Your print failed. Lazarus brings it back.
Lazarus reconstructs a clean, safe resume file from your original G-code so you can continue a print after a failure — without guessing, without digging through thousands of lines, and without “re-slice and pray.”
What Lazarus does
Aligns your printer to the partial print and generates a guarded resume sequence to continue at the correct layer.
Why it’s different
Other “resume” ideas exist — this is the first one practical, safe, and fast enough to actually use in real life.
Value (immediately)
If the print is still stuck to the bed, it isn’t failed yet — only delayed. One recovery can pay for the year.
Even when things go sideways
Total loss of internal geometry? Toolhead snagged off path? If you can re-establish position safely, Lazarus can recover.
What the web app requires
- Partial print still adhered to the bed.
- Three inputs: original G-code, layer height, height of partial print (close is fine; Lazarus handles precision).
- Manual position control* (ability to tell the printer where it is).
Not all firmware gives you enough manual control. If you have open Klipper, you’re usually good. If you don’t, you’ve got 7 days to verify your workflow supports coordinate restore (and cancel if it doesn’t).
In plain English: the question isn’t “can you measure position?” — that part is easy.
The question is: can you inform the machine (e.g., Klipper SET_KINEMATIC_POSITION, Marlin G92)?
Videos will make this dead simple.
If you get stuck, don’t spiral — email support and we’ll tell you “yes/no” fast.