by the way if it is 500 lines
500 * 4 =2000 points
400 rpm revolution per minutes make
400/60 =6.666666666 revolutions per second
so 6.66666666etc* 2000 =13333 signals per second or 13.33khz
this look like a software limit
if you use m=4 can you go at 1600 rpm ?
if yes you reach the limit of your software not the limit of uhu |