Da Vinci 1.0 Movement issue

Unfortunately I believe that all da vinci 1.0 printers, at least speaking for mine, are actually quite loud. Mine in fact can get really load when it is moving fast and far in one direction (as in homing the printer). And yes sometimes on axis is loader than another. It is just how to printer is designed. If you like there are various solution like a recent post that shows how to use ninjaflex to print rubber pads  between the frame and the stepper motors or just try plastic spacers on the outside (http://www.thingiverse.com/thing:407970) if you want to try. So unless your printer is extremely noisy it is most likely nothing

You can also try jogging the print head at different speeds with manual gcode commands (eg. G1 X200 F4000 - where 4000 is the speed in mm/min) and see which speeds result in more noisy traveling. On my printer, values around 3600-3900 in the X axis tend to be really loud, so I've configured the slicer to do travel moves always at higher values. It does make a difference.

Oh, I kinda assumed you were running Repetier firmware, which makes it trivial. If not then you could manually edit a gcode file with some test commands and then feed it to XYZWare... but I remember you needed to do some bas64 encoding and other stuff to get it to take it. I only ever used XYZWare for a few days before making the switch to Repetier.