Hydraulic chuck on lathe

hi,

Can i use Linuxcnc to opperate a hydraulic chusk and how do i connect it and with witch signals?

Thanks in advance

Yes, and one (of many) ways to do it is in the user-defined M-code section:

linuxcnc.org/docs/2.7/html/gcode/m-code.html#mcode:m100-m199

Yes oke, but how do i know witch valve and witch sensor and witch contact i have to connect to my 7i77 board.

Do you have any documentation for the machine?

Thats the problem i don't. it's a machine bought without any documentation so i have to search everything.

But there are two inductive sensors.
one directional control valve.
and two pressure switches.

If you prefere some picture let me know

I think the first thing to do is to experiment with a physical switch and see what it takes to operate the hardware before trying to run it from software.