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Author Topic: home switches wiring  (Read 2657 times)

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Offline mvoros

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home switches wiring
« on: April 06, 2013, 03:58:07 PM »
Hi All,
I'm currently changing  my Jcut 6090B router over to ESS, and doing an almost complete rewiring, mostly because of noise issues, and limit switch crashes. My question for now is: do I have to wire the switches in series, or can I just run from each switch directly to the BOB? I have enough shielded wire to do the runs to the control box.
I appreciate any help someone can give me.
Sincerely,
Mike
« Last Edit: April 06, 2013, 04:05:17 PM by mvoros »

Offline Hood

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Re: home switches wiring
« Reply #1 on: April 06, 2013, 04:06:03 PM »
You can do either, normally limits are run in series to simplify wiring and use less inputs but if you have enough spare inputs and it doesnt add much to the wiring then no problems doing them individually. Just make sure you use shielded wires and have the shields properly grounded,  as you have already seen noise can be an issue with 5v signalling wires.
Hood

Offline mvoros

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Re: home switches wiring
« Reply #2 on: April 06, 2013, 05:18:50 PM »
Thanks Hood, as always you come thru for me.
Upon getting the limit switches and their (Chinese people's) wires out (witch were not shielded), I noticed that they soldered the switches NO and had 24 volt to activate them. The Mach3 settings were set to active low. I don't think this was the right way to do it. Anyway, I'm going to change all that. On another note, I'm running the spindle motor wire in a separate flexible metal conduit. They had all the wires crossing each other in the track. That also contributed to the many crashes I had, I think.
Mike

Offline Hood

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Re: home switches wiring
« Reply #3 on: April 07, 2013, 04:25:17 AM »
Oh well at least they had one good thing ;D the 24v is always preferable to 5v for signalling and shielding shouldnt really be needed. I dont have any of my wires shielded on my machines, well servo  power  and encoders are but none of the 24v signalling is. Sadly its not an option for the ESS unless you add additional hardware to convert to 5v just before it goes to the ESS. However 5v should work fine as long as you shield things.
Hood

Offline mvoros

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Re: home switches wiring
« Reply #4 on: April 08, 2013, 12:42:50 PM »
What kind of additional hardware would I need to the ESS setup, to run 24 Volts to the limits, and where can I buy it?

Offline Hood

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Re: home switches wiring
« Reply #5 on: April 08, 2013, 02:32:40 PM »
You could use relays or maybe an opto isolator.
Hood

Offline mvoros

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Re: home switches wiring
« Reply #6 on: April 08, 2013, 02:44:24 PM »
Thanks Hood,
I will look into it.
Mike