Hi

A couple of days ago the hotend wouldn’t heat up and i got a couple of errorcodes/warnings in the display. The bed heats up just fine, so i ordered a new hotend parts (heater, thermistor and a new aluminum block). Changed all of this, but still the same error. I can se that the thermistor works because it changes values in the display when touching the thermistor-end. Any good ideas why the heater doesn’t heat?

  • UncleStewart@sh.itjust.worksOPEnglish
    3·
    4 months ago

    I’m a totally noob in the 3D printing scene. My brother has a Biqu B1 and I’ve printed some small things on his printer. Found a used Biqu B1 for sale for about $80. Yeah, not good research from my side… But, I’ve printed a well printed fucktopus before it died…

    • morbidcactusEnglish
      3·
      4 months ago

      Honestly $80 sounds like an absolute bargain, you straight up can’t build one yourself for that price, a mainboard and like 2-3 steppers would go over that and everything I’ve seen about that printer says it’s a very capable, budget friendly option. It looks like that’s using a btt mainboard which I totally swear by, straight up shorted a fan header on an octopus pro and it’s still chugging along just fine, anecdotally they’re pretty hard to kill.

      I’d totally check your wiring before replacing a board, a break or bad crimp could totally be your culprit here, and those are a heck of a lot less work to remedy, thermal protection does totally get tripped if there’s an intermittent fault with the thermistor (including cabling), I had it happen on a prusa where it’d kick out but not have anything obvious temp wise on the display, only noticeable in a temp plot.

      • UncleStewart@sh.itjust.worksOPEnglish
        2·
        4 months ago

        The thermistor temperature reacts to me touching the thermistor-end. This shows in the display- So i believe this is not the problem here…

        • morbidcactusEnglish
          2·
          4 months ago

          Fair, a wire break can be annoying though, often they’re intermittent, and the display often doesn’t respond fast enough to show that, but thermal protection will.

          I’d totally consider taking a look at the connectors to the board for the heater cartridge, see if there’s good contact being made, check for any signs of things like scorching check end-end continuity. Looking at the schematics for that mainboard Btt skr 1.4 it looks like there are LEDs on all of the MOSFETs, it will give you a visual indicator of the board state, to help narrow down your troubleshooting.

          • UncleStewart@sh.itjust.worksOPEnglish
            1·
            4 months ago

            Thanks for the links. Can’t see any scorching, and everything I’ve measured seems OK. If there are LED’s on the mainboard, i don’t know how to light them. As of now there are no lights on the motherboard, but everything beyond that heater works…

    • WordBox@lemmy.worldEnglish
      2·
      3 months ago

      $80 makes it reasonable. At normal MSRP… Ender.

      Good luck and make upgrades slowly and as needed.