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Trouble making leaf springs

michael.puckett
I'm trying to use the leaf spring generator in ADAMS to model a leaf spring I have in CAD and I can't seem to get the leaf spring to generate. I double checked with one of the standard ones included in the atruck database and that worked fine, so I'm thinking it has something to do with my variables. I'm not sure what the problem is though. I have picked points off my CAD model to put into the leaf plotting window and have measured the arc lengths that those points generate as well to make sure I'm not running into some kind of issue where the spring is too short or too long to fit between the frame hardpoints, but I'm running out of ideas on what to change. Pretty much everything but the leaf geometry itself I have set to match the sample atruck spring to try to eliminate something there as an option. Any ideas on what to check next? The error is just the vague "can't make python file" one, but I know it's not a permissions issue (like another thread on the forum here) as I can make a python file fine in that directory with the sample spring.
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    Okay, I managed to get a leaf to generate with my dimensions by building it up one leaf at a time, but I still have a few questions regarding some of the values in the leaf spring builder as the descriptions are a bit vague. The "reference marker to leafpack" description makes it sound like you need to put in a negative number if you have an overslung axle, but the sample leafspring included in the atruck package has a positive value here even though the leaf is overslung. The more complete description in the help file ("This is the vertical distance between reference marker (center of Axle) and leafpack surface (bottom of an overslung leaf or the top of the underslung leaf). This value is positive for Underslung LeafSpring and negative for Overslung LeafSpring.") again makes it sound like you are supposed to put in a negative value, but I'm wonder if selecting "overslung" in the axle mount type box just automatically treats this value as negative? I've tried putting both values in, but neither way seems to change the way the spring looks after regenerating.
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    Okay, I managed to get a leaf to generate with my dimensions by building it up one leaf at a time, but I still have a few questions regarding some of the values in the leaf spring builder as the descriptions are a bit vague. The "reference marker to leafpack" description makes it sound like you need to put in a negative number if you have an overslung axle, but the sample leafspring included in the atruck package has a positive value here even though the leaf is overslung. The more complete description in the help file ("This is the vertical distance between reference marker (center of Axle) and leafpack surface (bottom of an overslung leaf or the top of the underslung leaf). This value is positive for Underslung LeafSpring and negative for Overslung LeafSpring.") again makes it sound like you are supposed to put in a negative value, but I'm wonder if selecting "overslung" in the axle mount type box just automatically treats this value as negative? I've tried putting both values in, but neither way seems to change the way the spring looks after regenerating.
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