Configurate Slave Axis

If you used the Stepconf Wizard to generate your configuration and your second drive is connected to separate pins on your parallel port just pick Y Step and Y Direction for the pins connected to your second motor.

If not tell us more about your setup.

John

fedemecanica wrote:

in my configuration i have 4 axis, each one in different pinsr

I am not clear from this reply if you have tried what JT suggested, or not?

But, if you wanted, you could set every pin on the parport to Y-step. It would be silly, but Stepconf allows it.
If the motors need to run in different directions, just swap the A-phase wires with each other.

fedemecanica wrote:

A axis, and Y axis, should run exactly the same way....
becuse it's a huge CNC that needs 2 steps motors, to run the same axis

It's not really an A axis, it's a second motor on the Y axis.
It is rather common for the two motors on a gantry to need to spin in opposite directions, as they tend to be mounted as mirror images of each other.

Pysiek wrote:

How do I slave the two motors together?

To _literally_ slave the two motors together, allocate Y-step and Y-dir to both sets of pins.

The complications arise when you want to auto-square to the limit switches, and if it is absolutely necessary to _never_ rack the gantry at all.
It then becomes really complicated if you have encoders with index, and horrible if the indexes are not aligned.
If we ever work out the perfect way to home a gantry then I think we will see it implemented as an automatic behaviour.