Proximity switches or limit switches

[JAZZCNC]

I can't comment on the switch wire colours without a diagram in front of me, but you do need to take a wire from the -ve pin for your chosen input to the common negative - on the IP/M both sides of the inputs are floating. In Mach3 I seem to remember that you need to select the correct port as well as pin - can't remember it offhand but I think it's either 1 or 10. It's in the manual. Also, be very careful with pin numbering - it's not quite what you might think! Mach3 input 10 is actually physical pin 11 on the CSMIO and its corresponding negative connection is pin 24. Again, this is all in the manual but it's easy to miss (don't ask me how I know, etc...)

You are using NPN type switch so what you actually need to do is Take the Black signal wire to the (-) input and run 24v+ to the (+) input.
The port in Mach3 is 10 and select the input number, not the Pin number because as Neale says they are numbered differently.

[chillybo]

WiringDia_compressed.pdf Thanks Jazz and Neal. Should it be like this then?

[JAZZCNC]

WiringDia_compressed.pdf Thanks Jazz and Neal. Should it be like this then?

Yes that's correct.

[chillybo]

So I have wired the proximity switch as per my diagram and it seems to be working as an E stop rather than a home switch. Its very confusing. Although its an NC proximity switch it seems to be working the opposite way round. When no metal is near the sensor the light on the back of it is on and the message external E stop requested appears and I can not reset Mach 3. If metal is placed near the proximity sensor the light goes off and I am able to select reset and I can jog. As soon as I remove the metal object the steppers stop and the reset button is activated again.
To my mind its as if its set up as an E stop and its acting as a normally open switch. Confused.com
Anyone have any ideas?

[JAZZCNC]

So I have wired the proximity switch as per my diagram and it seems to be working as an E stop rather than a home switch. Its very confusing. Although its an NC proximity switch it seems to be working the opposite way round. When no metal is near the sensor the light on the back of it is on and the message external E stop requested appears and I can not reset Mach 3. If metal is placed near the proximity sensor the light goes off and I am able to select reset and I can jog. As soon as I remove the metal object the steppers stop and the reset button is activated again.
To my mind its as if its set up as an E stop and its acting as a normally open switch. Confused.com
Anyone have any ideas?

Switch the active Lo and it will work correctly. Why it's throwing e-stop I'm not sure, the only reason I can think of is that the E-stop input# is set to same as Limit input #.
The light is on because it's NC and should go out when tripped.

[chillybo]

I managed to get it working and its acting like a home switch now. Jazz I think your right about it having something to do with the E stop input. When I scrolled down and looked at the E-stop port it was not set to port 10. I set the E stop to port 10 (because I'm only experimenting with the electrics and Mach to find out how things work there is no physical E stop). Anyhows if i jog forward and then press home the stepper reverses and when I put a screwdriver near it it stops and rotates the opposite direction briefly. So thats me gaining an understanding of this part of things thanks of everyones advice on here.
Thanks.

[chillybo]

Despite all of this when I go into diagnostics the proximity switch is identified as a home switch as per video

[chillybo]

https://www.youtube.com/watch?v=AvlpkAbFUgY

I think its time to ask Santa for a control cabinet.

[chillybo]

I 3d printed a mount.

Thanks again for all the advice.

[cropwell]

You may wish to revise the end-on approach, the first time you jog into and crush a switch. Don't ask me how I know. They work just as well when the profile just glides in from the side.



Rob-T