Uniform circular motion formula when the object submarge in acid?

[joy123]

hello friend, this is my first post please go easy on me. the best way i can express my problem is below.
I attach a pic to give you a better idea.
A is a circular disk with 4.5" diameter, DISK A is driven by C which is connected to a DC motor. B is a pin diameter of 1 mm which is going to rotate in a uniform circular motion when DC motor is on. an object will be on each pin(B) which is hollow in the middle like a cylinder.
if you can imagine everything i mention will be submerged to acid and i am trying to figure out what speed should i run the DC motor to keep the object always in-contact with pin B?

density of acid say =x
and density of object say =y

is there any other factor i should consider? is it possible to use a formula to find out the velocity of motor. please help its not a home work, its a part of a mechatronic project where physics has nothing to do but because i came into a position where i need to find out the right speed i need physics :(thank you very much for your help.

 

[Navin A S]

In order to determine the speed of the motor, you need to consider several factors. First, you need to know the density of the acid and the density of the object, as this will determine the buoyancy of the object and how quickly it moves up and down. You also need to consider the total weight of the object, which will affect the speed at which it moves, and the size of the pin, which will determine the speed at which it spins. Finally, you must consider the power of the motor and its torque, as these will determine how quickly the pin can move. Once all of these factors are taken into account, you should be able to use a formula to calculate the velocity of the motor.