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CANVAS Hub Troubleshooting

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Canvas Hub Plugin stuck at verifying palette 2 connection

First time trying to use my Palette 2s - I have Octoprint on Raspberry pi 3b+ - going through the first time setup I made sure the palette was connected fine as was the printer - sending the gcode from Canvas cloud was cool and worked fine sending it to Octoprint. But when trying to do the first print setup, Octoprint is\was stuck at a screen saying “verifying palette 2 connection before starting print” While I was trying to figure out what to do - the printed homed and started printing - even with the octo page still stuck at this same point, Screen shot attached.

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I couldn’t do the first time setup because I couldn’t control the pi anymore - so I heated the hotend and bed via the printers control panel and manually fed in the pla for the cleaning part - then fed in the pla from the palette. So it going ahead and printing while Octoprint is still in that same screen.

Any ideas why?

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so to resolve this stupid screen - I had to refresh it - and thank god it hasn’t come back since. One less screw up!

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Hey @razz0r, glad to hear this issue was resolved - it sounds like the Hub needed to reestablish its connection to your Palette. Please let us know if you continue to experience this issue in the future!

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I have the same problem but the Palette 2s Pro never even makes any filament to feed into the printer. If I click “Start Print” on the Palette and select my print file, it freezes until I reboot it.

I’ve tried restarting everything, disconnecting and reconnecting, sending a clear all to the palette from Octoprint (which works so I know they’re talking to each other). Nothing seems to work. Any help is appreciated.

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Hey Ben, are you starting the print on OctoPrint? If you are in connected mode (using a Hub), you should not have to start the print from the Palette screen - after you start the print on OctoPrint, Palette should say "Initializing" and then prompt you to load filament. Are you stuck on the "Initializing" screen?

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I'm starting the print from Octoprint. I've been printing just fine with my Palette for a couple of months and took a break for a few weeks. When I came back to it, now it's doing this "verifying palette 2 connection before starting print" thing. Previously, I would start from Octoprint and not have to touch the Palette to start the print just as you describe. Now, though, I start the print in Octoprint, immediately 2 things happen: 1. My printer starts warming up and 2. a grey screen pops up on Octoprint with a message "verifying palette 2 connection before starting print" with no buttons or any way to clear the message. And it just sits there forever until I refresh the page. Nothing happens on the Palette at all. When I refresh the page and go to the Palette plugin tab in octoprint, I see that it says "0 of 3 splices" so it's getting the message somehow but just never doing what it's supposed to do. And it's connected - I double checked before and after refreshing the page. Thanks for your help @alina !1!

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By the way, I also reset my Palette to factory settings and verified that it has the latest firmware. Same for Octoprint plugin.

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@ben Hm, since it sounds like everything was working correctly before, I think the issue is likely physical - can you try a different USB cable to connect your Hub to Palette? Have you updated everything on OctoPrint when prompted? Could you also share an OctoPrint log from a day that this error occurred (instructions here: mm3d.co/octoprint-logs)? You can send the log to alina@mosaicmfg.com if you have trouble attaching it here. Thanks!

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I figured it out. I have a rather long start GCODE (bed leveling, purging, etc.) that I recently moved from Cura slicer to Octoprint. When the GCODE is in the slicer, I have no problem with Palette. When it's in Octoprint, Octoprint runs the entire start GCODE before handing over control to the Palette. The error that pops up about connectivity is a red herring. it has nothing to do with connectivity, everything to do with how Octoprint handles GCODE. Anyway, it's working as expected now. Thank you for your help!

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Author avatar Chris Wilke will be eternally grateful.
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