ATTN: Robrob; String alignment calculator
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Joined: Apr 2012
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ATTN: Robrob; String alignment calculator
Robrob,I wanted to PM this to you but I think your inbox is full.
I really like the idea of your string alignment calculator but the link to it on your website is broken. I have done quite a few string alignments before and setting up the strings parallel to the centerline is always the part that takes the longest, especially with an unknown track difference. If you don't mind, I would like to see the formulas used in your program so I can replicate it in Excel for personal use. I understand how you calculate the toe and toe angle, the thrust angle, and the angle between the chassis center line and strings, but it seems like all of these rely on having the strings already parallel with the the center line and equidistant side to side. It seems like you have track difference as an output in your program. I feel like you'd have to have that as an input in the program to accurately calculate everything else.
Thanks
I really like the idea of your string alignment calculator but the link to it on your website is broken. I have done quite a few string alignments before and setting up the strings parallel to the centerline is always the part that takes the longest, especially with an unknown track difference. If you don't mind, I would like to see the formulas used in your program so I can replicate it in Excel for personal use. I understand how you calculate the toe and toe angle, the thrust angle, and the angle between the chassis center line and strings, but it seems like all of these rely on having the strings already parallel with the the center line and equidistant side to side. It seems like you have track difference as an output in your program. I feel like you'd have to have that as an input in the program to accurately calculate everything else.
Thanks
Joined: May 2008
Posts: 369
Likes: 3
From: Central Ar.
This calculator originated on a Subaru forum iirc. A Google search found it for me a few years ago.
The only way I have found to make it work now is to copy the code (html? I'm not very smart at the computers) from the original post and paste it onto "notepad" in your accessories. Then open up the browser and click and drag it in. Something about the code is missing I believe as it doesn't sum the tow or calculate thrust but it does still display the tow for you.
You will also want to copy the pic from either Robs page or the original because the pic that pops up in the clicked and dragged code is the "x" that pops up when a pic doesn't load and this pic has the description of what each blank should be filled in with. Like I said, not smart at the computers...
The only way I have found to make it work now is to copy the code (html? I'm not very smart at the computers) from the original post and paste it onto "notepad" in your accessories. Then open up the browser and click and drag it in. Something about the code is missing I believe as it doesn't sum the tow or calculate thrust but it does still display the tow for you.
You will also want to copy the pic from either Robs page or the original because the pic that pops up in the clicked and dragged code is the "x" that pops up when a pic doesn't load and this pic has the description of what each blank should be filled in with. Like I said, not smart at the computers...
Joined: Aug 2011
Posts: 4,220
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From: Florida
rob's algorithm on his website
http://robrobinette.com/ConvertToeInchesToDegrees.htm
http://robrobinette.com/ConvertToeInchesToDegrees.htm
Code:
<script LANGUAGE="JavaScript">
<!--
function calculate() {
document.input.toe_angle.value=Math.atan((document.input.inch_toe.value) / (document.input.tire_diameter.value))*180/Math.PI;
document.input.single_toe_angle.value=(document.input.toe_angle.value/2)
}
//-->
</script>
Joined: May 2008
Posts: 369
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From: Central Ar.
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Joined: Apr 2012
Posts: 257
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Would there be any interest from the community for a step by step alignment program? The program would be capable of calculating camber, caster, and toe using simple methods like the strings, rulers, and levels. Of course, the accuracy of the results would only be limited by how meticulous the user is with their setup and measurements.
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Joined: Jan 2011
Posts: 1,342
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From: Race Track
I just use a trig calculator... http://www.carbidedepot.com/formulas-trigright.asp
Caster is a little tricky so some thing for that may be useful.
Caster is a little tricky so some thing for that may be useful.
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