Thanks for the reply. I have exactly machine like in the video, this garman machine truing, radonaut-siemens. I have a dishing tools from park tool, when i use the dishing tool, the wheel is perfect centered, but when i put the wheel in the machine, tells me cuz is a little offset. Of course the machine is wrong. I need to offset wheel at 0 somehow and after truing the wheel, cuz i can't triung the wheel if it's offset on the screen. When it's centered on the machine it's not centered on dish tools or on bike. I hope you understand me. Sorry for my english. I know it's bad. Thank you very much.