What do you mean by the nature of the contacts? What's written on the limit switch itself?

 

It will show the action either by letters (N.O./N.C) etc or a legend/diagram.
With a meter, you measure the continuity in the off state and then operate and show the relative contact closures.
Max.

 

What's on the diagram is matching the action of the switch. I assume that C is common?

 

So just to recap, If I have this right?
You originally have a common type of limit switch that has a NO & NC contact and you want to replace them with the toggle switches?
If so, the toggle switches have a different mode of switching to the L.S.
I have no idea what the controller expects as to inputs, but the bottom line is the toggle will not directly replace the switching action of the L.S.'s.
Max.

 

So what could replace those flimsy microswitcges? Ideally a toggle switch or rocker switch would be good.

 

isit unusual for a system to use NO and NC switches at the same timr?

 

isit unusual for a system to use NO and NC switches at the same timr?

I would have expected a simple N.O. for each side, not sure why they include a N.C.?
Unless it was for some kind of interlock to prevent operation for any other switch.
Max.

 

On my diagram are the blue and white cables to the load? Or it's actually the return path?

 

Blue and white are just N.C. contact sense.
If the unit still operates, did you try to just use the C and N.O. input and see if the unit still functions without the N.C. input?
Just to see what the effect is, if any?
Also check the other operations simultaneously to see if any thing changes.
Max.

 

That will be my next step so are the blue and white the "hot" wires?


BTW what is the common on a switch?

 

C = common.
Switched to either NC or NO.
Max.

 

But if we take a light switch the common is the hot does it apply to a microswitch as well?

 

In a simple single contact switch, SPST, it is arbitrary which you use as Common.
Max.

 

OK thanks for your help I think my next try will be to connect the blue and white like it is on my diagram (both ends of the switch) and putting the green wire (NO) in the middle of the switch and see what happens