Rumba HE1 Lug problem

Discussion in 'Build Help' started by Jaysen DAYDREAMn, Jun 27, 2016.

  1. Jaysen DAYDREAMn

    Jaysen DAYDREAMn Well-Known Member

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    Hi guys,

    On my Rumba, the HE1 lug - side will not tighten on the lead to the hot end. I removed the lead and the lug still does not tighten down even without the lead.

    Any ideas on work around or a fix?

    much appreciate the input and help.

    Man... I don't want to pull this thing apart. :/
     
  2. elmoret

    elmoret Administrator

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    Could flash the firmware to use HE0 and HE2 instead. If it were the + terminal you could just grab +24v from somewhere else, but the PWM is on the low side (negative terminal).
     
  3. Jaysen DAYDREAMn

    Jaysen DAYDREAMn Well-Known Member

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    HE0 is used by the other hot end. :( this is on a dual 1.1. I want to finish this build already. lol
     
  4. Hans C.

    Hans C. Well-Known Member

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    No kidding you don't want to tear the thing apart! Could it be that a speck of something has found its way into the connector, preventing the screw from engaging? If so, a needle (or dental pick, whatever) might wangle it out.

    I'm not sure why you need to use the lugs instead of the 4-pronged connector on the board. If I had to choose between buying a crimper and some Molex connectors, and waiting for a replacement if the Rumba is defective--plus redoing from start--I know which I'd pick.
     
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  5. Jaysen DAYDREAMn

    Jaysen DAYDREAMn Well-Known Member

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    Hans, what molex connector? That is a fantastic idea. omg...
     
  6. elmoret

    elmoret Administrator

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    That's my point, HE0 and HE2 - total of 2 hotends.
     
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  7. Jaysen DAYDREAMn

    Jaysen DAYDREAMn Well-Known Member

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    Elmorat, Sorry I missed that. how hard is that to change in the firmware? will it have any other impact on use? each time I upgrade firmware I am guessing I would have to make that change again.
     
  8. Hans C.

    Hans C. Well-Known Member

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    Tried to find a suitable image. This: http://wiki.e3d-online.com/wiki/File:Dual_pt100-amp.jpg shows Molex connectors (the black plastic thingies on the end of each leg of the wire). I'm still not sure why you need to use the lugs, since the extruder motor cables should already have the appropriate connectors, which plug straight into the appropriate pins. Like this:
     

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  9. elmoret

    elmoret Administrator

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    What 4 pin connector?
     
  10. elmoret

    elmoret Administrator

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    Those are stepper connections, not heaters.
     
  11. elmoret

    elmoret Administrator

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    File: pins_RUMBA.h

    Change

    #define HEATER_1_PIN 3
    to
    #define HEATER_1_PIN 6

    and

    #define HEATER_2_PIN 6
    to
    #define HEATER_2_PIN 3
     
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  12. Hans C.

    Hans C. Well-Known Member

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    I had the feeling I didn't quite understand the problem, and it turns out I was right. As Roseanne Roseannadanna (or was it Emily Litella?) used to say, "Never mind."
     
  13. Jaysen DAYDREAMn

    Jaysen DAYDREAMn Well-Known Member

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    awesome thank you so much!
     
  14. Hans C.

    Hans C. Well-Known Member

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    Sorry about the confusion. I must have been having a 'slow in the head' day--happens more and more often nowadays--but I'm glad it was a simple fix. :cool:
     
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  15. Col.N

    Col.N Active Member

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    I had this problem too. I desoldered the terminal connector block and also the HE2 block and swapped them. Still to fully commission the printer so hopefully I don't find an issue with the rumba board, not sure wether E3D would honour any warranty as I've taken a soldering iron to it.
     
  16. Jaysen DAYDREAMn

    Jaysen DAYDREAMn Well-Known Member

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    I did not solder mine. I moved to h2 and will adjust the code as suggested above. I am considering asking for a new rumba as the lugs obviously are failing.
     

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