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Author Topic: GROUNDING - what is the correct way to ground a CNC machine?  (Read 47041 times)

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Offline Hood

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Re: GROUNDING - what is the correct way to ground a CNC machine?
« Reply #20 on: January 12, 2014, 06:33:10 PM »
Previously I have used various methods from relays to optos. Nowadays I use CS-Labs controllers on my machines and they have 24v I/O.

Hood

Offline Rimmel

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Re: GROUNDING - what is the correct way to ground a CNC machine?
« Reply #21 on: January 12, 2014, 08:32:38 PM »
Got a simple diagram handy by any chance?

Thanks

Offline Hood

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Re: GROUNDING - what is the correct way to ground a CNC machine?
« Reply #22 on: January 13, 2014, 02:55:35 AM »
No diagram but easy enough, for example a relay with a 24v coil would be used for Inputs to Mach, the coil would be powered via a limit switch and when broken the contacts would  open (NO contacts on relay) and the contacts side would be connected to the BOB just like you would any other input.
For outputs it would be the opposite, the coil would be 5v and the contacts would have the 24v.
Hood

Offline Rimmel

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Re: GROUNDING - what is the correct way to ground a CNC machine?
« Reply #23 on: January 13, 2014, 05:46:17 AM »
Ah yes I see - I prefer the solid state/opto route. Which opto's are suitable, I can find many but many seem to have a minimum 24v switching capacity.

Offline Hood

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Re: GROUNDING - what is the correct way to ground a CNC machine?
« Reply #24 on: January 13, 2014, 06:54:16 AM »
Never used Solid state relays, cant recall the optos I used I am afraid.
Hood

Offline simpson36

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Re: GROUNDING - what is the correct way to ground a CNC machine?
« Reply #25 on: January 13, 2014, 07:38:54 AM »
Opto   LTV847

Offline Rimmel

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Re: GROUNDING - what is the correct way to ground a CNC machine?
« Reply #26 on: January 13, 2014, 08:32:31 AM »
Brilliant thanks - any idea how to wire it for 24v control?

thanks

Offline Fastest1

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Re: GROUNDING - what is the correct way to ground a CNC machine?
« Reply #27 on: January 13, 2014, 08:34:55 AM »
I see SSR's with triggering voltages of 3-32v often.
I want to die in my sleep like my grandfather, not like the passengers in the car! :-)

Offline Rimmel

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Re: GROUNDING - what is the correct way to ground a CNC machine?
« Reply #28 on: January 13, 2014, 08:40:21 AM »
I see SSR's with triggering voltages of 3-32v often.

Do you also see dead people :-)

Offline simpson36

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Re: GROUNDING - what is the correct way to ground a CNC machine?
« Reply #29 on: January 13, 2014, 10:05:29 AM »
Brilliant thanks - any idea how to wire it for 24v control?

thanks

Actually, yes I do.

What I do not have is patience for questions asked in layers with zero effort in between.

Good luck with your project.