Heater fails on start

This topic contains 8 replies, has 3 voices, and was last updated by Profile photo of Bradley F Bradley F 4 months, 3 weeks ago.

Viewing 9 posts - 1 through 9 (of 9 total)
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  • #28540
    Profile photo of Bradley F
    Bradley F
    Participant

    I’ve used my mpcnc for milling, vinyl cutting, and drawing, but when I hook up the print head, and tell it to preheat it fails.

    I get 12v (roughly) on the D10 output, but the heater never gets warm, and eventually times out (Heater failed to heat msg).

    Bought everything from here, no electrical or firmware mods.
    12v 6amp output on powersource (also got from here).

    Not using end stops

    Preheating via screen (not connected to pc).

    I’m assuming I did something wrong with the wiring?

    #28542
    Profile photo of Ryan
    Ryan
    Keymaster

    You should get a red led when the heater is on, do you?

    Either way, try plugging the heater into the D9 the fan port and turn the fan on to 255, see if it gets warm, don’t go too long though as there is no temp control.

    #28543
    Profile photo of Bradley F
    Bradley F
    Participant

    Yeh the red led turns on (wasn’t sure if that was bad or not, good to know that’s not bad lol).
    will try in D9 w/ fan setting, one sec.

    edit:
    video of it doing it
    https://goo.gl/photos/vY9ex1de8vFmR2Wv7

    #28546
    Profile photo of Bradley F
    Bradley F
    Participant

    ok, put the heater into D9, Switched fan to 255.
    got 12.8v from D9 and heater remained cold to the touch, screen never showed a change in temp either.

    #28608

    It’s likely to be a defective heater cartridge. If you have a multimeter you can check its resistance, it should be a few ohms. If the resistance is high or if you have infinite resistance, then just replace the heating element with a new one.

    #28619
    Profile photo of Bradley F
    Bradley F
    Participant

    I can’t get it to do anything w/ ohms =\

    #28620

    Well if you have no reading it is very likely that the heater is dead.
    Just buy another one and you should be fine.

    #28688
    Profile photo of Bradley F
    Bradley F
    Participant

    I ordered some replacement heaters….and just noticed I ordered ’12V 30W 6*20′ rather than 40W. (5 pack for $9)
    Will this make a big difference? Will they still work?

    They don’t come in until tomorrow,
    (If they won’t work, I’ll order the 12v 40w today and send the 30w back.)

    #28760
    Profile photo of Bradley F
    Bradley F
    Participant

    Update:
    Heating element was the problem after all.
    Replaced with some I found on amazon, and it’s printing (almost) perfectly now.

    I need to adjust the temps a bit, but after that it looks like it’s going to work just fine.

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