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Unresolved Apparently the bed doesn't like 110c

Discussion in 'Troubleshooting' started by Yanez, Jan 8, 2015.

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  1. Yanez

    Yanez Member

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    My bed didn't want to heat up so I lifted up the bed and found this nice little surprise[​IMG]
    [​IMG]
     
    #1 Yanez, Jan 8, 2015
  2. Mike Kelly

    Mike Kelly Volunteer

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    No that's why the firmware is limited to 85C. I always always always advise people to cut off that connector if they're modifying the firmware
     
    #2 Mike Kelly, Jan 8, 2015
  3. Yanez

    Yanez Member

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    So how do all the guys that recommend running abs at 100 to 110 do it?
     
    #3 Yanez, Jan 8, 2015
  4. Mike Kelly

    Mike Kelly Volunteer

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    110 is just for the first layer to help with adhesion, which isn't necessary if you use something like ABS slurry.

    After the first layer you really only want 80C

    That 100-110C thing is fuzzy at best and by absolutely no means a requirement.


    Cut off the connector and solder the wires together if you want to run at 110C
     
    #4 Mike Kelly, Jan 8, 2015
  5. Yanez

    Yanez Member

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    Ah for the first layer. My bad, I'm getting some of the bullet connectors that I use for my RC's ready as we speak. Thank you for your kind wisdom good sir.
     
    #5 Yanez, Jan 8, 2015
  6. Mike Kelly

    Mike Kelly Volunteer

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    Just be sure it's rated for around 15A
     
    #6 Mike Kelly, Jan 8, 2015
  7. Yanez

    Yanez Member

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    Yeah 3.5 mm bullet connectors supposably 40 amp
     
    #7 Yanez, Jan 8, 2015
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  8. Mike Glass

    Mike Glass Active Member

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    Damn, 110 thats crazy, I mostly run 60-80 with abs and never have problems with sticking, at least when I have a good build up of hairspray or glue stick, slurry works good too, but easier with hairspray.
     
    #8 Mike Glass, Jan 8, 2015
  9. Yanez

    Yanez Member

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    Well I screwed something up real good lol. The bed still when heat up so I cracked open the bottom and this guy fell out time to learn some more I guess. [​IMG]
    [​IMG]
     
    #9 Yanez, Jan 8, 2015
  10. Ziggy

    Ziggy Moderator
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    Have to ask why the polyfuse is not protecting against this kind of excessive current? Has the polyfuse type been changed on the recent models?
     
    #10 Ziggy, Jan 8, 2015
  11. Robert Choban

    Robert Choban Active Member

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    I have had the exact same problem, but I'm running PLA with bed temp no higher that 50c.
     
    #11 Robert Choban, Jan 9, 2015
  12. Mike Kelly

    Mike Kelly Volunteer

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    The polyfuse has been upgraded to a MFR1400. When the connector broke it shorted out and caused the mosfet to overheat (i'm guessing)
     
    #12 Mike Kelly, Jan 9, 2015
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  13. Ziggy

    Ziggy Moderator
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    Would be good to do some investigation to understand why/how these failures have happened. It looks like this Ramps is probably not repairable - so maybe it could be returned?
     
    #13 Ziggy, Jan 10, 2015
  14. Mike Kelly

    Mike Kelly Volunteer

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    He voided the warranty so probably not
     
    #14 Mike Kelly, Jan 10, 2015
  15. Ben R

    Ben R Active Member

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    Crazy..
    That said, I find varying opinions across the net, but I have had zero problems since day one with hair spray and 60-80 degrees. Thing doesn;t want to heat past there anyway.
    But I have an enclosure. Maybe thats the trick?
     
    #15 Ben R, Jan 10, 2015
  16. Mike Kelly

    Mike Kelly Volunteer

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    110C is suggested ONLY for the first layer, and is by no means required. The misinformation on this is pretty bad.

    Keeping a higher ambient is better than running a hot bed. So yes the enclosure would really help
     
    #16 Mike Kelly, Jan 10, 2015
  17. Mike Glass

    Mike Glass Active Member

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    I think ambient temp has some effect, but I run mine in a room that is always 66f and I run the bed and extruder cooler than most, specially smaller parts, as long as you have a good build up of slurry or hairspray and run a small brim.
     
    #17 Mike Glass, Jan 10, 2015
  18. Yanez

    Yanez Member

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    Sorry guys we were in the hospital receiving our new son.[​IMG] yeah I voided my warranty I think as soon as I got it. [​IMG]. I ordered a new ramps which I think was under 20 bucks from Amazon and should be here on Friday so no big deal. But the reason I run it a little hotter is because I'm trying to compensate for that draft I'm purposely introducing with that exhaust fan in the back.
     
    #18 Yanez, Jan 10, 2015
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  19. Mike Kelly

    Mike Kelly Volunteer

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    Congrats! But yeah the air draft will cause layer delamination and warping. You should consider heating that as well
     
    #19 Mike Kelly, Jan 10, 2015
  20. Yanez

    Yanez Member

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    Thank you friend. Yes once life start settling down a little bit I'll start digging back into it. One of my biggest concerns is trying to control a little bit of this what I assume is z ribbing. [​IMG]
     
    #20 Yanez, Jan 10, 2015
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