need to build a low-cost carousel... pls suggest...

[willydally]

I am looking to build a carousel-like structure, on which i intend to place beakers(approx 6)... I need to design this structure in such a way that I should be able to control the rotation of this carousel by accurate amounts. I am quite certain this would involve a stepper motor but am not sure of the size, i would require for this.. Can you please suggest a way I can implement this structure ..In case you are unable to follow my description, pls follow the link below for a pic..
https://www.chemicals-technology.com/contractor_images/nima/image_5.jpg

 

[MRW]

We had a dispensing machine that used an rotary encoder to give the PLC its position. The plc sent a signal to a simple VFD driving a 3 ph. gearmotor with a chain drive. It was very simple and durable.