This application calculates and animates the motion of the Non-Sync centrifuge.
At the Brunel Institute for Bioengineering we have developed a Non-Synchronous CCC machine where the rotational speed of the bobbin (containing the coil) and rotor can be adjusted independently. Doing this mixing and settling inside the coil can be changed independently which might be required for certain applications.
This application was developed to enable anyone to understand the Non-Synchronous motion. The blue line shows the path of the rotor. The green line shows the coil at a particular diameter. The path of one point on the coil at that diameter (also called the locus) is shown in the red line.
The Beta-value (B) of a coil is defined as the diameter of the coil (r) in the bobbin over the diameter of the rotor (R). This Beta-value can be changed to see how different coil diameters affect the path of one point on the coil.
Changing the ratio of the bobbin to rotor speed (Pr) shows the different paths that can be achieved with the Non-Synchronous centrifuge. When Pr = 1 the machine behaves as a J-type centrifuge which this is most common type of centrifuge. When the Pr = -1 the machine behaves as an I-type centrifuge which is a centrifuge with a belt drive. When Pr = 2 the bobbin rotates twice for every rotor rotation which gives more mixing and faster settling compared to the J-type. When Pr = 0.5 the bobbin rotates once for two rotor rotations which gives more settling and faster mixing compared to the J-type.
Please try the application by entering different values for Pr (from -5.0 to 5.0) and B (from 0 to 1) and press the button to calculate and animate the result.