blending Moves with NI Motion

[wade75]

I have a question involving NI-Motion Blending Moves Option.   Does using this feature inherently remove any sort of delay between multiple steps?  For example If I configure a rotory servo motor to move from 0 to 5000 counts for my first step then to -5000 counts for step two and back to 0 counts for step three to create a sine wave will there be any delay between steps?  Will it actually be a smooth played out waveform?  I have an application that needs to be built that requires movement of four seperate rotory axis to move indepentantly of one another in a +- sinewave motion for X amout of Cycles.

Regards,

[A_Person]

The default blending option removes delay between multiple moves.  It is done by starting the acceleration of the next move when the current move begins to decelerate.  Other blending options have different outputs that are decently well covered in the LabVIEW help.

If you are looking to create sinusoidal motion for your axes, check out one-axis contouring.  There is an example in the LabVIEW Example Finder called One-Axis Contour Move with Position Monitor under Hardware Input and Output»Motion Control»Contour Move.  It produces an array of points for a sine wave that you can pass to the motion controller.  You can basically copy the VI to the other axes to get sinusoidal motion on all four.

Check out the example and let us know if you have any further questions.

Message Edited by A Person on 05-21-2009 04:02 PM

[S_AVILA]

Hello,

I'm using a NI 7342 PCI card to control a Servo Motor.

We want to generate sine waves of position in one dimension.

I've implemented the contour motion in MOTION ASSISTANT but the spline made between two points makes the sine wave not swooth enought (the motions stops too long during the change of direction).

I've copied the screen shoots of the sines we want to have with 2 samples and 14 samples (maximum allowed).

The frequency and amplitude of the motion are: 

3Hz for 5cm 

and

10Hz for 3cm.

Do you have any indications on how to make a smooth sinewave?

Thank you very much.

Best Regards,

Sébastien AVILA

Ingénieur d’applications

R&D VISION

64, rue Bourdignon

94100 St Maur des Fossés

     Tel. :      +33(0) 1.76.62.11.50

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E-mail : sebastien.avila@rd-vision.com

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