Cr-6 SE - USB connection



  • @roeland said in Cr-6 SE - USB connection:

    After I connected my desktop via a USB cable to the printer, BOTH THE PRINTER AND MY COMPUTER DIED. I have no idea how a USB cable connection could even do that, but it happened anyway. I've asked Creality support to help me and have sent my computer to a repair shop.

    I was running the firmware the printer was delivered with. Needless to say, I'm very unhappy at this moment... I was getting the hang of getting some nice prints and now this...

    My suggestion: Do NOT connect the printer via USB, unless Creality guarantees it is safe to do so.

    Mine did the same thing, on the main CR-6 board SMD Fuse F3 and SMD chip U9 were both burned.



  • @Stonedog03 said in Cr-6 SE - USB connection:

    There is another product that can prevent the printer from drawing power over the USB link from your raspberry pi (think octoprint) or computer:

    https://www.th3dstudio.com/product/power-blough-r-pi-usb-power-blocker/

    I ordered one today, so obviously I haven't tested this yet (the product just came back in stock). Hopefully they will get it out to me quickly and I can report back on how it works.

    So I received the "Power BLough" USB power blocker and it works as advertised. I am now able to power off the CR-6 with it still plugged into my USB port without it sucking power and lighting up the touch screen. Sucks that we have to add things to make it right, but this at least solves the issue.

    -Mike



  • There is another product that can prevent the printer from drawing power over the USB link from your raspberry pi (think octoprint) or computer:

    https://www.th3dstudio.com/product/power-blough-r-pi-usb-power-blocker/

    I ordered one today, so obviously I haven't tested this yet (the product just came back in stock). Hopefully they will get it out to me quickly and I can report back on how it works.



  • After I connected my desktop via a USB cable to the printer, BOTH THE PRINTER AND MY COMPUTER DIED. I have no idea how a USB cable connection could even do that, but it happened anyway. I've asked Creality support to help me and have sent my computer to a repair shop.

    I was running the firmware the printer was delivered with. Needless to say, I'm very unhappy at this moment... I was getting the hang of getting some nice prints and now this...

    My suggestion: Do NOT connect the printer via USB, unless Creality guarantees it is safe to do so.



  • @admin yet I think a filter between the USB port and the display can prevent a lot of questions and doubt. Why try to power the display. Put in a few diodes and you're golden.



  • I had my USB plugged in for about 10 seconds before I started seeing smoke from somewhere. When I went to pull it, it was hot. I haven't dared to plug it in again.



  • @Nigelh Same on Raspberry Pi 4 running OctoPrint.

    The screen backlighting keeps blinking and I hear a very unpleasant sound from the unit--I feel like the thing is going to explode!!!

    And unplugging the USB cable is not an acceptable fix!!! It is industry standard practice that USB cables to peripherals should not need to be unplugged, that's the whole convenience of USB connections.



  • Same issue here: https://youtu.be/AT99AK39XwQ
    I also have that annoying sound - this is how I initially noticed the issue.

    @admin, is that the official Creality position about this issue ? "You need to unplug the USB cable after shutting down"

    That is a not a solution for me. As @Nigelh is saying other printers are behaving OK.
    This is definitely a hardware issue.



  • Dear @Nigelh

    USB is a 5V power supply. It can be turned on only by connecting a USB printer, but it cannot provide power for the printer to work. You need to unplug the USB cable after shutting down.



  • Confirmed, same issue here. Mac.


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