Machsupport Forum
Third party software and hardware support forums. => Third party software and hardware support forums. => Topic started by: 9fingerscnc on November 08, 2014, 11:28:13 PM
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I have been working with a ST-V2 5 axis breakout board from stepperonline. I have everything working except for limit switches and e-stop. I have read the mach3 manual several times and searched the web for answers on how to configure this board. I can't seem to get the e-stop and limit switches to work. Looking for answers on how to diagnose the problem. the documentation shows the e-stop setup on pin 10.
(http://www.omc-stepperonline.com/images/cnc-breakout-board-st-v2_01.jpg)
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Here is the link to the documentation on how to setup the board.
http://wiki.midsouthmakers.org/images/e/e2/5axisManual.pdf
when following these instructions I am not able to get the e-stop to work.
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I uninstalled mach3 and then re-installed and ran the setup instructions. Still not able to get the e-stop to work. Starting to think that my PC might have something wrong with it.
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From just a quick look at the installation instructions E-Stop is configured as Active Low.
To follow their wiring instructions your E-Stop switch should be 'normally open' contacts and only closing the contacts when E-Stop is pressed. Is this the way you have it wired ??
Tweakie.
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I have tried both configurations and I can't get either to send a signal back to mach3 and trigger the e-stop.
I thought that I had problem with my parallel port so I setup the board on a different computer today. Same issue.
I have purchased a MB-02-V6 from Homann Design. I plan on moving forward with that board.
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I'm just setting up my mach3 interface so I could be way off on this, but....
I just configured my e-stop and limit switches. The switches on mine are all normally closed except z home which uses the touch plate.
All my switches are connected to the breakout board through the DB9 connection that tie to the breakout board. E-Stop is pin 1 and 9 on the DB9 I have all the limits and homes (except z-) wired in series and tied to pin 8 and 9 on the DB9. z- is hooked to pin 7 and 9 on the DB9.
Hope this helps some.
If you need the wiring from the DB9 to the breakout board let me know, I'll trace them out.
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Oh, one more thing that was driving me nuts, sometimes my ports would work and then other times not.
I discovered the power to the board was not plugged in good and was causing a intermittent open.
There should be two red LEDs lit on the board.
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Did you ever get the Limits and E-stop working?
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There is a guy selling these on eBay as repaired. He states they don't work as is. He has a web site too I think it is Hubbard cnc or something like that. He state that the inputs don't work as the board was made.
Don
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I had the same issue, but the solution is easy:
You have to apply an Voltage on the power supply pins on the right (12V-24V)!
Then you will see another LED near the input pins is active. The Diodes in the optocoupler are not connected to USB 5V won't work without an additional power supply.
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Hi 9fingerscnc,
I am newby with cnc and i also bought from STEPPERONLINE the same breakout st-2 + 3 axis nema 24 kit. You said everything was working except limit switches and e-stop. How did you wired your board? Did you follow the "Typical connection" of "comon anod(+) connection" between this board and motor drivers? (M542T). I mean did you joint in only one wire the (Pulse+) + (Dir+) + (Ena+) from driver to 5v conector at board? And each (-) from the same to each conector at ST-2 board?
I am dealing some problems with connections. I follow the user manual recomendation of common positives. But i also saw at youtube people conecting with common negative wires. So, i am not sure what to do becasue it seems no one or other is working. But i am still trying some solutions. Could you let me know how you did yours?
And about your issue? after this time is already fixed? how you did that?
Regards,
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Hello hersche
Do you mean that you have to supply a voltage superior as 5 v ?
THANKS
carmelo
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Hi Carmelo,
Yes, you must connect 12 to 24 VDC to the terminals indicated as that is required to operate the indicated inputs.
5V will not work.
Russ
:)
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Hi Russ.
Thank you very much for the answer. I'm know more confident and not affraid to burn something!
Regards
Carmelo
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hello all, Tweetie, how are you my friend? I am having the same problem. The E-Stop just does not appear to work as it is supposed too. I too have tried all of the settings, including connecting to P11 and changing the settings on the inputs, but no joy. If anyone has any ideas, please let me know, I am totally
out of ideas.
Larry
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Hi Larry,
Nice to hear from you again.
There are disadvantages with that particular board...
1) It needs 12-24 volts in order for the EStop (or any other inputs) to work.
2) The EStop switch needs to have 'normally open' contacts (most are 'normally closed' contact).
Perhaps a different breakout board would be the best option ??
Tweakie.
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Hi,
Can anyone tell me what chips are those arrowed in Red? is it related to opto isolator chips?
(http://i1204.photobucket.com/albums/bb407/cncfreakcncfreak/BOB/cnc-breakout-board-st-v2_01_zpsgeziqnkq.jpg)[/URL]
thanks,
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found it, 74HC2450.