Digital Output from linuxCNC to drive toolchanger

Hello Everybody,

I have a Hurco MAchine Center with a 12 tool carousel.

I have retrofitted the system with LinuxCNC, and would like to use the toolchanger.

The toolchanger has four proximity switches that are used to determine the tool position on the carousel.

At each tool position the system would monitor whether each of the four proximity switches is on or off. A sort of binary table is created.

I am guessing
switch 1 can be either 0 or 1
switch 2 can be either 0 or 2
switch 4 can be either 0 or 4
switch 4 can be either 0 or 8

With this table I can get 16 positions, the carousel however has only 12.

I was wondering if there was a digital output from LinuxCNC that could indicate the tool required to change at some point in the G Code program.

Using this table, and possibly Classic LAdder or a small plc, it would be easy to change to the required tool, once I know that tool position is required.

Is this possible ?

Thank you in advance

take a look at the orac toolchanger comp in the wiki it will show you one way how to do it . far simpler than a plc or classic ladder