3 Axis CNC router

[Limestone]

That is an interface converter that transforms a 0-10V analog signal to 0-20mA

[Clive S]

This is it http://uk.rs-online.com/web/p/signal...oning/4184859/

I think they are used in industry to remote measure sensors etc over a two wire system like this;-

https://www.acromag.com/sites/defaul..._Loop_904A.pdf

http://www.murata-ps.com/data/meters/dms-an20.pdf

[JoeHarris]

This is it http://uk.rs-online.com/web/p/signal...oning/4184859/

I think they are used in industry to remote measure sensors etc over a two wire system like this;-

https://www.acromag.com/sites/defaul..._Loop_904A.pdf

http://www.murata-ps.com/data/meters/dms-an20.pdf

Thanks Clive, I had found it on RS but it still didn't mean a lot!! I have bought a second hand cabinet and it came with a few bits and bobs left inside there were a couple of these which I did not recognise- don't think they will be all that useful! eBay...

[driftspin]

It is a signal converter, 0-10volts to 4-20mA.


hvac stuff.



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[routercnc]

Good work on the mock up Joe. I did mine the other way around with the on /off immediately after the 24V psu. This was my master control. Then the reset to switch the relay/pilz which switched the contractor. If you have an estop event you are then just jumping between estop switch and reset rather than having an on off in there as well. Both ways work just felt like a better operation flow

[JoeHarris]

Quick question folks. I have bought a huge second hand control box for a bargain price and I'm starting to layout the various components. I am going to keep the 24v cables separate from the mains. Should you keep the 80v cables for the drives separate from the mains too?


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[Clive S]

Quick question folks. I have bought a huge second hand control box for a bargain price and I'm starting to layout the various components. I am going to keep the 24v cables separate from the mains. Should you keep the 80v cables for the drives separate from the mains too?


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Its always good practise to keep them apart as much as practical. Also I know that you have purchased good quality cable for the mains stuff. Its nice to keep the colours brown and blue as well for 230V and say red and black for the 24Vdc that will help to avoid confusion.

[JoeHarris]

Its always good practise to keep them apart as much as practical. Also I know that you have purchased good quality cable for the mains stuff. Its nice to keep the colours brown and blue as well for 230V and say red and black for the 24Vdc that will help to avoid confusion.

Thanks Clive

[JoeHarris]

I have decided to use XLR connectors between the control box and the steppers. I have ordered some 5pin with male for the cable and female for the cabinet. The four cores of my cy will go into pins 2-5 with the shielding braid going into pin 1 like this how to video:
https://youtu.be/89XDGtJzzBc
My question is do you connect the shield as you come into the cabinet or right at the point of connection with the drives? And do you go straight to the cabinet/back plate or run a wire to the star ground. Apologies if this seems basic to some of you!


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[Neale]

Not saying that this is right, or the only way to do it, but it is working for me...

I use 4-way XLR. CY cable from the motor has its braid soldered to the shield terminal in the XLR plug. Because I don't trust the socket to make a sound electrical connection to the powder-coated cabinet, I run an earth wire inside the cabinet from the earth terminal on each socket to the star earth. Each XLR socket has CY cable to the stepper driver with the shield connected to the socket's earth tag (along with the wire to the star point). I should probably not have daisy-chained the socket earths to each other and then to the star point as each should have had its own wire (probably). I have had no noise issues with my cabinet wiring. At least, not as far as I know.