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Author Topic: E-Stop Settings  (Read 8277 times)

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Offline kolias

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E-Stop Settings
« on: September 01, 2012, 12:10:38 PM »
I have a thread “New Build” which is related to the build of my new cnc but I’m starting this thread which will be related to the settings. I don’t know if its appropriate, pls correct me.

The E-stop is not working. I use the automated setup of inputs and Mach is picking pin #10 put this pin is taken by Y Home / Y- . So when I press the E-stop I get the message (Limit switch is triggered).

If I manually put pin #15 which it was suggested by others the E-stop is not working.

Also since the X & Z were travelling in the opposite direction, I ticked the reversed column in the Homing / Limits and now they travel in the right direction but I’m not sure if it is ok to do that.

I attach here my XML in case is needed
Nicolas

Offline Hood

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Re: E-Stop Settings
« Reply #1 on: September 01, 2012, 02:55:38 PM »
If you press the E-Stop when you have pin 10 assigned does it work?
When you trigger a Y limit switch does it work?

Regarding the reverse, yes thats ok the other alternative is to change the active state of the Dir pin for that axis.
Hood

Offline kolias

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Re: E-Stop Settings
« Reply #2 on: September 02, 2012, 11:24:30 AM »
Thanks Hood for the help

I downloaded the XML from Gecko and now the E-stop works fine but there are a few other grey areas

I have connected all shield wires from the limit switches to the DC ground bar. Should I do the same for all motor shields?

I set all limits using the “Automated Setup of Input Pins” and it assigned pin 12 for X & Z, pin 11 for A and pin 10 for Y. When I manually press any limit switch except A it triggers the “Limit Switch Triggered” message on Mach and have to press the Reset. But when I manually press the A I don’t get this message.

However when I press the A limit switch, on the diagnostic screen the LED lights up which means the A is active. BTW the A & Y are slaved and perhaps because of that it should not trigger a reset message?

I want to home the machine but since I have my doubts about the A I’m afraid to do so.
Nicolas

Offline Hood

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Re: E-Stop Settings
« Reply #3 on: September 02, 2012, 12:16:30 PM »
Maybe I am misunderstanding you but you  should not connect a shield to DC, the Shield should connect to what we call Earth and  at a single point in your control cabinet,  All shields should do this.

I would think the A should trigger no matter whether it is slaved or not, maybe it is just set as a Home switch rather than limits, if that is the case then it will not trigger a limit as it is simply set as a Home switch.
Hood

Offline kolias

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Re: E-Stop Settings
« Reply #4 on: September 02, 2012, 02:30:37 PM »
The earth (ground) from the 120VAC is connected to a central ground bar and all negatives from the DC power supplies connect to this same ground bar, I was told its called Earthed Star Point.

So I will connect to this Star Point the motor shields too

You are right, the A limit is now set as a Home switch only. I will set it also as a limit (so it will be a Limit and a Home switch). Hope its ok to do that

Much appreciated
Nicolas

Offline Hood

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Re: E-Stop Settings
« Reply #5 on: September 02, 2012, 02:40:38 PM »
and all negatives from the DC power supplies connect to this same ground bar
Certainly no expert on electronics but dont think I have ever seen that and have never done that myself.


You are right, the A limit is now set as a Home switch only. I will set it also as a limit (so it will be a Limit and a Home switch). Hope its ok to do that

Much appreciated


That should be fine.

Hood

Offline kolias

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Re: E-Stop Settings
« Reply #6 on: September 02, 2012, 03:24:08 PM »
Certainly no expert on electronics but dont think I have ever seen that and have never done that myself.

That’s funny Hood because there is this John in another forum who is located in England and he guided my to wire my G540 and all other controls in my enclosure including beautiful schematics; he told me about the “Earthed Star Point” and I thought it was common over there.

Anyway my controls works very good so far
Nicolas

Offline Hood

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Re: E-Stop Settings
« Reply #7 on: September 02, 2012, 03:37:15 PM »
Earthed star is common but it is for shields to drain to earth, its the DC 0v I have never seen connected to this point.
Hood

Offline kolias

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Re: E-Stop Settings
« Reply #8 on: September 02, 2012, 03:59:24 PM »
Earthed star is common but it is for shields to drain to earth, its the DC 0v I have never seen connected to this point.
Hood

Have a look in post 95 to see the schematic

http://www.cnczone.com/forums/general_topics/154454-g540_e-stop-9.html

I hope its ok to post this link
Nicolas

Offline Hood

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Re: E-Stop Settings
« Reply #9 on: September 02, 2012, 04:04:40 PM »
It may well be ok, but as said its certainly not anything I have seen before.
Jeff or Ray may be the people who could give you more of an idea on it.
Hood