could someone give me a bit of advice on stepper motors and drivers, i have built a cnc router and i bought a complete kit of steppers and drivers plus power supply off e bay, but the motors are not strong enough, if i attempt to run them any quicker than a snails pace they dont like it,and growl, the driver board is a 1 axis simplestep (aliencnc.com) and it says maximum 30vdc@2.5 amps/phase motor output, for use with stepper motors rated at 2.0 amps/ phase or higher. the power supply is 24vdc@4.5 amp switching power. can anyone tell me the strongest stepper motor that will run with these boards, the motors i am using now are FL57STH76-2808B ones, or do i need to buy a more powerful motor and driver/power supply.
many thanks drut