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Sure, I'll try and do this sometime tomorrow 

1. yes
2. yes
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Mesa 7i96S can have inputs set as active low or active high, so pretty much any sensor works.
LinuxCNC can use a single switch to do homing and both limits for any of the axis/joints.
Do download and read the Mesa manual while connecting sensors, it will save you a lot of time.

Please excuse the n00b questions as I work to setup my small AXYZ cnc router. Does anyone know how I should
implement limit switches in Linuxcnc? The factory wiring of my old millennium cnc router has a single blue tipped inductive proximity limit sensor on each axis. The sensors are located at the top of the z-axis, front of the y-axis and left on the x-axis. Each sensor has connections notated sig, 12v and ground. 

My assumption is that these are NPN, Normally Open (NO), but will confirm:

• Normal state (no metal detected): Sig wire outputs ~12V

Activated state (metal detected): Sig wire outputs ~0V

Two questions:
1) Will these play nicely with the 7i96s card I’ve ordered?
2) Are these be sufficient for homing the router? 
 

I would need a Bitfile for the 6i25, the 7i74 is on P3 and the 7i85 is on P2, if that possiple ?

[code]about the laptop/PC, try to reinstall the rio.c component:

[code]sudo halcompile --install riocore/files/rio.c

[/code][/code]


 

It worked, problem was on the hadrware side. Another USB Hub did the trick.