Have you checked to see what you have the scanners set at in QS?
I'm guessing you probably have as its next to the test patterns but just in case you haven't or you may have caught it accidentally:
In the Settings Dialogue > Projector Settings you can set the scan speed in the software > Scan Rate tab. If you haven't checked, it's possible you could have that slider set at less than 30K. In QS its limited to 30K so the slider should be to the far right as far as it will go. Also, re-check your scan angle calculation as only a few degrees over will play havoc with your scanners ability to draw the pattern.