I recently bought a new desktop to replace the old one that ran Mach 3 for my CNC machine. Because the new one doesn't have parallel ports I also bought a SmoothStepper to convert to USB and to also take some load of the computer. When I was using the older computer without the SS, I couldn't go above about 50 in/min without having it dive to deep or mess the carving up(this is the reason I decided to replace the computer and get a SS). So I got a new desktop and hooked up the SS and everything is running great, just the way it was before if not more smoothly, Except when I tried to cut a drawing out at more that 50 in/min(bumped it up to 70), it still messed up and ruined the carving partway through. I just don't know why I can't go higher than 50 in/min. I know its not in the process of generating the code with Meshcam(which I do on a separate $2000 desktop) cause it works with the same carving at lower feed rates. To me it seems like something can't keep up? I don't know, any suggestions or advice?