| 摘要 |
A method for controlling an image forming apparatus including a head having a nozzle for discharging a liquid droplet; a sub-tank for temporarily storing the liquid supplied to the head; a main tank for storing the liquid; a pump capable of forwardly sending the liquid from the main tank to the sub-tank and reversely sending the liquid from the sub-tank to the main tank; and a sensor for sensing a pressure in the sub-tank is provided. In the method, before sending the liquid forwardly or reversely to achieve a target negative pressure in the sub-tank, a pressure sensing function of the sensor is checked by sending the liquid with the pressure in the sub-tank being at a negative pressure range in which a meniscus of the liquid is maintained. When the pressure sensing function is determined abnormal, a control is performed not to send the liquid by the pump.
|
