FDM Troubleshooting Tools
Start with what went wrong on the print. The FDM Desk troubleshooter covers 10 symptoms, with guided questions for 6 and quick checklists for the others.
Open the FDM print troubleshooter Select a symptom, answer the checks, and review the suggested causes.What the tool does
The guided paths cover stringing, warping, poor bed adhesion, under-extrusion, layer shifting and top-layer gaps. Other symptoms open a short checklist immediately. Choose the description that best matches the visible defect rather than starting with the setting you already suspect.
The result is an ordered list of possible causes and suggested checks. Confidence labels describe the guide's priorities for that answer path; they are not measured probabilities or a guarantee that a component is faulty. The tool cannot inspect the printer, read its firmware or identify the filament from a photograph.
Inputs and decision method
You supply a symptom and yes-or-no answers about the printer, material, settings or observed behavior. Keep the active printer profile and filament label nearby so you can check a value instead of guessing. If the question is about a condition you have not inspected, inspect it before answering.
Each answer selects the next question or a result in a fixed decision tree. There is no numerical formula, cost calculation or hidden quality score. The questions and results run in the browser, and the tool does not ask you to upload a model or sign in. Back one step lets you revise an answer; All symptoms returns to the starting list.
Worked example: threads between parts
Choose Stringing / oozing. The first question asks whether the filament is freshly dried or stored sealed with desiccant. Answering no leads to moisture as a likely contributor. That result gives you a condition to investigate before saving new retraction values; it does not establish that moisture is the only possible cause.
Answering yes continues to the retraction check and then to other settings. If the actual symptom is a strand hanging from an idle nozzle, read the oozing vs stringing diagnosis first. It helps distinguish startup residue from threads left during travel.
Worked example: corners lifting
Choose Warping / curling. The guided path first asks about the material, then checks the relevant environment or initial-layer conditions. A part that never bonded should also be compared with the first-layer adhesion guide, because immediate detachment and later corner lift need different checks.
After one change, repeat the same small print and compare the same area. Follow the printer, filament and plate manufacturers' limits when applying a suggested setting. Keep a note of the original value so you can return to it if the result does not improve.
Continue with the right guide
For setup, follow the first layer calibration order. For recurring mechanical symptoms, consult the maintenance routine alongside the machine's manual. If the required build volume or supported material is the limitation, compare the 2026 printer picks by budget.