disc will rotate between fixed angles 90degree, 180 degree, 540degree, 360 degree
once we set a angle 90 degree, disc will rotate between this 90degree,
similarly , i need for rotattion 540, 720 degree without up and down movement of disc...
any locking mechaninism below disc in platform is preferable...
any suggestion , any mechanism is welcome..
please share your knowledge..
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