Octoprint and Creality CR-10S connection issue

VanGoghComplex

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Hey guys and gals! I'm very very new to 3D printing, and am trying to get my CR-10S set up with Octoprint. Have hit a snag though.

1.) I got the Octoprint image installed on my Pi. I can connect to it. I installed a TouchUI plugin, as my primary interface is an old smartphone I've dedicated to the print desk.

2.) I assemble my printer, connect the Pi, and connect Octoprint using the default serial settings. It works; I'm able to manually move all the axes through the Octoprint UI.

3.) Realizing I have no models on the Octopi yet, but wanting to use a test model, I grab the included SD card from Creality and plug it into the printer. (I found out later that this doesn't work - read on.) Seeing that it doesn't recognize the SD card, fiddling with settings, I start the "Init. SD" option on the CR-10S display.

4.) The machine stops and displays "KILLED." on the status portion of the display. I turn it off, unplugging the Pi, and turn it back on again, the error is cleared.

5.) However, now whenever I attempt to start the serial connection from Octoprint, the printer display "resets" (showing the Creality logo momentarily) and shows "KILLED." as soon as it comes back to the main status screen. Octoprint reports that the printer has errored and thus has disconnected.

The printer still works - I can print from the SD card (now that I know it has to be inserted before starting up), just can't connect Octoprint anymore. Does anyone have any insight or notions about what might have gone wrong here?

Thanks in advance!
 

XViper

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This is odd, I assume the SD card that runs PI might have been corrupted. I'd try a different SD card and put the image back on there. Also check if you have enough juice running through the Pi. My adapter went bad and the Pi acted really weird.
 

VanGoghComplex

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XViper , thanks for the suggestion.

I actually got this figured out - the machine would error any time I tried to connect if there was an SD card in the CR-10S control module. After removing the SD card from the printer, Octoprint connects with no issue and I've successfully run a few prints.
 

PCMusicGuy

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Glad you got it sorted. I have been using OctoPi for about the last 7 months on my CR-10S. How are you liking the machine so far?
 

VanGoghComplex

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Glad you got it sorted. I have been using OctoPi for about the last 7 months on my CR-10S. How are you liking the machine so far?
I've got mixed feelings, but I don't think those are really the fault of the printer. I bought a cheap printer that has a community reputation for being not fantastic out of the box, but can become among the best with a number of upgrades - and now, against all reason, I find myself frustrated with all the fiddling I'm needing to do.

The only issue I'm still really fighting is that the Y-axis belt will skip a tooth, ruining a print. I'm still hunting for the correct belt tension on that axis. People say it should twang like a guitar string, but I guess I'm a little leary of tightening it that much. It just looks and feels too chintzy to me, for that kind of tension.

Otherwise I'm happy. I haven't printed much other than upgraded parts for the printer, but not for lack of trying. I'd say at this point I'm at a 50% success rate between bed adhesion problems (mostly sorted since I updated to Marlin 1.1.9 and used mesh levelling) and belt slips.
 
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I've got mixed feelings, but I don't think those are really the fault of the printer. I bought a cheap printer that has a community reputation for being not fantastic out of the box, but can become among the best with a number of upgrades - and now, against all reason, I find myself frustrated with all the fiddling I'm needing to do.

The only issue I'm still really fighting is that the Y-axis belt will skip a tooth, ruining a print. I'm still hunting for the correct belt tension on that axis. People say it should twang like a guitar string, but I guess I'm a little leary of tightening it that much. It just looks and feels too chintzy to me, for that kind of tension.

Otherwise I'm happy. I haven't printed much other than upgraded parts for the printer, but not for lack of trying. I'd say at this point I'm at a 50% success rate between bed adhesion problems (mostly sorted since I updated to Marlin 1.1.9 and used mesh levelling) and belt slips.

Tighten the belt on up. The bearings in the stepper will handle it. The bigger question is why the belt is slipping. Are you getting a layer shift or is the print head hitting the print and sticking? Are you going straight onto the glass? If so, purple glue stick that biotch up.
 

VanGoghComplex

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Tighten the belt on up. The bearings in the stepper will handle it. The bigger question is why the belt is slipping. Are you getting a layer shift or is the print head hitting the print and sticking? Are you going straight onto the glass? If so, purple glue stick that biotch up.
The belt is definitely skipping a tooth. There's a distinct, uniform 2mm layer shift whenever it happens.

I'm printing onto bare glass, but between meticulous cleaning and mesh bed levelling after my firmware update, my adhesion problems are pretty much gone.

I really do think at this point that I just faked myself out. After the first layer shift issue, I went to tighten the belt with the stock end bracket and immediately thought "This sorry excuse for a tensioner sucks." Printed a new one straight away, but never really had a good idea of exactly how tight I could safely set it. I was nervous about stringing it too tight and so tried several prints with the belt still undertensioned.
 
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The belt is definitely skipping a tooth. There's a distinct, uniform 2mm layer shift whenever it happens.

I'm printing onto bare glass, but between meticulous cleaning and mesh bed levelling after my firmware update, my adhesion problems are pretty much gone.

I really do think at this point that I just faked myself out. After the first layer shift issue, I went to tighten the belt with the stock end bracket and immediately thought "This sorry excuse for a tensioner sucks." Printed a new one straight away, but never really had a good idea of exactly how tight I could safely set it. I was nervous about stringing it too tight and so tried several prints with the belt still undertensioned.
Really stupid question, but did you make sure the belt isn't missing a tooth as well?
 

VanGoghComplex

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Really stupid question, but did you make sure the belt isn't missing a tooth as well?
Guess I haven't examined it that closely. If it was though, I'd guess the layer shift would be more common. When I was getting it before, it'd be maybe once over the course of an 8-hour print.
 
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Guess I haven't examined it that closely. If it was though, I'd guess the layer shift would be more common. When I was getting it before, it'd be maybe once over the course of an 8-hour print.
I had a problem with my pi power supply not being stable and was causing print issues several hours in. If something else fixes it great, but if not, do try swapping it out.
 
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