Patent ID: 9257927
Filing Date: 2016-02-09
CPC Classification: H02P

Claim Text:
1. An apparatus for controlling a stepping motor, the apparatus comprising: a temperature measuring unit for measuring a temperature; a storage unit for storing temperature driving values of the stepping motor in correspondence with temperatures, storing a plurality of regions of a range of motion of the stepping motor, and storing a respective divided-region driving value for each of the plurality of regions, said divided-region driving values being different for different said regions; and a digital signal processor (DSP) for determining a measured temperature driving value by searching the storage unit and selecting a divided-region value corresponding to a respective one of the plurality of regions of the stepping motor in correspondence with the measured temperature, changing the determined driving value based on an absolute position of a target position to which the stepping motor is supposed to move, outputting the changed driving value to the stepping motor; and changing a shape of a driving pulse of the stepping motor based on the changed driving value.