# I need help w/ the 4-link analyzer

Discussion in 'Center Of Gravity' started by SCOOBYDANNN, Nov 26, 2004.

1. ### SCOOBYDANNN1/2 ton status

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I am a first time designer of a 4 link and wanted to use the analyzer for some further info.

I figured out everything pretty easily ,but, where do the x (frame end and axle end) come from?

I have a scale model on graph paper and i think i have all the #'s.

thanks

dan

2. ### Greg72"Might As Well..."Staff MemberSuper Moderator

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SD,

Are you talking about ExcelCAD?

If so, consult the "tab" called "HELP - Coordinate Diagram"....that will show you what the X,Y and Z coordinates are supposed to represent. If you still have questions let me know.

/forums/images/graemlins/waytogo.gif

3. ### SCOOBYDANNN1/2 ton status

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this one. http://home.earthlink.net/~triaged/Files/4LinkCalculatorV1.5.xls

I understand "y" and "z" because it explains it when you drag over the bix, but i just don't understand what numbers it is asking me for for "x". i am assuming it is the length of the links but then i am confused on the "axle end" and "frame end"

in the "upper" box the #'s that are already in there are (32 for the frame and 0 for the axle)

and the lower is (49/f and 3/a) where does that 3 come from?

i do understand these are just thrown in numbers, but the 3 throws me off.

thanks

dan

4. ### Greg72"Might As Well..."Staff MemberSuper Moderator

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Dan,

First of all, do yourself a favor and download a newer version of ExcelCAD....that one you're using is ancient!! /forums/images/graemlins/grin.gif

Get ExcelCAD v2.1 here:

www.gregblanchette.com

Next, for your answer (though it will be more obvious in the version you'll be getting because it's GRAPHICAL)

"X" is referring to the position of the link relative to the axle centerline. In your previous question....one of the links is directly ABOVE the axle centerline, so the value is 0, but the other link is 3 inches offset from the axle, hence the value of 3.

Check out v2.1, it shows not only a side profile of the suspension, but also a top view. Even if you don't understand what all the "blue" cells are for, with some experimentation you'll be able to figure it all out. I believe there is also hidden "comments" on almost every cell to help explain either what kind of value to put in, OR if it's a calculated value...what the value represents.

/forums/images/graemlins/thumb.gif

5. ### SCOOBYDANNN1/2 ton status

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AWESOME! thanks lets see what i can do.

6. ### SCOOBYDANNN1/2 ton status

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holy spit and shenanagins thats about 300x better--thank you.

7. ### Greg72"Might As Well..."Staff MemberSuper Moderator

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Glad you like it. There was a lot of effort involved to get the graphical aspects incorporated into the v2.x releases. /forums/images/graemlins/shocked.gif

Sounds like my effort was not in vain.... /forums/images/graemlins/thumb.gif

8. ### SCOOBYDANNN1/2 ton status

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man thank you---this is gonna really help me understand what is going on when i start this. /forums/images/graemlins/thumb.gif /forums/images/graemlins/thumb.gif

9. ### four_by_ken1/2 ton status

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[ QUOTE ]
Get ExcelCAD v2.1 here:

www.gregblanchette.com

[/ QUOTE ]

I just downloaded this for the first time... all I can say is WOW!

Thanks!
/forums/images/graemlins/thumb.gif

10. ### mnstrburbon1/2 ton statusGMOTM Winner

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Digging up an ancient one here but is this program still available starting a new project and maybe this could help me. the link looks dead? or am i missing it.

11. ### miniwally1/2 ton statusPremium Member

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4 link calculator is still alive and good. Search Triaged on Pirate.

12. ### mnstrburbon1/2 ton statusGMOTM Winner

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Thanks found it now the fun part of figuring it all out..

13. ### howdiy1/2 ton status

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