Diagnostic group
Buy-or-wait checks
Use these before buying gear. Each page tells you what proof would justify a dryer, plate, nozzle, or maintenance part.
3 diagnostic pages First test Run the no-purchase branch first. Stop after one useful signal
Start here
Open the page that matches your evidence most closely.
Buy-or-wait checks Brass vs Hardened Nozzle Extrude into free air, then print the single-wall flow box. Buy-or-wait checks Dry Box vs Filament Dryer Print the two-tower test and lower temperature 5 C. Buy-or-wait checks PEI Plate Cleaning Guide Run the five-patch first-layer test after washing the plate.
Brass vs Hardened Nozzle
Choose brass or hardened steel nozzles based on abrasive filament use, wear evidence, heat transfer, and print quality tradeoffs.
PLA, PETG, TPU, Nylon, PA-CF, AMS storageDry Box vs Filament Dryer
Use one before/after spool test to choose an active filament dryer, dry box, both, or no purchase yet for PETG, TPU, Nylon, and PLA stringing.
Smooth PEI, textured PEI, PLA, PETG, ASAPEI Plate Cleaning Guide
Diagnose PEI bed adhesion problems before buying a new plate: wash, IPA, release layer, or replacement sheet.