Driving apparatus for analyzing apparatus

1. A driving apparatus for an analyzing apparatus comprising a rotational drive section having a first drive part for rotating a set analyzing device, a second drive part selectively engaged with the first drive part to reciprocate the analyzing device, and a third drive part for relatively moving the first drive part and the second drive part to a position where the first and second drive parts are engaged with each other and a position where the first and second drive parts are not engaged with each other,

the driving apparatus further comprising:

a swinging frequency detector configured to detect a swinging frequency of the first drive part;

a controller configured to output a set voltage value to the second drive part, the set voltage value being necessary for swinging the analyzing device; and

memory configured to store a table that expresses a relationship between the set voltage value and the swinging frequency,

wherein the controller is configured to run a learning routine, the learning routine comprising:

reading the table stored in the memory;

outputting a set voltage value to the second drive part;

reading a detected value of the swinging frequency that is detected by the swinging frequency detector, and

updating the table so as to reduce difference between the detected value and a corresponding value of the swinging frequency that corresponds to the set voltage value in the table before updated,

wherein the updating process in the learning routine includes:

determining a shift amount of swinging frequency based on a difference between the detected value and the corresponding value of the swinging frequency;

calculating a voltage adjustment based on the set voltage value, the shift amount of swing frequency and a relationship between the set voltage value and the corresponding value of the swinging frequency in the table; and

rewriting the set voltage value in the table based on the voltage adjustment such that a further detected value corresponding to the updated set voltage value comes closer to the corresponding value of the swing frequency.

2. The driving apparatus for the analyzing apparatus according to claim 1 , wherein the controller is configured to run an accumulated swinging value deciding routine, the accumulated swinging value deciding routine comprising:

accumulating count values corresponding to contents of a swinging operation to an accumulated value in a resister;

running the learning routine when the controller detects that the accumulated value has exceeded a threshold value; and

resetting the accumulated value when the learning routine has been completed.

3. The driving apparatus for the analyzing apparatus according to claim 1 , wherein the controller is configured to run an accumulated swinging value deciding routine, the accumulated swinging value deciding routine comprising:

accumulating count values corresponding to contents of a swinging operation and the secular changes to an accumulated value in a resister,

running the learning routine when the controller detects that the accumulated value has exceeded a threshold value; and

resetting the accumulated value when the learning routine has been completed.

4. The driving apparatus for the analyzing apparatus according to claim 1 , wherein the first drive part contains a hole sensor, and the swinging frequency detector is configured to detect the swinging frequency of the first drive part based on voltage fluctuations of a detected output of the hole sensor.