I can load the speed in real time?

Hi, guys.

I'm working on my project now. Right now I use PCI 7344, UMI-7764, AC/DC motor sevro, their amplifiers and the camera of the UAB.

I try to repair the braiding point machine to weave leadership x. usually the Plait point oscillates around a point in x direction.

At first, I need to get the position of the point using cam USB, I've done braiding. The positions I got the cam of the UAB is in real-time.

Then, I need your comments the position of the motion control loop. I intend to use the position to calculate the speed that responded to the questionnaire, which is real-time, too.

Engine going this speed. Thus, it is supposed to get that engine will decrease or increase depending on the weaving point moving.

I don't know if we can do it. I have yet found the relative position.

Anyway, thanks in advance. Any idea and the idea is really appreciated.

Guangli

Guangli,

as the camera of feedback is coming from a USB camera and with the during the calculations necessary to analyze the images, the behavior of your system in real-time is probably not very tight. Delays and jitter of the additional movement control operations are probably in the same order of magnitude as the delays and jitter, introduced by processing the image. If it's okay with you, can do the following:

  1. Load a maximum travel speed and acceleration/deceleration of the values for the axis
  2. With "Load Velocity override", you can pass the speed between 0 and 100%. Transitions of value axis a velocity to the adjacent spire to the value of the acceleration that you defined before.
  3. If you need change the direction of travel, you need to use 'Load speed' and 'Motion to start. " This operation is much longer that a speed of loading a substitute value, but in general you should not call this sequence too frequently.

I hope this helps.

Jochen Klier

National Instruments

Tags: NI Hardware

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