초록 ▼

A stepping motor control circuit permitting selective operation of the motor in various modes such as half or full step mode. The circuit includes a pulse generator producing pulses at a selected motor step rate. A switch means selects the step size while a second switch selects the motor direction.

A stepping motor control circuit permitting selective operation of the motor in various modes such as half or full step mode. The circuit includes a pulse generator producing pulses at a selected motor step rate. A switch means selects the step size while a second switch selects the motor direction. An up/down counter counts pulses from the pulse generator in a direction correlated with the selected rotation direction. A read-only-memory is addressed as a function of the periodically repeating count in the up/down counter and the selected step size. The stored information at the addressed read-only-memory location actuates motor drive circuitry which generates energizing signals for the motor windings to drive the motor in the selected direction a distance corresponding to the selected step size at a step rate equal to the pulse rate of the pulse generator.

대표청구항 ▼

A stepping motor control circuit for selectively controlling the size of each step of a controlled stepping motor with a plurality of windings comprising, in combination: means selectively operable to produce step size indicating signals; means to produce periodically repeating address signals where

A stepping motor control circuit for selectively controlling the size of each step of a controlled stepping motor with a plurality of windings comprising, in combination: means selectively operable to produce step size indicating signals; means to produce periodically repeating address signals where the signals change at the desired motor step rate; read-only-memory means for storing predefined data which is changeable to suit the desired operation for the stepping motor at each of a plurality of addressable locations, said read-only-memory means being responsive to said step size indicating signals and said address signals to place the predefined data stored at the address defined by said step size indicating signals and said address signals onto the memory output terminals; motor drive circuit means responsive to the predefined data at said memory output terminals to energize the motor windings specified by said data at said output terminals thus causing the motor to turn by a step whose size is indicated by the step size indicating signals.