Could you post your data here？ Is there any error message in the extended window of design dialogue?
Without considering calculation results, I tried and got the result if the parameters were suitable.
I got it eventually, by using suitable parameters.
I notice that using design accelerator you cannot (or not that I could see anyway) draw the spring in its free position (ie fully closed)
I therefore also drew it in ipt using conventional methods
I did notice that I had to use a pitch of 2.01mm (slightly more than 2mm) to prevent self intersection of solid bodies.
Also I was able to draw the hook ends a bit better than they come out in design accelerator. Also, In accelerator the hook ends always come out parallel to each other.
However I am not sure what the practical reason is for not having them parallel to each other (as I have drawn in spring 01 .ipt)
However all being said and done, I don't know how the springs are actually manufactured and what a manufacturer would need to know. I am assuming the tension spring would be fully closed ( ie as I have modelled it without the design accelerator in spring01.ipt) when it is not under load.
I think I will speak to the spring manufacturer tomorrow to ask him a few of what his required parameters are
PS I can't add all my attachments - they are too big combined even when I zip, Therefore I will only add one+ 2jpegs
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