Component mounting machine

1. A component mounting machine which releases a component by supplying positive pressure from a positive pressure source to a suction nozzle that sucks a component by negative pressure, the component mounting machine comprising:

an electropneumatic proportional valve which adjusts the positive pressure supplied to the suction nozzle from the positive pressure source;

an electromagnetic valve which opens and closes a positive pressure supply path between the electropneumatic proportional valve and the suction nozzle;

a control device configured to control a positive pressure adjustment operation of the electropneumatic proportional valve and an opening/closing operation of the electromagnetic valve; and

a pressure sensor which detects the positive pressure supplied to the suction nozzle through the positive pressure supply path from the electropneumatic proportional valve when opening the electromagnetic valve,

wherein the control device adjusts output positive pressure of the electropneumatic proportional valve to a positive pressure to release the component from the suction nozzle and the control device determines that the component is released from the suction nozzle when the pressure sensor detects that the pressure in the positive pressure supply path is less than a predetermined value, and

wherein the control device determines that the release of the component from the suction nozzle has failed when the pressure sensor detects that the pressure in the positive pressure supply path is greater than or equal to the predetermined value after the electropneumatic proportional valve is adjusted to the positive pressure.

2. The component mounting machine according to claim 1 ,

wherein a positive pressure command value which is appropriate for releasing the component is registered in component data including data for image processing to be used when an image of the component suctioned to the suction nozzle is processed, and

wherein the control device obtains the positive pressure command value to be used in releasing the component suctioned to the suction nozzle, and adjusts the output positive pressure of the electropneumatic proportional valve by outputting the positive pressure command value to the electropneumatic proportional valve, with reference to the component data.

3. The component mounting machine according to claim 2 , wherein, comparing the positive pressure detected by the pressure sensor with the positive pressure command value when supplying the positive pressure to the suction nozzle, the control device corrects the positive pressure command value in accordance with the comparison result.

4. The component mounting machine according to claim 1 ,

wherein the predetermined value is a pressure between the positive pressure supplied from the positive pressure source and atmosphere pressure.