Unable to Communicate With M2

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bengizmo
Posts: 3
Joined: Sat May 17, 2014 3:08 am

Unable to Communicate With M2

Post by bengizmo » Sat May 17, 2014 3:59 am

Hi,

I've been a happy M2 owner since Christmas, but I've recently ran into an issue with not being able to communicate with my printer. The issue began one week ago, but I haven't had much time to diagnose it until today. I'm pretty sure that I have a 24r2 printer with stock firmware and I am using Simplify3D with Windows 7 x64 to control it. I always print with a heated bed + hairspray and print with PLA at about 210 degrees.

I had just started a 10 hour print with white PLA and was sitting beside the printer to make sure that the print began smoothly. About 10 minutes into the print, the servos all stopped moving as if the external reset was pushed, but the fans didn't do the regular on/off reset sequence. The bed then lowered and then the printer sat there with it's fans idling. I was printing from the SD card at the time but the USB cable was still connected to the computer, so I did the following:
  • I started by trying to disconnect and reconnect to the printer via the software buttons in Simplify3D - didn't work

    Code: Select all

    Attempting connection at COM20...
      Error connecting to port.
    Attempting connection at COM20...
      Error connecting to port.
    Attempting connection at COM20...
      Error connecting to port.
    Attempting connection at COM20...
      Error connecting to port.
    Attempting connection at COM20...
    
    I then proceeded to re-seat the USB cable and retry the program, no effect
    I pressed the external reset button - the fans reset and then - in Simplify3D's Communication Window - it started spitting out junk into the command window. I thought it might be a baud rate issue, but my baud rate had not changed from the original 115200 bits/sec.

    Code: Select all

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      Connection failed.
    I then powercycled the unit a few times - no effect
    After reading a bit on the Google Groups forums, I decided to uninstall and reinstall the Rambo drivers - no effect
    Next I changed the COM port in Windows - still no fix
    After that, I loaded up Arduino 1.5.6r2, set the board to Arduino Mega and proceeded to open up the Serial Monitor. The serial Monitor began to show the same garbage that was seen in Simplify3D (see attached picture). While it was barfing characters to the serial line, I decided to hit the reset button and viola - plain text! This got me hopeful, but all I received was that start-up text dump with the status of the machine; nothing else would come through no matter how many times I tried to reset the machine
    After a few resets, the printer wouldn't barf out the non-readable characters anymore, but only just show that start-up status message. I tried issuing a few commands in the Arduino IDE, but I received no response
    I tried removing fans, sensors, servo connectors but nothing helped; still no two way communications
    Finally, I tried a different computer to see if my USB ports on the original computer were faulty. In the Arduino IDE, I am still only able to receive the status message after a recet and nothing else.
    Just in case, I briefly checked the RAMBo board to see if there was anything visibly wrong. I didn't see any blown caps or damaged components.

I think I've exhausted all of the troubleshooting options available, but does anyone else here have any suggestions? Is my RAMBo board toast? Also, what might have caused this?

Thanks!
Attachments
M2 Serial Output.png
Output of serial line from Arduino IDE
(86.33 KiB) Downloaded 904 times

bengizmo
Posts: 3
Joined: Sat May 17, 2014 3:08 am

Re: Unable to Communicate With M2

Post by bengizmo » Mon May 19, 2014 4:00 am

Bump - Any ideas?

jsc
Posts: 1864
Joined: Thu Apr 10, 2014 4:00 am

Re: Unable to Communicate With M2

Post by jsc » Mon May 19, 2014 4:18 am

You seem to have been pretty thorough in your debugging procedures. If it doesn't work with a second computer, that seems to rule out any software issues. You've also tried a plain terminal program (which is what the Arduino IDE is, essentially).

At this point, I would recommend you get in touch with MakerGear support (support@makergear.com), and perhaps they might have further ideas. You are also under the six month warranty period, so I wouldn't dawdle.

bengizmo
Posts: 3
Joined: Sat May 17, 2014 3:08 am

Re: Unable to Communicate With M2

Post by bengizmo » Wed May 21, 2014 7:18 pm

Update - turns out that I have a RAMBo v1.2 board in my machine, which means that it was susceptible to ESD damage. This is corrected in new boards. I should have received a jumper that would have fixed the problem, but I never saw it in the mail. Details of the ESD problem here >> https://groups.google.com/forum/#!msg/m ... lU6AolowoJ

Makergear was super helpful in responding to my problem and they have shipped me a new board. I can't wait to start printing again!

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