Image Forming Apparatus and Image Forming Method
Provided is an image forming apparatus which, even after the print speed thereof has been switched, correctly determines the necessity for cleaning of corona wire. When printing, the image forming apparatus (20) determines, on the basis of a threshold voltage based on a print speed in the printing, whether or not corona wire (221) of a charger (22) needs to be cleaned. On the basis of whether or not a monitoring voltage corresponding to the current value of a charged bias, which is applied to the corona wire (221) by a charged-bias application high-voltage power supply (222), is greater than or equal to the predetermined threshold voltage based on the print speed in the printing, the image forming apparatus (20) determines whether or not the corona wire (221) needs to be cleaned.
SASAI TAKAHIRO [JP]; SUZUKI YUJI [JP]; TARUNO YOSHITAKA [JP]
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