How to use AC motor with axis?

Hello to all,

I need to control AC motor direction with any axes.

So I need separate signals, one for forward and one for reverse. Or one for started to move and one for direction...

Is it possible with linuxcnc?

you can use the standard stepper DIR Signal

with a AC Motor control

but what are you controlling

Yes you are true but for direction signal. I need one more signal to run motor.
I will run 3phase ac motor....
For relays I need to signal, forward and reverse or enable and direction. Both can be acceptable....

For what do you intend to use that motor ? For spindle it is easy to set up in Linuxcnc. For other types of movement you can use digital outputs from Linuxcnc wired to external relays that will turn on or off or switch direction, also easy in Linuxcnc.

Have a look at the extra outputs from the HAL "abs" funtion.

linuxcnc.org/docs/2.7/html/man/man9/abs.9.html
is-positive and is-negative.

In practice you might want some deadband, so wcomp might be better (with the window around zero and using the under and over bits)
linuxcnc.org/docs/2.7/html/man/man9/wcomp.9.html

All the Signals you requirer are available by hal and also for Components you may make your own by HALUI

See a standard Stepper basic configuration