Presettable number to step motor control system
First Claim
1. A system for accepting a number and causing a stepping motor to produce a movement having the same number of steps comprising a stepping motor means for producing a step essentially simultaneously with the receipt of a command pulse, variable rate oscillator means for producing command pulses, counter means for maintaining a count of the number of steps to be produced, means for directing the oscillator means to increase the rate of the command pulses at the beginning portion of the movement and means for directing the oscillator means to decrease the rate of the command pulses at the ending portion of the movement in accordance with essentially the square root of the count whereby the motor speed decreases essentially linearly.
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Accused Products
Abstract
A system for accepting a number and causing the same number of steps to be produced by a stepping motor with the motor essentially linearly accelerating to a settable maximum velocity and then linearly decelerating in small velocity changes to the end of the movement with the deceleration duration being inversely related to the maximum velocity.
13 Citations
12 Claims
- 1. A system for accepting a number and causing a stepping motor to produce a movement having the same number of steps comprising a stepping motor means for producing a step essentially simultaneously with the receipt of a command pulse, variable rate oscillator means for producing command pulses, counter means for maintaining a count of the number of steps to be produced, means for directing the oscillator means to increase the rate of the command pulses at the beginning portion of the movement and means for directing the oscillator means to decrease the rate of the command pulses at the ending portion of the movement in accordance with essentially the square root of the count whereby the motor speed decreases essentially linearly.
Specification