Visible difference after power failure recovery (60 seconds).
Today we had some really strong storms roll through and I realized I plugged my Core ONE into the wrong port on my UPS.
I haven’t lost power in 10 years but today I lost power for about 60 seconds.
The printer did pull the nozzle away from the print - so that’s good.
When the power came back on it did recover - I had to pull some ooze from the nozzle as it went back to the print. No big deal.
Now I did expect to be able to tell where the power failed - perhaps a missing layer or defect or something. I didn’t expect the whole print to look visibly different post-recovery.
I’m including a couple of pictures. The print is still running so I haven’t taken them out yet.
Any ideas why it looks different after the recovery (not just at the recovery point, but everything printed after)?
Temps are the same before and after failure. Print speed didn’t change. It’s like it went from matte to glossy almost.
[It's a water squirt gun, in case you are wondering].
RE: Visible difference after power failure recovery (60 seconds).
Another closer picture.
RE: Visible difference after power failure recovery (60 seconds).
And to be clear - I'm not upset or complaining, just wondering why is all. If there is something I should do after a power recovery to help keep the print finish consistent - I'm all ears.
RE:
I think it's normal, as the printer needs to home again after rebooting, a 10th of a millimeter would be visible if the head doesn't perfectly homes as previously.
A power recovery will be visible on any printer IMO. :/
EDIT: Ok, I didn't read enough your post, as you seem to "complain" about the glossy finish. For that issue I don't know what would cause it sorry...
RE: Visible difference after power failure recovery (60 seconds).
I wonder whether the printer "forgot" to re-run some initialization commands in the G-Code, and maybe restarted with an incorrect chamber temperature?
Prusa must have logic in place to store and recover the correct heatbed and hotend temperature settings after a power panic. Maybe recovering the chamber temperature -- being a new feature on the Core One -- was overlooked or not implemented properly?
RE: Visible difference after power failure recovery (60 seconds).
Not complaining at all, just unsure why the difference exists is all.
Parts are all fine, even the one that is supposed to hold water.
I was just hoping someone might know why the surface finish changed is all.
RE: Visible difference after power failure recovery (60 seconds).
I was printing PLA so no chamber temperature set. It was only off for about 60 seconds so not really enough time to lose heat.
RE: Visible difference after power failure recovery (60 seconds).
in the time the power was off plus reboot time etc the extruder wasn't cooled so it may have "gone up" in temp, thus changing the output quality?
RE: Visible difference after power failure recovery (60 seconds).
in the time the power was off plus reboot time etc the extruder wasn't cooled so it may have "gone up" in temp, thus changing the output quality?
But it looks like the printer never came back to the original appearance, but staid in the mode it had assumed after the restart? If it were some initial settling of a temperature, I would expect that to come back to its setpoint after a couple of minutes max.
RE: Visible difference after power failure recovery (60 seconds).
in the time the power was off plus reboot time etc the extruder wasn't cooled so it may have "gone up" in temp, thus changing the output quality?
I only expected a difference for that layer, maybe two, not the rest of the print - that's the thing that's baffling for me.
I did double check the temperatures when it resumed, as this was my first power failure and resume of a print ever [since I started printing in ~2016].
RE: Visible difference after power failure recovery (60 seconds).
I guess it will remain a mystery. ¯\_(ツ)_/¯
RE: Visible difference after power failure recovery (60 seconds).
I guess it will remain a mystery. ¯\_(ツ)_/¯
Seems likely.. I sadly have absolutely no idea either. Really strange though!
RE: Visible difference after power failure recovery (60 seconds).
Matte or gloss appearance is determined by printing temperature. Glossy means properly melted filament. Matte means too cold. Which may be low print temperature or higher volumetric speed when the filament does not have a time to properly melt (slow down or higher temperature helps).
Why it changed after reset? Hard to guess. Seems like you were printing too cold and after reset it maybe reseted to some default temperature? But it should use the temperature from the gcode. ¯\_(ツ)_/¯
RE: Visible difference after power failure recovery (60 seconds).
Temperatures according to the display on the unit were the same before and after. That’s why it’s so strange. Speed was the same too.