| 摘要 |
An image forming apparatus includes a stepping motor that drives a rotor by rotating in accordance with an input of a drive pulse, a drive pulse profile storage portion that stores the drive pulse profiles corresponding to temporal changes of the drive pulse inputted in the stepping motor at starting, the drive pulse profile storage portion storing at least a first load profile corresponding to the first drive pulse profile for a first load driving the rotor and a second load profile corresponding to the second drive pulse profile for a second load driving the rotor, which is larger than the first load and a profile setting portion that sets the drive pulse profile in accordance with the load for driving the rotor, as the drive pulse profile of pulses inputted into the stepping motor, among the drive pulse profiles stored in the drive pulse profile storage portion.
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