Last edited by cropwell; 29-11-2015 at 02:54 PM.
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Another reason is the sensing repeatabilty is actually better when sliding over rather than approaching head on. Most Quality Prox switches data sheets will give specs on both types of approach.
Common sense because you've researched and tested the answer! I would have thought (probably like a lot of people) that end-on would give better results although I am now quite convinced as a result of your testing demo a while back. I did worry about over-run though, and it's good to know that there's a simple answer.
OK Great. Thanks Jazz.
So hopefully that's the plan sorted now. Reckon I might get stuck along the way, but i will give it a go.
So am i right in saying I need NC ones. So that when it detects something it opens and breaks the circuit ?
I will have to ensure that the aluminium frame of the router won't cause false triggers then on the prox switches.
Does NPN or PNP matter for my purposes ?
Do these look like they will do the job?
Thanks again for all your help. Couldn't of done without it.
these are NO so would need to be wired in parallel if you only want to use one input on the BOB for the three switches.
If your BOB has hardwired pullups to 5 V you would need NPN type. otherwise either will do.
Last edited by Clive S; 29-11-2015 at 07:27 PM...Clive
NPN or PNP depends on your control. Nearly all have either +5 or +24V inputs,
for those you need NPN. I have never seen any control unit who works with ground signals. But it must exist, because so many PNP switches are offered.
Sorry to be dumb guys but im getting lost within the techno on your answers to my question, I am no electronics engineer!
I found this wiring diagram for my KK01 specifically for prox sensors..
There are also some words underneath which say..
"We would normally recommend using one input for all limit switches and wirethem through normally closed contacts in series when using mechanical limitswitches and parallel for normally open or open collector proximity switches etc. "
Can I just copy this wiring diagram for the sensors and put my 24v in where it says 6-36v?
Any problems with this ? They suggest these prox switches : LJ12A3-4
Last edited by mturneruk; 29-11-2015 at 08:20 PM.
Martin The ones I linked to will be fine and yes the drawing is OK If you are going to just use one input.
But do the Estop circuit as you have been advised by Jazz earlier..Clive
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Last edited by mturneruk; 29-11-2015 at 09:59 PM.
Also you use the E-stop portion the same but instead of running thru the E-stop button like they show run it thru the Relay Contacts of the E-stop system I did for you. Then power the Relay coils like I show using the E-stop button.
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