What most people do, is set the drive current to match the motors rated current.
But based on that info from Lin, you can actually set your drive current to 1.4x the rated current. This assumes that the chinese motors your buying are rated the same way as Lin's motors. Setting the current too high can damage the motors.
No. According to Gecko, you only need a 4 amp power supply, when the drive is set to 6 amps.So according to linengineering, if I have a motor with 6 amps/phase, I need a driver capable of 6 x 1.41 = 8.46 Amps, but according to gecko, I need a driver capable of only 4 Amps?
As I said, just about everyone sets the drive current to match the motor, or slightly less, Since most motors will have a max current of 6-7 amps, the G201X will work fine with them.