Accidentally unplugged mid print
Hi, I had a print on through the night and accidentally unplugged the power lead few hours before the print was meant to be done. I quickly plugged it back in and the print job is still on and at 78%. When I try to resume, it starts printing mid-air, no longer where it stopped. Is it possible to resume it and start again from where it stopped? Can I maybe modify the g code to start from 78%? This is my first longer print, so I hope this isn’t lost. Thank you.
The recovery process after a power cut works OK for clean, short, isolated events. If power is off for long enough for the part to cool it will usually detach from the plate and be unrecoverable. If the power stutters on and off several times in short succession and power fails again before the recovery process is complete the machine may get confused and the print fail. Likewise if power 'brownouts' and wavers up and down recovery can be interrupted.
By re-plugging the power cord do you mean that you simply reinserted the plug while it was switched on? If you fumbled even slightly then you may have caused a stuttering restart ...
I think you have lost this one. If it happens again switch off, replug and then switch on causing a clean restart.
Can I maybe modify the g code to start from 78%?
In theory, yes, but you would need to know exactly where within that 1% band to resume ... 1% of 12 hours is over 7 minutes of print head movements.
Your best bet is to measure the height of the printed part, delete that much from the original CAD design, re-slice, print just the top and glue together.
Cheerio,