I purchaced and 3 axis stepper motor/driver kit from Probotix. The manual says to use fuses but it does not say what size. The motors are 3 amps per phase, with a voltage range of 12-48 volts. The power supply is a 24 volt 4.3 amp switching power supply. Can anyone give me advise on what size fuses to use?

I used 2 amp fast blo's if I remember correctly.

I have pics of my probotix setups here, down under the computer section
http://www.el34world.com/Misc/Cnc/CNC0.htm