Russell,
I'm not sure I completely understand your question. From what I can gather you are doing some image processing on some event and based upon the results of that processing you are sending a command to your motor to do some type of move. The problem is that your motion commands are not executing in the the manner you would like (ie timing problems). Is ths a correct assessment of the problem?
A few other questions:
1. Are you using the National Instruments drivers for Vision and Motion?
2.What are the software versions you are using?
3. What type of image processing are you doing?
4. What type of move are you having your motor perform?
5. What specific VIs are you using to send the commands to the motor?
6. What is the "non-queue mode" you are referring to?
6. What are your timing constraints?
Thanks,
S. Arves S.
National Instruments
Applications Engineer