hello ive got 3 pci sci single stack steppers "pretty comon" im runing a xylon board in 1/8 micro stepping mode and motors are wired bi pollor parel,i have a p2 233 lap top running ezcnc,i didnt know about the x8 numbers for the micro stepping and had my 1/4-20 leads set at 4000 spi and every thing ran fast and good other then size issuse??but i could tranvers the axes fast,when i changed to 32000 spi the motor will ramp up and then stop and humm and as it ramps down start spinning again.if i ajst my feed rates way down i dont have this problem but ?i was able to work it when i had the wrong step count much faster,i tryed the steppers with no load ie disconnected so its not a torq isue,they still stop,could it be my computer cant keep up, or the magnetic flux is to hight at that rate, or?? do i just need to drop to 1/2 stepping mode to get my speed back?thx any help would be great