GregValiant 1,455
I know that the USB Printing plugin works (as good as it can) with my Ender 3 Pro. There are a couple of things you can check.
USB Printing must be installed in the Cura MarketPlace.
You must have a fully functional USB cable (some are just for charging phones with no data capability).
You must have the correct USB-Serial drivers installed on the USB port of the computer. Some drivers only install to a specific USB port so you can only plug in to that one. Others are enabled and notice when you plug the printer in and will adjust to any USB port.
Start with the printer off and Cura closed. Plug the printer in to the computer and then start Cura.
Cura should "notice" the printer. The "Monitor" screen should populate with a couple of controls. After that happens you can use the arrow on the side of the slice button to change to "Print Via USB".
Printing via the SD card is much preferred. As @Smithy says, USB Printing has not been updated in years and isn't likely to be updated any time soon. Octoprint/RaspPI are an option if you really need remote printing.
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Smithy 1,146
You can only check it the USB printing plugin is installed an active.
But Cura is not made to print via USB, even if the functionally is there. It is not supported and there is no active development anymore.
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