A micro gear system, operating according to the principle of a strain wave gear system, a Wolfrom gear system, or a similar planetary gear system comprises at least one sun wheel and at least two planet wheels meshing with the sun wheel. The inventive methods comprise eluting the HPLC column using an aqueous mobile phase comprising at least one fluorinated additive. A rinsing device is positioned below the steam cleaning device for rinsing the sand with water. The serial protocol defines a serial data word transfer to comprise a number of reserved clock cycles that are not assigned for communicating a data bit value of the data word. The second circuit board has a plurality of second circuit board traces. The absolute length of each cable is determined during initialization by retracting each cable In turn to a zero length position.