Can't get Ramps to connect to lcd or repetier-host

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This topic contains 34 replies, has 6 voices, and was last updated by  Ryan 3 weeks, 1 day ago.

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  • #46485

    Teo Nordström
    Participant

    Hello. I live in Sweden and I am building an MPCNC as a School Project. I am having some issues with my machine. Everything until this point has been easy and fun to do, but I think I’ve messed something up at this point. I wanted to try my machine just to see if the motors spinned (had not placed the belts yet) so I install the software i needed and started trying to move it. Repetier-Host gave me “No start signal detected – forcing start” and all moves were put into the “1 command waiting”. I tried again and it still didn’t work. I unplugged the Power and started trying some stuff (note: I didn’t remove the usb Cable here as I didn’t understand that it supplied Power – this might have lead to more serious problems). I plugged in the Smart Controller and it was glowing but it was completely blank.

    This is the point I notice the USB is supplying power. I try some things to make it work but to no avail. I go on and try and flash Marlin over again using the premade one, but I get this message every time. https://pastebin.com/2a7x9dZ0. This is the Point where I find that Ryan tests all the sent away components so now that was to no avail as well. I have tried this with some different baudrates and on two different computers. Nothing is working. Another big problem is that I can only access the machine mondays and wednesdays, and next week is fall break so I can’t access it then. I cannot send it in or anything as I live in Sweden and there are horrible shipping costs and I’d love to not have to spend loads of Money to fix it. “Poor” student y’know. Anyway, I’d love to hear any tips on how I could be able to fix. Thank you all!

    #46486

    Teo Nordström
    Participant

    The LCD did this once: 

    #46490

    Ryan
    Keymaster

    Luckily you didn’t actually flash the board.

    You bought it from me? What did you buy, Ramps, rambo, mini rambo? Is the LCD from me? how is it all plugged in, lets see a picture? Mac or PC?

    #46496

    Teo Nordström
    Participant

    I Did buy it from you, I bought the kit with no Changes (Ramps 1,4), The LCD is also from you and I’m using mac. This is the only pic of my wires when plugged into the Steppers (It’s messy, was planning on fixing that later) 

    Steppers don’t have anything to do with it though, as it still doesn’t work when plugged in without them at home.

    #46498

    Ryan
    Keymaster

    Everything should work as is with the LCD, I’m guessing you just have the LCD wires swapped. Switch them on one end And I think you will be good to go.

    Since it is a Mac some people have issues, see the first line of this page, https://www.vicious1.com/assembly/software/.

    #46501

    Teo Nordström
    Participant

    Firstly, not a mac, and secondly I still get the Repetier-Host “No start signal detected – forcing start”. There is something wrong but I cant find it.

    #46502

    Teo Nordström
    Participant

    Swapped the LCD Cables and the LCD didn’t start at all.

    #46503

    Ryan
    Keymaster
    The LCD is also from you and I’m using mac

    You said MAC?

    Give me a few minutes to think about this, I have no idea what that error is.

    #46504

    Ryan
    Keymaster

    Swap the cables back and try using just the USB or just the power to see if the LCD starts working.

    #46506

    Teo Nordström
    Participant
    The LCD is also from you and I’m using mac

    You said MAC? Give me a few minutes to think about this, I have no idea what that error is.

    Oops, sorry. I was thinking about other stuff and accidentaly typed Mac 😛 I’m only using USB right now as It’s the easiest for me, but I can try using both and only Power.

    #46508

    Teo Nordström
    Participant

    Should also note – I’m not with the machine right now I only have the boards and the Power supply.

    #46514

    Barry
    Participant

    Any chance you can take an up close pic of the lcd adapter board as it’s connected to the ramps, then a good pic of the back of the lcd as it’s connected to the cables?

    #46578

    Teo Nordström
    Participant

    These the ones you need? Remember – the issue is not an LCD issue, its the board. Sorry for not replying for many hours, I was sleeping.

    #46589

    Ryan
    Keymaster

    I only test 30% of the lcd’s but I test 100% of the ramps with an LCD so the problem is usually the LCD.

    Was your LCD open or sealed in the anti static bag (tested or not)?

    I think the best thing to do here is try to flash the board again, something might have happened on your last attempt.

    Can you use my flashing instructions and let us know at what point you have an issue. Make sure that you have installed the drivers that come with the arduino IDE install.

    #46590

    Teo Nordström
    Participant

    I’ve used the flashing instructions and I’ve tried flashing more than once using your instructions and also testing the reset trick, nothing works. Why I know it probably isn’t the LCD is because the ramps wasn’t working to begin with, even Before plugging in the LCD. The LCD came in an open bag. The error comes while uploading and looks like this https://pastebin.com/2a7x9dZ0 . I’m gonna try Another Cable if I have one and see if that does any change.

    #46592

    Ryan
    Keymaster

    That error just says it never connected, and that is an arduino IDE error. What happens when you try and connect with repetier?

