comparing the actual stage velocity against {HEAD ~ a pre set stage velocity limit} above which {TAIL ~ continuous transfer} of the pattern portions is impossible, and against a pre set specified stage velocity less than but near the stage velocity limit 
comparing the actual stage velocity against { HEAD ~ a pre set stage velocity limit } above which { TAIL ~ continuous transfer } of the pattern portions is impossible , and against a pre set specified stage velocity less than but near the stage velocity limit
OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH