Switch relay in a defined x position

Oops I was totally wrong above. There is no need to copy the file to any special location

For a rip build type this in the folder the comp file is in
halcompile --install downdraft.comp

For a deb install add sudo to the command above.
sudo halcompile --install downdraft.comp

See  linuxcnc.org/docs/devel/html/hal/comp.html


You can change the file name but you also need to edit the first line in the file to use the new file name

Isn't this something that the built-on "comp" or "wcomp" components can do?

linuxcnc.org/docs/2.8/html/man/man9/comp.9.html
linuxcnc.org/docs/2.8/html/man/man9/wcomp.9.html

andypugh wrote:

Isn't this something that the built-on "comp" or "wcomp" components can do?

linuxcnc.org/docs/2.8/html/man/man9/comp.9.html
linuxcnc.org/docs/2.8/html/man/man9/wcomp.9.html

No wonder I wrote a component. The documentation there is truly awful. UNnless you have an electronics major you have no  clue what a comparator is.

I have now managed to do this with the Halcompile. As an answer I got:

compiling realtime downdraft.c
Linking downdraft.so
cp downdraft.so /usr/lib/linuxcnc/modules/

I have also added the lines in the Hal file.

Now when I start Linuxcnc I get this error message:
HAL-ERROR: function downdraft not found!

What or where is the wrong?

mgm wrote:

What or where is the wrong?

Are you running an installed version of LinuxCNC or one you compiled yourself? 
 

I first installed linux MX and then Linuxcnc following the instructions here in the forum