Stepper Motors

I don't know how large your stepper motors are, but there is a great 3-axis stepper board at

For $125 you get a fully assembled board that does full-half-quarter-eighth-microstepping and current up to

2.5A per phase, and a cable to connect directly to a computer parallel port.

Then you can use TurboCNC from

which will let you set up your motors and make synchronized moves. If you are building a CNC machine, so much the better. If you make custom software, it only needs to output a step and direction signal per motor through the parallel port.

Also do a search for "linistepper", since your motors have six wires you might be able to cut off the connector and use them as unipolar motors. The Linistepper comes as a kit, you can buy three of them for $75 total. Needs a good heat sink, handles around 2 amp motors. It does analog microstepping up to sixths, and PWM microstepping up to eighteenths.

I've personally used everything I recommended above, and all worked well.