Power Interrupt Scenario that Didn't Work
I had a use case on the MK3 that I thought should have worked, and you could probably make it work, but didn't work. I have an MK3 and an MK2S and a friend with the MK2S. I printed the parts for my 2.5 upgrade kit on the MK3 and had a little PET left over, so I started printing the upgrade kit parts for my friend. Well I ran out of PET, but did not have the spool that came with my friends upgrade kit. So the printer kept the head bed warm waiting for filament to be refilled, so I turned it off. I was expecting the power failure routine to kick in when I turned it back on to allow me to continue my print, but it did not. Seems like a not uncommon use case where the power failure routine would be really useful.
Re: Power Interrupt Scenario that Didn't Work
The Power Panic feature only works when the power supply loses power. This does NOT include the power switch on the unit itself. You would have to pull the cord out of the wall. (It isn't recommended to pull the plug from the power supply since it could arc a bit and cause Power Panic to not trigger correctly.)
Re: Power Interrupt Scenario that Didn't Work
A safe way to manually trigger the power panic would be with a power strip or surge protector that has its own switch.
Re: Power Interrupt Scenario that Didn't Work
That is a classic case of RTFM
https://www.prusa3d.com/downloads/manual/prusa3d_manual_mk3_en.pdf
Re: Power Interrupt Scenario that Didn't Work
I guess add that to the list of ways power panic could be better. The switch should trigger it if it’s printing.
Re: Power Interrupt Scenario that Didn't Work
What would be better, I think, is to have a "hibernate" menu option that would use most of the power panic logic but shut the printer down in a more controlled manner. It could trigger a quick z-hop and retraction, move the head away from the print, turn off the heaters, then prompt the user to turn the printer off. When they turn it back on it'll give them a "Resume print?" prompt. It'd be far more predictable than trying to force a power failure state.
Being able to manually halt the print and resume it in a controlled manner later would be far better than trying to kludge power panic to do something it was never intended to do (I imagine you could end up with some nasty quality issues if the hot nozzle stops over the printed part, too). Also, this is something that could be added via firmware as opposed to adding additional electronics.
Re: Power Interrupt Scenario that Didn't Work
I guess add that to the list of ways power panic could be better. The switch should trigger it if it’s printing.
I don't think so. If I turn off the power switch on any electronic device, I expect a full reset. We are talking here about the MECHANICAL POWER SWITCH.
What you want is a "stand by" button.
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