@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.

This is exactly what happened to me this last Thursday when I finally received my printer. After going through all the standard first tests, I went to preheat to print out a calibration cube for my first print. Printer reset at 45C on the hotbed temp, then would reset every time you attempted to do a pre-heat. I decided to hook it up to my computer since I didn't have a Pi ready, and figured I could verify if this was an issue with the printer or just the control screen. Plugged it in, turned to open the software and then notice smoke coming out at the plug on the printer. Got so hot it melted the end of the USB cable wrap. Pulled the power on the printer and the usb cable but it was too late. My computer motherboard is fried as well as the printer motherboard. I dearly wish I had found these posts and the cr6 subreddit prior to getting my printer, because I could have saved both of my devices. Now I'm currently out a brand new printer that I never even got to use as well as a recently purchased motherboard on a computer only a few months old.

At least, that is the only conclusion i have at this point.

I got my CR-6 in the mail today (woo). Unboxed it, hooked it all up, verified all the external connections were good. It turned on without issues, I was able to home all as well as auto-level calibrate.

So, I proceeded to load up an SD card with a calibration cube, loaded up the filament and even heated the hot-end to get it started. When i went to preheat for PLA, the bed got to 45 and then the printer reset. I thought it a fluke, so I tried again. This time, it just resets as soon as you hit preheat, and it does this for either preheat options.

So, I proceeded to make sure all the firmware on the board and the screen were good, no change. I finally decided to go ahead and hook it up to the computer, see if I could get a different result or at least some troubleshooting codes. I hooked it up, turned to bring up cura real quick and look back to see the USB smoking at the printer! I rushed to unplug power as well as the USB, by the time I turned back to the PC it was shutdown and wouldn't come back online. Brand new $150 board i installed only a couple weeks ago, down the tubes. Fortunately I had a spare to get back online at least. Printer seems to be shot too.

I'll be contacting Creality about this in the morning, but I wanted to put this story up there as a warning. I obviously have no concrete proof that the printer was the problem here..could have been the cable (which was brand new), or the USB port on the front side of my case (rarely used, but functional last time I used it).

I just got the replacement mobo in my CR-6 and I'm experiencing this behavior as well. Only it does it when I just attempt to preheat, or auto-level which kicks off hot-end preheat.

This issue is also what was in place with the previous motherboard, prior to it getting fried from the whole USB fiasco. Leads me to believe something else is at play to. I'm curious to know if this is related to the power switch problem as well.

I went to do a bed level and ran into the Homing Error 202 mentioned here. I cannot Z home at all without getting it. The optical sensor on the left seems to trigger before the extruder tip even gets close to the bed.

I tried the community edition firmware as well as reflashing the 2.0.1.3 release on the site but the issue persists.

Thought I would add this this thread. After having my first board fried because of trying to plug USB into my computer (fried my computer mobo too), I was sent a replacement. Version 4.5.2

Because I was untrusting of the port still, I even bought this after seeing others recommend it:
https://www.th3dstudio.com/product/power-blough-r-pi-usb-power-blocker/

Unfortunately, the second I tried to plug my octoprint pi up to the printer, using that USB power blocker, I was immediately greeted by smoke and melting plastic from the printer usb port. Fortunately this time I was keeping a hawks gaze on the plug and unplugged it immediately before anything got fried.

At this point, i won't trust the USB on this board. I've yet to actually get to print on mine since i recieved it in Sept, since the printer resets everytime I attempt to heat the bed. Support has been, unsurprisingly, silent.

Swapped my switch out. It wasn't burned but the issue still persists. @admin, can we get some feedback on this? Is this known issue? Loose connections to recheck specifically? This is way past rediculous.

I might try that. I ended up buying a new switch of amazon last night based on another thread recommendations of the type to get. I'll likely just do the swap out first, and see how it behaves. This is very frustrating. I've had this printer since end of Sept, but have yet to get to print anything on it because of issue after issue.

I just got the replacement mobo in my CR-6 and I'm experiencing this behavior as well. Only it does it when I just attempt to preheat, or auto-level which kicks off hot-end preheat.

This issue is also what was in place with the previous motherboard, prior to it getting fried from the whole USB fiasco. Leads me to believe something else is at play to. I'm curious to know if this is related to the power switch problem as well.

@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.

This is exactly what happened to me this last Thursday when I finally received my printer. After going through all the standard first tests, I went to preheat to print out a calibration cube for my first print. Printer reset at 45C on the hotbed temp, then would reset every time you attempted to do a pre-heat. I decided to hook it up to my computer since I didn't have a Pi ready, and figured I could verify if this was an issue with the printer or just the control screen. Plugged it in, turned to open the software and then notice smoke coming out at the plug on the printer. Got so hot it melted the end of the USB cable wrap. Pulled the power on the printer and the usb cable but it was too late. My computer motherboard is fried as well as the printer motherboard. I dearly wish I had found these posts and the cr6 subreddit prior to getting my printer, because I could have saved both of my devices. Now I'm currently out a brand new printer that I never even got to use as well as a recently purchased motherboard on a computer only a few months old.

At least, that is the only conclusion i have at this point.

I got my CR-6 in the mail today (woo). Unboxed it, hooked it all up, verified all the external connections were good. It turned on without issues, I was able to home all as well as auto-level calibrate.

So, I proceeded to load up an SD card with a calibration cube, loaded up the filament and even heated the hot-end to get it started. When i went to preheat for PLA, the bed got to 45 and then the printer reset. I thought it a fluke, so I tried again. This time, it just resets as soon as you hit preheat, and it does this for either preheat options.

So, I proceeded to make sure all the firmware on the board and the screen were good, no change. I finally decided to go ahead and hook it up to the computer, see if I could get a different result or at least some troubleshooting codes. I hooked it up, turned to bring up cura real quick and look back to see the USB smoking at the printer! I rushed to unplug power as well as the USB, by the time I turned back to the PC it was shutdown and wouldn't come back online. Brand new $150 board i installed only a couple weeks ago, down the tubes. Fortunately I had a spare to get back online at least. Printer seems to be shot too.

I'll be contacting Creality about this in the morning, but I wanted to put this story up there as a warning. I obviously have no concrete proof that the printer was the problem here..could have been the cable (which was brand new), or the USB port on the front side of my case (rarely used, but functional last time I used it).