Plotting ellipse, parabola, hyperbola using value motion PCI-7324

[Himanshu]

I am attempting to plot closed curve using two axis of stepper motor.I have been sucessfull in plotting an ellipse. I would like to point out that value motion boards have limitation of 1D motion. However I have been sucessfull in plotting an ellipse.I generated points using the mathematical equation of an ellipse and then I fed those points to the two motors seperately so that they move at different velocities, resulting in an ellipse. I need some fresh ideas by which the task of plotting an ellipse etc can be accomplished. Please take care that the hardware I am using is stepper motor control board value motion.

[Brent_R]

The method you are using is probably the best that is possible with the Valuemotion board.

You could achieve much better results with the NI 7344 Motion Controller. The 7344 provides a contouring mode that is ideal for generating user defined curves (ellipse, hyperbola, parabola, random, etc). The contouring function allows you to specify an array position points in your curve. Using one start command, the board will then command the motors to move through these positions at regular time intervals (ex. 10ms). The board will also generate a spline curve connecting each of the target positions, which provides very smooth and precise motion. I would highly recommend the 7344 for this type of applicatio
n.

Regards,

Brent Runnels
Applications Engineer
National Instruments