摘要:
A circuit for supplying pulses to a motor control for a stepping motor with the motor producing an incremental step for each pulse essentially at the frequency of the pulses supplied with the pulses being obtained from a fixed rate oscillator set at about the maximum tolerable rate of the system and with an adjustable delay setting the maximum tolerable pulse rate for each individual application or applications.
摘要:
A power circuit for supplying power to a DC energized variable speed stepping motor which for the higher speeds supplies essentially the same quantity of power as is used by the motor by supplying a variable width charge to a capacitor for each step taken by the motor with the capacitor charge being the voltage to the motor.
摘要:
A motor control circuit for accepting an input pulse and changing the energization of the windings of a stepping motor to produce an incremental movement. Each energization of a winding is delayed for a duration equal to the extent of the pulse which is adjustable to enable dissipation of energy in the winding being deenergized and to accommodate delay in semiconductor turn on and turn off times. The circuit includes gates and a pair of bistable means for directing the proper sequence of winding changes of energization.
摘要:
A system for providing a signal that a worktable is at a location when the worktable is driven along two coordinants by a pair of motors by concurrently sensing the actual worktable position and one rotational position of each motor. Relatively non-precise switch means are used for sensing the location of the worktable within an area that is less than the movement produced by one revolution while a shaft decoder connected to each motor senses the rotational position of the motor with simultaneous indications from the three sensing sources enabling the precise determination of the worktable position. The system may be used to prevent further automatic movement of the member when the motors are controlled by a numerical controlled system.
摘要:
A stepping motor having a minimum of eight stator poles formed with teeth and a rotor having teeth with the effective pitches of the teeth being different to provide a three-tooth differential between the teeth. Each stator pole has a winding, and the windings are connected into two distinct phases and energized according to a four-step sequence to simulate a twelve-pole motor to cause the rotor to move one-fourth of a rotor tooth pitch for each step of the sequence.
摘要:
A numerically controlled motor system which accepts digital information of a desired position in absolute coordinates and supplies a train of pulses corresponding to the number of steps required of a stepping motor to eliminate the difference between the desired position and the previous position with the stepping motor moving a step for each pulse. The acceleration and deceleration of the motor at the ends of its movement are controlled by initially feeding all the pulses into a counter and having only a fraction of the pulses of the train being directed to step the motor. After completion of the train, the counter is uncounted with only a complementary fraction of each change of count producing a motor step. The cessation of the train of pulses provides a signal of an intermediate point in the total movement of the motor which enables control over acceleration and deceleration of the motor by the count in the counter.