No Input Signals

alfongs wrote: They are NPN proximity switches, so I'm going for the solution mentioned above.

It isn't entirely clear what you have done, but the Proximity switches are likely to need 24V (or at least 12V) to work.

So, you wire 24V to the Prox V+, wire the Prox 0V to the common BoB and 24V gnd. (no way to keep separate GND with this setup) then wire the prox output to the BoB input terminal.
You then need a connection (1k or so) from the BoB input terminal to +5V.

Rather than have the complexity of LinuxCNC to confuse matters, get the inputs working with the parallel port tester first:

wiki.linuxcnc.org/cgi-bin/wiki.pl?Parallel_Port_Tester

It isn't entirely clear what you have done

Maybe the drawing is unclear, I try to explain. The switches next to the pins (10-15) are except from the emergency switch just a placeholder (due to limited space on this drawing). The real cabling is shown below (with the caption Proximity sensor).

It isn't entirely clear what you have done, but the Proximity switches are likely to need 24V (or at least 12V) to work.

They have a range from 6V-36V. I'm downloading this tester and then hope to see the problem.

no way to keep separate GND with this setup

yes, my intention is to have one common gnd for all.

Where do I find my .ini and .hal files?

/home/<user-name>/linuxcnc/configs/<config-name>

Thanks to the paraport debug programme, problems with linuxcnc or my mobo paraport can be excluded.

: Still no Input signals, so I used a wire and connected pin 25 (gnd) sequentially with the input pins 10, 11, 12, 13, 15. And voila, it shows up in the programme!

That means something of my wiring is bad or the bob is not okay.

I also connected the pc gnd to the 24V power supply gnd.

See attachment for most recent version of my connections

You probably need a pull-up to your P15 terminal, but the first thing to do is to check the voltage at P15 with a multimeter.

You mean just p15? or all the Input pins there are (P10-15)?

Because I already soldered 2.2kohms pull ups to each pin, exactly as in this pic :

image missing http://linuxcnc.org/media/kunena/attachments/18514/asrock_q1900m_pro3_mod.JPG