Geometrical instruments – Scriber
Patent
1987-08-27
1988-10-11
Haroian, Harry N.
Geometrical instruments
Scriber
346139C, 33 1M, B43L 1300
Patent
active
047760974
ABSTRACT:
In a graphics plotter having motor control logic for controlling a motor employed in the process of drawing a series of vector lines comprising a plot, an improvement to the logic for applying optimum control of the motor. The length of each next vector to be drawn is first calculated. The logic for controlling the motor is then self-adjusting as a function of whether the next vector line to be drawn is a short-length vector less than a pre-established length or a long-length vector longer than said pre-established length. In particular, the invention is employed in a graphics plotter having a motor for driving a penholding apparatus along an axis and a motor controller for accelerating and driving the motor to draw a series of vector lines and the aforesaid method is employed to apply optimum acceleration to the motor and comprises the steps of calculating the length of the next vector to be drawn and applying a step acceleration to the motor to draw short-length vectors less than a pre-established length and applying a ramp acceleration to the motor to draw vectors longer than said pre-established length.
REFERENCES:
patent: 3500154 (1970-03-01), Arp et al.
patent: 4070680 (1978-01-01), Shelley
patent: 4540994 (1985-09-01), Lawrence
Haroian Harry N.
Porter, Jr. Wm. F.
Sanders Associates Inc.
Streck Donald A.
LandOfFree
Dual mode acceleration control for a plotter does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Dual mode acceleration control for a plotter, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Dual mode acceleration control for a plotter will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1950121