| 摘要 |
PURPOSE:To improve the reliability of an apparatus by constituting a titled apparatus in such a manner that a sample sucking needle is returned to a home position and a sucking action is carried out again when the sample sucking needle fails to be correctly inserted into a sample bottle, etc. CONSTITUTION:Pulse motors 4X-4Z are driven respectively by the assigned numbers of pulses by a microcomputer system 58 and pulse motor driving circuits 6X-6Z in the case of executing sample injection. The sample sucking needle 2 comes into contact with the cap of the sample bottle when the needle 2 fails to be correctly lowered into the sample bottle. Then, a spring 22 shrinks and an actuator 26 enters the inside of a sensor 24, thereby turning on the sensor 24. The needle 2 is returned upward in this case. Said needle is returned to the home position in X- and Y-directions as well. The numbers of the pulses applied to the motors 4X, 4Y before the home position sensors 10X, 10Y operate are measured. The measured number of the pulses and the number of the pulses applied previously to the motors 4X, 4Y are compared and the pulse rates to be applied to the motors 4X, 4Y are decreased. The injection action is thus carried out again. |
