multiple NXTs

[ythunder]

I don't understand. I use 6 motor control to control 3 robot. Which motor controls unneccesary and have to delete?

[garrett8357]

these ones are unnecessary and breaking the VI

[ythunder]

You say that I can't steering robots this method. If I use one, the robot can run straight.

Can I use the attached method to steering, and will operate my program?

[garrett8357]

Which LEGO MINDSTORMS brick are those VIs supposed to be running on? You need to wire an NXT/EV3 wire into the first one if you want them to work.

[ythunder]

If i understand the problem, I can not use two Motor control one after the other to steering.

Could you tell me if I change motor controls in my program to the attached method can my program work?

This is my thesis, and its very important for me, to work properly.

[garrett8357]

Sorry if I wasn't clear.

You CAN use two motor controls one after the other to steer.

But if you are using the Specify NXT/EV3 VI, you can't have VIs floating on your block diagram with no NXT/EV3 input.You must wire the NXT/EV3 wire to any VIs which are intended to be run on that NXT/EV3. Otherwise, how will it know which NXT/EV3 to use?

Just delete those two, which aren't necessary for your program anyway, and keep the 6 in the image you sent.

[ythunder]

Sorry, I was careless. I scroll my program right and I see what you say. I delete them from my program.

This was the problem? My program can be work for now?

[garrett8357]

I think it will. Test it out and let me know if you are still experiencing issues.

[ythunder]

THANK YOU VERY MUCH ALL YOUR HELP!!!

If it will work you save my life 🙂

[ythunder]

Hello garrett8357!

You were right, my program run succefully! Thank you very much your help!

I have a small problem. When I run the program I get changing delay (0-1sec), after I give a command.

I read about this problem from your webpage:

http://zone.ni.com/reference/en-XX/help/372962A-01/lvnxt/directmode/

Note:  Timing of loops in Direct mode is not always perfect.

Have you any idea how can I get constant delay or a synchronization method?

Thanks