Do you have all automatic things turned off in your computer? If your computer tries to automatic update it's Microsoft OS or the anti virus tries to do something you will get hiccups in your signal to all of the axis's. Do you have the ferrite choke on your printer cable? In the manual there is something about setting your network adapter to a single speed and not allowing it to automatically pick a speed setting otherwise the drive motors will tick as they stop and restart during this searching.
BlueFin CNC LLC
Southern Oregon