Would something like this work? I have used them for torsion mounts and the return pretty accurately. Look at the DR-S & DR-A type. http://www.rostainc.com/PDFs/KAP02_EN.PDF
The only thing is the torque increases with angular movement.
Al.
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CNC, Mechatronics Integration and Machine Design.
“Logic will get you from A to B. Imagination will take you everywhere.”
Albert E. |