초록 ▼

A drive control system for a stepping motor which stores values for the current driving each phase of the motor in data tables. A central processing unit drives the motor in accordance with the current values stored in the data tables. The current values are stored in the data table with correspondi

A drive control system for a stepping motor which stores values for the current driving each phase of the motor in data tables. A central processing unit drives the motor in accordance with the current values stored in the data tables. The current values are stored in the data table with corresponding addresses. The current values are read out sequentially from the addresses in the data tables. Each time the address is incremented by 1, the magnitude of the angle of rotation of the motor is set so that it is always the same.

대표청구항 ▼

A drive control system for stepping motors, comprising: a stepping motor including a plurality of phases adapted to receive an excitation current to drive said motor, said stepping motor adapted to operate in a micro stepping mode in which each phase is excited simultaneously with an excitation curr

A drive control system for stepping motors, comprising: a stepping motor including a plurality of phases adapted to receive an excitation current to drive said motor, said stepping motor adapted to operate in a micro stepping mode in which each phase is excited simultaneously with an excitation current within the range of a step; a plurality of drivers adapted to supply the excitation current to each of said phases; and control means for controlling the excitation current supplied to said plurality of drivers, said control means having a data table in which a ratio of the excitation current values of the phases at each step is stored, and in which the values of the excitation current flowing in each phase of the motor and their corresponding addresses are stored, said stepping motor being stepwise driven through a rotation angle by an excitation current having a current value is read out of the data table which corresponds to an address, associated with the read out excitation current value stored in the address data table, which is incremented, wherein the data table values are set such that the magnitude of the rotation angle of said motor is always the same each time an address in the data tables is incremented by 1, wherein the number of addresses from the address at which the excitation current value of one of the phases is at a peak and the excitation current value of another of the phases is zero to the address at which the excitation current values for the one of the phases and the another of the phases are equal, is different from the number of addresses from the address at which the excitation current values of the one of the phases and the another of the phases are equal to the address at which the excitation current value of the one of the phases is zero and the excitation current value of the another of the phases is at a peak.