routercnc_MK3

[routercnc]

I had the meter on max setting and still got no reading

Final system will be 24V when PSU arrives - testing on 12V for now

[Clive S]

OK

If the internal R is 5K then the most current that can flow at 12 V will be 2.4mA. Just to prove this put the meter in series with the black wire to gnd and check (put the meter on to the mA range). I am sure that I used one of these sensors connected to the 5V input of my bob. But don't let the magic smoke out. ..Clive

[HankMcSpank]

I was just about to suggest trying to establish what value the internal R is (on the sensor)....try connecting a 4.7k resistor between your sensor's black wire & your supply voltage ground ...power up the sensor & measure what voltage you have across the 4.7K resistor (it doesn't have to be a 4.7k resistor ...whatever resistor you have to hand!)

[routercnc]

Small update. Thanks for all your help on the proximity switches. I think I have a plan on that now but will revisit that later because . . .

24V PSU, 2off 24V relays, and the 20A contactor all arrived in the post today! Big thanks to Dean for some behind the scenes help .

Managed to get a quick hour in the garage tonight and made some progress:

24V PSU wired in
Contactor to control the linear power supply mostly wired in (need the 24V DC feed to complete)
Shifted all the earth blocks to a common location to make proper star-earth point
Made new earth cables to suit
Added terminal end block clamps to stop them wobbling around
Swapped out one of the 12V relays for the new 24V, but not wired in. Got one more to do.
Added 2 pairs of green adapter brackets (near the VFD) - these will guide the power and signal cable (not added yet). Not really required but they were about £1.30 for 2 on ebay and I just liked the look of them !

Overview:


AC DIN rail coming along:


DC DIN rail getting close (ignore 12V labels it will be 24V):


Questions on the contactor:
T1, T2 are the mains input ?
L1, L2 are the switched output ?
Should I keep the earth permanently connected (i.e. not through T3/L3 of contactor) ?
A1 / A2 24V DC polarity important? I'm guessing not.
There is a 0 / 1 switch in the middle - some sort of tester / over-ride? Can I leave it at 0 ?

[JAZZCNC]

Questions on the contactor:
T1, T2 are the mains input ?
L1, L2 are the switched output ?

Yes Either or doesn't matter really it's just a switch.

Should I keep the earth permanently connected (i.e. not through T3/L3 of contactor) ?

Yes leave Earth unbroken.

A1 / A2 24V DC polarity important? I'm guessing not.

Yes it matters. A1 is Positive A2 Negative.

There is a 0 / 1 switch in the middle - some sort of tester / over-ride? Can I leave it at 0 ?

It's not a switch it's a Lever. The Contactor can have a Module added onto front and this switches it. Look inside the Box it came in and you'll see what i mean.?

[Clive S]

routercnc

It's a very neat and tidy job you are doing.
.
May I ask where you got the three blue connectors (on the din rail next to the relay) from?.
.
Can I see a blue wire trapped under the din rail where the connectors are!! ..Clive

[routercnc]

Dean

Thanks for the info. Rushed out into the garage and didn't really see the printing inside the box!

Clive
Thanks for the encouragement!

blue terminal blocks were from ebay
http://m.ebay.co.uk/itm/331547573505?nav=SEARCH
They are really for mains neutrals but work ok like this

Had another look at the picture and it does look like a wire is trapped but it must be a bit of outer sleeving that has dropped into the rail. I was stripping a lot of cables last night.

[JAZZCNC]

ICan I see a blue wire trapped under the din rail where the connectors are!! ..Clive

Bloody hell Clive you must have eaten some carrots as a Kid. Had to look really hard to see that even after you highlighted.

[Clive S]

Bloody hell Clive you must have eaten some carrots as a Kid. Had to look really hard to see that even after you highlighted.

That's what happens when you won't go to bed early.

[Tom J]

Bloody hell Clive you must have eaten some carrots as a Kid. Had to look really hard to see that even after you highlighted.

I start using spec glasses at 40, try the same Dean:)