    If your lcd was open that means your ramps and lcd were both tested, it is unlikely it is an lcd issue, it could be but I have only had a few problems out of more than a thousand sold.

    At what step does my flashing instructions fail? Just the connection part? Do you see the right com port? Does it go away when you unplug the arduino?

    #46595

    Teo Nordström
    Participant

    Repetier-Host also says “No start signal detected – forcing start” and “Communication timeout – reset send buffer block” I am now trying with a new Cable, but it doesn’t seem to be helping. I am pretty sure that the issue is on my end, that I’ve handled it wrong or something, but the lights are shining and the lcd backlight is on so something must be working. The flashing instructions fail when uploading the firmware, and I do see the right port (It even says COM10: (Arduino/Genuino Mega or Mega 2560)) Probably doesn’t have anything to do with this but I noticed in the Ramps stack assembly part (Which I haven’t followed because it says I don’t have to, I just looked there) this Picture 

    There is no resistor or thermistor there. Thank you for still trying to help me.

    #46599

    Ryan
    Keymaster

    We don’t use that resistor anymore, I thought I deleted that picture or clarified in the instructions about it.

    What version of windows do you have? What else is using the other COM ports, maybe you can unplug some things, usually it is COM 3 or COM 4.

    Have you changed the Buad rate settings in repetier, they should be on auto, or you can try 250000.

    #46601

    Teo Nordström
    Participant

    I’ve tried different Baudrates like 250000 and 152000. I use Windows 10 on all my computers. I tried changing COM ports, nothing changed. Changed computer too, didn’t work there either.

    #46602

    Teo Nordström
    Participant

    Extra info – I removed the Ramps and exposed the Mega 2560. When plugged into the computer one green light (ON) and one yellow (L) lights up and stays lit. When uploading RX blinks once but not more than that. Nothing happens when I press reset.

    #46603

    John
    Participant

    I’m sure you’ve tried this before but just in case…  Have you tried flashing it straight after a computer restart?  Most of the time, if a program is using up your com ports, they will be freed up after a restart, unless there’s a program in your startup and takes over your port as soon as you reboot.

    #46606

    Ryan
    Keymaster

    I agree with John. The LED’s have no significance. Windows 10 should not have any issues but to hear you are on COM 10 leads me to believe something is fishy with your computer. Do you have another you can try?

    #46607

    Teo Nordström
    Participant

    I tried doing what John said, but to no avail. I changed to COM 2, and I have tried on two different Computers. Getting late here, so I will get back to googling tomorrow.

    #46609

    Ryan
    Keymaster

    You have to use the correct com port, you can look in the device manager to know for sure, what I am getting at is what the heck is taking up the other 7 or so com ports? Windows for me only usually reserves com1 and com2.

    What exactly did you  try on the other two computers? Can you give me the exact steps you are using, I think you might be missing a step.

    #46628

    Teo Nordström
    Participant

    Okay, so my steps were: install Arduino and Repetier Host, change settings exectly like the pictures on your pics in the rh tutorial, try connectinf, no signal, try a bunch of  baud rates, check the com port in device manager, still no signal, open arduino, change board, processor and COM port, load your marlin software, upload, after saying upload for a while I get the error message, try a couple things (with/without external power, reset button, changing settings) I do think that is all steps i take 🙂

    #46629

    Just try with another Arduino, sometimes those things just die for no apparent reason.

    #46630

    Teo Nordström
    Participant

    I do not have Another arduino and I cannot afford one right now.

    #46635

    Teo Nordström
    Participant

    Well, I would like to try fixing this board, but if I have to buy a new one I have found one that is cheap (around 20 dollars) but it isn’t a real arduino, only an “Arduino Mega Compitable ATMega2560 16A R3”. Would this work or are there any downsides? It probably is an issue with the Arduino as it doesn’t work both when the ramps is plugged in and when it’s not.

    #46689

    Bill
    Participant

    Some (most) of the cheaper boards use a different chip for the USB connection. They require a different driver and don’t look the same to Device Manager.

    With Device Manager open and the COM ports expanded, unplug the Arduino and see which port disappears. Plug it back in and verify it’s the same port that reappears. Windows keeps track of all the different COM devices you use, and reserves the COM number for each so it’ll be the same the next time you plug that one back in. That’s how you can end up with a high COM number.

    Now that you know for sure which COM is the Arduino, set Repetier-Host to use that port and set the speed to 250000. Ask R-H to connect and see if it responds by saying it’s connected. If it doesn’t connect it could be a bad USB cable, a bad Arduino or a bad USB port. Most likely is the cable.

    If you have a corrupted image on the Arduino launch the IDE, set the port and speed and try reflashing again.

    I’m betting it’s the cable… 🙂

    #46700

    I’ve bought and used maybe 30 Arduino (Uno, mega, pro mini, whatever), never had a “real” one.

    If they work the first time (which is the case 95 times out of 100), then they are pretty reliable and work fine.

    Just buy the cheapest you can find, no big deal.

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