line as tangent then deleted the inside of the circle.

 

Of course I did that twice. I really appreciate the walk thru with audio, its helped me immensely.. please just comment if this model is now the correct way.

 

http://a360.co/2D5Pp31

 

 

 

John

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Message 16 of 19

TrippyLighting
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Consultant

Yep, thats it!


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Message 17 of 19

zenkustumz
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Black redraw of model was just wayyyyyyyyyy smoother.

 

I love the short cuts and understanding that once you apply dimensions and relationships to edges its makes  drawing non movable.

 

http://a360.co/2D79Lc9

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Message 18 of 19

zenkustumz
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Advocate

redraw of lead screw model.

 

I think its correct but honestly not sure.

 

http://a360.co/2CW4znm

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Message 19 of 19

TrippyLighting
Consultant
Consultant

The parts themselves incl. sketches extrusions etc are much better.

You still need to work on structure. If you design a single discrete part in its own file that you want to later insert into an assembly then you don't need to create a component in that design. Each design file in Fusion 360 already is a component.

 

The fix is easy. Simply export that extra component into it's own file:

 

Screen Shot 2018-01-13 at 1.48.12 PM.png


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