Problems with 7i76e setup

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01 Apr 2017 10:25 #90685 by deawe
Replied by deawe on topic Problems with 7i76e setup
I downgraded to linuxcnc 2.7.8 from the "linuxcnc.org/ wheezy base 2.7-uspace" repository. It did not lead to any change in behavior, though. For completeness, the current output from linuxcnc_info is included below:
This file can be posted to a web site like:
     http://pastebin.com
in order to provide information about the linuxcnc
system and configuration.

VIEWER=mousepad
                Date: Sat Apr 1 13:24:30 EEST 2017
            UTC Date: Sat Apr 1 10:24:30 UTC 2017
        this program: /usr/bin/linuxcnc_info
              uptime: 13:24:30 up 7 min, 1 user, load average: 1.12, 0.80, 0.40
     lsb_release -sa: Debian Debian GNU/Linux 7.11 (wheezy) 7.11 wheezy
      which linuxcnc: /usr/bin/linuxcnc
                 pwd: /home/dea
                USER: dea
             LOGNAME: dea
                HOME: /home/dea
              EDITOR: 
              VISUAL: 
            LANGUAGE: en_US:en
                TERM: xterm
           COLORTERM: Terminal
             DISPLAY: :0.0
        display size: 1280x1024 pixels (338x270 millimeters)

uname items:
         nodename -n: linuxcnc
      kernel-name -s: Linux
      kernel-vers -v: #1 SMP PREEMPT RT Debian 3.2.86-1
          machine -k: linuxcnc
        processor -p: unknown
         platform -i: unknown
      oper system -o: GNU/Linux

/proc items:
             cmdline: BOOT_IMAGE=/boot/vmlinuz-3.2.0-4-rt-686-pae root=UUID=2198db8f-3994-42a7-a495-4e348482a949 ro initrd=/install/gtk/initrd.gz lapic quiet rootdelay=5
          model name: Intel(R) Core(TM)2 CPU 4300 @ 1.80GHz
               cores: 2
             cpu MHz: 1200.000
             parport: e000-e002 : parport1 e003-e007 : parport1 ec00-ec02 : parport0
              serial: 03f8-03ff : serial

Varsions:
                 gcc: gcc (Debian 4.7.2-5) 4.7.2
              python: Python 2.7.3
                 git: git version 1.7.10.4
                 tcl: 8.5
                  tk: 8.5
               glade: not_in_PATH
          glade-gtk2: glade3 3.8.0

linuxcnc_var all:

     LINUXCNCVERSION: 2.7.8
            REALTIME: /etc/init.d/realtime
                 RTS: uspace
          HALLIB_DIR: /usr/share/linuxcnc/hallib

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01 Apr 2017 11:22 #90689 by PCW
Replied by PCW on topic Problems with 7i76e setup
If you cannot run the 7I76E from correct TB3 power, you have a bad or damaged 7I76E

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01 Apr 2017 12:38 #90695 by deawe
Replied by deawe on topic Problems with 7i76e setup
Okay.

To conclude this I have attached a photo of the board powered through the TB3 terminal. The field power LED is lit and visible through the leads, but the logic power LED does not turn on. I guess we can agree then that the board is faulty? And for reference, the board is resting on an ESD mat, and have been so ever since I took it out of the bag it was delivered in.
Attachments:

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01 Apr 2017 13:34 #90700 by tommylight
Just to be sure, is the jumper for Vin and Vfield set to correct position?

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01 Apr 2017 14:08 #90703 by deawe
Replied by deawe on topic Problems with 7i76e setup
Yes.

According to the 7i76e manual: "If you wish to use a single power supply for the 7I76Es field outputs and field logic power, W1 should be placed in the left hand position. This connects field power to VIN." It's possible to make out the position of the jumper below the yellow TB1 connector in the photo I attached. The jumper positions in the manual refer to the board oriented with the RJ-45 connector on the left-hand side, so the photo has to be rotated 180 degrees to correspond to that.

In any case, I would not think that the field power jumper would affect the supply to the logic section of the card.

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01 Apr 2017 14:11 - 01 Apr 2017 14:12 #90704 by PCW
Replied by PCW on topic Problems with 7i76e setup
So it looks like a bad or damaged card, You should request a RMA number from Mesa
with the order number and description of problem and the card can be returned for repair/replacement
Last edit: 01 Apr 2017 14:12 by PCW.

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01 Apr 2017 14:18 #90705 by rodw
Replied by rodw on topic Problems with 7i76e setup
Sounds like you have the wiring OK and you know more about electronics than I do.
I've attached a very useful wiring diagram for the 7i76e uploaded to the forum by another member.
I have deviated from this setup which seems the same as yours becasue I have applied 5 volt power to P5. That means W1 jumper needs to be changed. Just note that if you use the MPG encoder inputs, you need to tie the GNDs together as per the note on Page 2.

If it is a faulty regulator, perhaps P5 will let you get the board going.
Attachments:
The following user(s) said Thank You: tommylight

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01 Apr 2017 15:18 #90708 by deawe
Replied by deawe on topic Problems with 7i76e setup
I purchased the card from EUSurplus, so I'll take it up with them.

rodw, thanks for the wiring diagram, that is very helpful! I have been looking for something similar, but my searches turned up empty. Do you happen to remember in which thread this was posted? It would be interesting to see a little bit more about it.

Thanks to you all for the prompt and valuable support!
The following user(s) said Thank You: tommylight

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01 Apr 2017 15:23 #90709 by tommylight
Why no 5V on the RJ45 side? Will not work without it. Thank you Rodw i did not notice that before.

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01 Apr 2017 16:27 #90714 by deawe
Replied by deawe on topic Problems with 7i76e setup
If you follow the discussion, you see why I did not have 5V connected to the P3 connector near the RJ-45 jack.

The card should certainly work without 5V on that connector. The following from the manual:

The 7I76E can get its 5V Ethernet, encoder, step/dir and serial interface power from
connector P3 or the on card logic power regulator can be used with unregulated DC power
supplied to TB3

In the photo, I supplied power to TB3 instead.

And also a few posts back:

If you cannot run the 7I76E from correct TB3 power, you have a bad or damaged 7I76E

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