Giant 20' x 3' x 2' router build

[EddyCurrent]

Don't talk daft Man course it's masking the problem if you haven't found out why.!! Also you can't say proximity switches are the wrong product for the job of sensing it's what they are made to do for gods sake.! Only thing that could be questioned is the quality for intended application.

You keep on about people picking you up wrong but now you're doing it yourself.

My conclusion is that it's capacitance of the cable so using mechanical switches is not masking it but using a product that will work in that situation.
I never said specifically that proximity switches were the wrong product for the job, but maybe 'those' ones are.
I know full well what sensors of all kinds are made to do having been in industry electricals for over 40 years.

I think the home switches will be okay because of the slow approach speed.

All other aspects I think are what is to be expected with DIY.

[JAZZCNC]

You keep on about people picking you up wrong but now you're doing it yourself.

My conclusion is that it's capacitance of the cable so using mechanical switches is not masking it but using a product that will work in that situation.

No not really got it wrong at all.! Have you considered Your Conclusion is wrong.? Swapping for MS is masking the issue has the capacitance is still there and needs dealing with rather than avoiding (masking). Charlie as tried different cable and it's still there, was worse actually, yes could still be capacitance but I don't think so at only 12mtr length and 24Vdc. But my conclusion could be wrong also.?

The home switches are not Ok even at homing speeds this has been tried.! Also how can they be trusted if we haven't conclusively found the cause.?
Your method while yes maybe getting the machine working isn't the correct one IMO. It's still a mask for the real cause and who's to say this cause isn't going affect other aspects of the machine later down the line.? . . . .What if it is a wiring or grounding issue that isn't found now but surfaces at a later date when newness wears off or other attachments get added like probes etc which could suffer from same issue.?

Best resolved now and after all obvious causes have been eliminated then the next logical choice is to replace suspect components for same type or like in this case with same type but being of better quality. Changing to a compleltely diffeant switch type will in this case potentially mask some other cause or fault.!

[charlieuk]

Thanks for all the input guys I went to rs but they didn't have anything suitable in stock and it would be 3-4 weeks the chap was looking at some by omron ? So unfortunately walked away with nothing. Tony has just found two to try from a place near him in Leicester and he is going to bring some micro switches down tomorrow as we'll just for a test per poses, hopefuly a second brain will help find out what's going on so fingers crossed. Many thanks for all the help it's much appreciated having people to bounce ideas around with.