First-layer test
Confirm bed cleanliness, mesh and Z offset before tuning anything else.
Member unlock: Save results by plate and material.
Controlled tests · one variable at a time
Diagnostic Test Bench
Use the tests in order. Do not tune pressure advance, retraction or acceleration before first-layer, extrusion and temperature behavior are stable.
Recommended order
First layer → temperature → flow → retraction → pressure advance → resonance → bridge → dimensional fit.
Temperature test
Find a stable temperature range with good bonding and limited stringing.
Member unlock: Store best values per filament spool.
Flow and wall test
Check wall thickness and surface quality before adjusting dimensional compensation.
Member unlock: Calculate and save corrected extrusion multiplier.
Retraction and travel test
Separate moisture and heat effects from actual retraction needs.
Member unlock: Save direct-drive or Bowden-specific results.
Pressure advance test
Reduce corner bulges and improve line starts after flow is calibrated.
Member unlock: Track values by material and toolhead.
Ringing and resonance test
Identify acceleration or mechanical limits without hiding faults in slicer settings.
Member unlock: Save maximum reliable acceleration by printer.
Bridge and cooling test
Balance bridge speed, temperature and cooling.
Member unlock: Store bridge overrides by material.
Dimensional fit test
Confirm holes, pins and mating parts after flow and first-layer corrections.
Member unlock: Save fit compensation by printer and nozzle.