What this guide helps fix
Use this guide when an Ender-style printer is inconsistent, hard to level, scraping the bed, under-extruding, clicking, shifting layers, or producing weak surfaces after a profile change.
Quick diagnosis checklist
- Confirm the frame is square and the gantry is not sagging on one side.
- Clean the build plate and inspect for worn or damaged surfaces.
- Check V-wheels for flat spots, over-tightening, or loose carriage movement.
- Inspect the Bowden tube or direct-drive path for gaps, heat damage, and grinding.
- Verify belts are snug, pulleys are tight, and the nozzle is not partially clogged.
Step-by-step fix order
- Clean the bed and run a slow first-layer test.
- Set Z-offset or bed screws until the first layer is smooth but not crushed.
- Check extrusion by printing a small calibration cube at conservative speed.
- Inspect the hotend for leaks around the nozzle and heat block.
- Reduce acceleration and speed if layer shifts or ringing appear.
- Save the profile only after a full small test print succeeds.
Settings and mechanical checks
| Check | What to look for | What to change first |
|---|---|---|
| Bed leveling | One side too high, one corner not sticking, or nozzle scraping only in one zone. | Level mechanically before relying on slicer compensation. |
| Extrusion path | Clicking, grinding, thin lines, or sudden under-extrusion. | Check temperature, clog, tube gap, and spool drag. |
| Motion system | Layer shift, wobble, ringing, or inconsistent walls. | Check belts, pulleys, V-wheels, and acceleration. |
STLBEAST rule: Change one thing at a time, run a small test print, and save the working profile before moving on.
When to use AI Doctor
Use AI Doctor when the symptom could be mechanical, slicer-based, and material-based at the same time. Include printer model, material, nozzle size, layer height, speed, bed type, and a clear photo of the failed print.