Ive been found out that i need i fast control interface i.e like smoothstepper but as a few of you know this has its own problems. or should i say bug. but having looked at the board i mentioned at the start of the post it appear that this board drives servos ok and via to parallel ports, im unsure about it tho. having found out that your standard LPT has a max of 100khz and i need 500khz to achieve 3000rpm. can any of you boffins see if and how this IO6 board can control servos properly.