I have tried pulsing it with the parmon with no results. I understand what you are saying about the voltage not being a constant 5 volts, but I would expect it to be a bit higher than .02 increase, however I do have a scope so I will try that next. I spoke with motiontek the company I purchased the kit from and they are going to email me the mach3 settings for this kit. I am holding out hope that I screwed something up in the settings. Thanks again for all your help and ideas, with out this kind of forum support this hobby would be impossible.