Interrupted printing while using USB

[kingrayal 0]

On my Creality S1 I can pause and restart ( maybe even just restart) a print if I need to.

Using Cura is it possible to restart a print that has been interrupted by a power outage or USB failure?

[Dustin 193]

USB failure? I hope you are not referring to printing over USB cable, this isn't even recommended at all.

Also to answer the main question, No - it cant.

[Slashee_the_Cow 619]

It's also worth noting that pausing while printing can lead to subpar results, including warping, because your print won't be cooling evenly. How serious this effect is depends on what material you're using and how you long it's paused.

 

Also, while I'm not sure about the specific for other manufacturers, I know the while Creality printers do have power loss recovery when printing from SD, there are a couple of caveats:

1. They only save their progress at the start of each layer, meaning they might try and repeat parts they've already printed upon restarting.
2. After a power loss the position of the print head is considered untrusted (as it doesn't know whether it may have moved during the outage) so it will re-home at least the X and Y axes before resuming. These just use cheap mechanical switches, so you don't usually get the exact same position each time. This means you'll have a layer shift, where it will be printed slightly out of position compared to what's already been printed.

But as @Dustin said, printing over USB from your PC is a really bad idea, and the capability mostly exists for legacy reasons (used to be printers had basically no brains of their own so they couldn't read instructions from a memory card). These days it is useful if you want to set up a system like OctoPrint to be able to control the printer over a network, but for that you usually dedicate a computer to running it (using a Raspberry Pi is quite popular and it's what I do).