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Palette 3 does not detect the printer before starting a print

I was calibrating my printer using OctoPrint (since the Palette does not have a terminal feature) and while the Palette 3 was powered up I unplugged the USB cable from the Palette 3 to the printer and plugged in the USB cable from OctoPrint. I finished the calibration (setting the z-stop offset) and unplugged the USB cable from OctoPrint and plugged the USB cable from the Palette 3 back in.

I started my print and waited while it prepared the filament but when I went to load the extruder I noticed it had not heated up. I heated up the extruder, and the bed, but was unable to get the print started. I assume it was unable to reestablish the connection to the printer but it did not detect that before starting the print. At this point I had reset the Palette 3 and start all over.

It it possible to have the Palette 3 check that it can communicate with the printer before allowing us to start a print or have it try to reconnect to the printer when starting a print if it is not connected?

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HI @aordono that’s a lot of steps to see if the printer is connected, perhaps there is room for a status icon on the main display in a future release.

Embarrassingly it happened to me 2 times and there was never a warning or other indication, it just started making filament and even then did not detect the printer was not connected. It finally became clear that something was wrong when I hit start print and nothing happened - it just sat there for several minutes before I canceled the print.

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This is a good point. On the current UI for the home screen, the side panel will display icons for WiFi, Canvas and the printer connection. If the printer is disconnected, it will display as light grey and then once connected will change to a more solid color. I think some improvement for visibility can be done.

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Hi @rjs, from the home menu on Palette 3 if you go to Printers > Select Printer > Edit Connection, you’ll be able to see if the auto connect option was on or off.

If I recall correctly as well, Palette should also show a screen prompt to double check the USB connection for a .mcfx file early on (in the event that there was a disconnect).

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@aordono My P3P does not work the way you are saying. I checked printer icon you mentioned and it is always white whether the printer is connected or not:

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I then disconnected the printer and the color of the icon did not change.

Next I tried to print something with the printer still disconnected and it just started loading the filament and getting ready for the print, I canceled it and then checked the status page and it showed the printer was connected:

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The only time I get a warning is if the printer is not connected when I start the P3P and try to start a print. Once the P3P is up, if I disconnect the printer it does not seem to detect that the printer was disconnected.

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Author avatar Randy Savell will be eternally grateful.
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