Ramps/Mega movement issues

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This topic contains 15 replies, has 2 voices, and was last updated by  Ryan 1 year, 4 months ago.

Viewing 16 posts - 1 through 16 (of 16 total)
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  • #12811

    Jason
    Participant

    So I got my mega flashed with the no lcd and 5/16 rod firmware last night (B16_32-LCD-112515).

    I connected up my drivers and steppers. I can only get movement when I click on the home buttons. Nothing when I try to move them on the control screen. The server seems to think they have moved as the position indicator has moved on screen.

    Power wise I only connected the outside set of positive and negative. Do both sets need to be connected? As far as I know the other set is for powering a hotend and bed which I do not have connected.

    I have no end stops connected at the moment. Drivers are 8825 plugged in correctly with the pot facing the power plug.

    Anyone know what is going on here?

    #12818

    Ryan
    Keymaster

    It is behaving like you have endstops plugged in. Either you changed my firmware or you have something plugged in to an end stop port.

    #12819

    Jason
    Participant

    Nope. Just straight uploaded the firmware and only drivers and motors plugged in.

    #12820

    Ryan
    Keymaster

    Check your ramps shield then sounds like you might have a short, or a bad board.
    Inspect the board around and under the end stop pins. This happens, I have to test every axis on every single board I sell, usually sloppy solder is causing a short or your board is bad.

    #12821

    Jason
    Participant

    Ugh… Probably right. Cheap Chinese crap. Will inspect tonight.

    #12827

    Jason
    Participant

    Would it make any difference if I added that U8Glib… I was having issues uploading at first and so I added that library. But I see for this version of the firmware I do not need it.

    #12833

    Ryan
    Keymaster

    No, the firmware doesn’t call it so it won’t get compiled in.

    You can always try bending the endstop pins so they don’t plug into the arduino. The traces are easy to follow on the bottom of the shield.

    #12834

    Jason
    Participant

    If I am not mistaken there is a command I can run that would check the status of the end stops… That should tell me if there are shorting no?

    #12835

    Ryan
    Keymaster

    Sure, I’m not sure what it is though.

    #12836

    Jason
    Participant

    Just found it… M119

    #12887

    Jason
    Participant

    All min and max endstops show open for x y and z

    was getting a checksum error as well but i think that is because I dont have an sd card reader

    would the mintemp error cause this?

    1 pin is loose. The single pin just above all the end stop pins. Its label 12c on my ramps what does that one do?

    #12889

    Ryan
    Keymaster

    Yes, you didn’t put the resistor on?

    #12892

    Jason
    Participant

    … son of a bitch. I figured for just movement the temp wouldnt matter. Good thing I have 3 or 4 spare thermistors kicking around. I will try that tomorrow.

    Any idea what that loose pin does?

    #12921

    Jason
    Participant

    removed… would not have worked.

    #12941

    Jason
    Participant

    SUCCESS… I can move them! Printing of the new center has started… Hopefully about a week and I can get this thing dirty!

    Thanks for your help Ryan

    #12942

    Ryan
    Keymaster

    SWEET!

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