There is no exact answer to your question on using the motor mode...everyone does it slightly different. The principle of the mode is that it will put X volts out for Y seconds...whilst doing that it will measure the amps being drawn by the motor. For run in I normally use 3v 180sec...check that the brushes are fully seated after that....if not then continue with a second run. For powering a lathe you may want to use 4.5v etc......