Control Schematic Advice

[assadi]

Hello,
I'm new to CNC machine, I need your help. I have difficult in understanding the limit switch and the homing switch. I prefer to seprate the homing from limiting, i have 6 limit switch and 6 inductive proximity switch, I was planning to use the 6 limit switch for limiting (2 on each axis) and use 3 of the 6 inductive switch (one on each axis) and one inductive on x' axis for auto squaring (dual drive x axis), my problem is where to connect the limit & inductive switch on the Pmdx-126 ?! On which port?! Does I need relay ?!
Appreciate your help.
Murad

[ngundtoft]

Hi GTJim. I have been looking at the very nice wiring diagrams you have made for your router. I have actually based my diagrams on your drawings, since we have very similar setups, and I did not know so much about safety relays.
I noticed that you use a separate time delay relay for the power supply (1 to 10s). But this is not really required. The Pilz PNOZ X9 safety relay has an on-delay of approx. 200ms (manual reset) which is fine for this use. 1 to 10 s is way too long time and only results in heating up the resistor.