Limit switchs

NO or NC? I'm using 5i25 and 7i77.

I don't think it matters. You would invert if it was backwards.

Although mine are both and I made mine nc on the paraport. When I switched to the 7i96 the input light is on except when the switch is pushed. I had to invert my pins If it wasn't soldered I would probably switch it

Inverting the pins?

In the Hal file(or thru the wizard) you reverse the pin so instead of expecting the switch to be closed it expects it open or vise versa.

In general NC is preferable for limit/home switches, because a broken wire will
cause a fault rather than possible uncontrolled motion past the physical limits

O.K. Here is the section in the hal file. I think. Still new and learning.


# external input signals


# --- BOTH-HOME-X ---
net both-home-x <= hm2_5i25.0.7i77.0.0.input-01

# --- BOTH-HOME-Y ---
net both-home-y <= hm2_5i25.0.7i77.0.0.input-02

# --- MIN-HOME-Z ---
net min-home-z <= hm2_5i25.0.7i77.0.0.input-03

# --- MAX-Z ---
net max-z <= hm2_5i25.0.7i77.0.0.input-04


So to reverse the pin. How?

Thank you for the answer. A good friend did most of the wiring for me. Some of the limits switches are wired NO and some are wired NC. So I will switch them to all NC.

jeffie-3 wrote:

O.K. Here is the section in the hal file. I think. Still new and learning.


# external input signals


# --- BOTH-HOME-X ---
net both-home-x <= hm2_5i25.0.7i77.0.0.input-01

# --- BOTH-HOME-Y ---
net both-home-y <= hm2_5i25.0.7i77.0.0.input-02

# --- MIN-HOME-Z ---
net min-home-z <= hm2_5i25.0.7i77.0.0.input-03

# --- MAX-Z ---
net max-z <= hm2_5i25.0.7i77.0.0.input-04


So to reverse the pin. How?

Add _not at the end of the line.

That worked for my 7i96. I would think it's the same for all the combos. It will yell at you if it's wrong

# external input signals


# --- BOTH-HOME-X ---
net both-home-x <= hm2_5i25.0.7i77.0.0.input-01_not ?

jeffie-3 wrote:

# external input signals


# --- BOTH-HOME-X ---
net both-home-x <= hm2_5i25.0.7i77.0.0.input-01_not ?

That's all I had to do.