STLBEAST workshop mode

Flow Rate and Extrusion Multiplier Calibration

Calibrate average extrusion without hiding clogs, incorrect Z offset, or hotend-capacity limits.

Start hereCalibrate flow only after the nozzle, filament path, temperature, and first layer are healthy. Use a repeatable test and small adjustments.

First safe actionRun the first safe check and change one variable at a time.

Proof targetA small representative test no longer shows the original symptom.

Problem, repair steps and target result for flow rate and extrusion multiplier calibration — Match the failed area to the visual before changing a setting.

Repair progress0 of 7 complete

Step 1 of 7

Confirm physical nozzle and slicer nozzle size.

Visual reference while completing step 1 of flow rate and extrusion multiplier calibration — Keep the problem and target visual open while you make this change.

Why this matters

Material diameter and melt behavior vary.

Setting or checkFlow/extrusion multiplier

Save per filament, not globally for every material.

Expected result

Wall and top surface are consistent.

Step 2 of 7

Dry the filament and clear any clog.

Visual reference while completing step 2 of flow rate and extrusion multiplier calibration — Keep the problem and target visual open while you make this change.

Why this matters

Wear or restriction changes output.

Setting or checkTop-surface flow

Tune after global flow.

Expected result

Dimensions improve.

Step 3 of 7

Use a stable temperature and conservative speed.

Visual reference while completing step 3 of flow rate and extrusion multiplier calibration — Keep the problem and target visual open while you make this change.

Why this matters

Single-wall tests can be misinterpreted.

Setting or checkFirst-layer flow

Keep separate from normal flow.

Expected result

No gaps or ridges.

Step 4 of 7

Print the slicer or printer maker’s recommended flow test.

Visual reference while completing step 4 of flow rate and extrusion multiplier calibration — Keep the problem and target visual open while you make this change.

Why this matters

Transient problems are not average extrusion.

Setting or checkPressure advance

Calibrate after average flow.

Expected result

Long print remains stable.

Step 5 of 7

Measure multiple locations with appropriate tools.

Visual reference while completing step 5 of flow rate and extrusion multiplier calibration — Keep the problem and target visual open while you make this change.

Why this matters

Material diameter and melt behavior vary.

Setting or checkFlow/extrusion multiplier

Save per filament, not globally for every material.

Expected result

Wall and top surface are consistent.

Step 6 of 7

Adjust extrusion multiplier/flow in small increments.

Visual reference while completing step 6 of flow rate and extrusion multiplier calibration — Keep the problem and target visual open while you make this change.

Why this matters

Wear or restriction changes output.

Setting or checkTop-surface flow

Tune after global flow.

Expected result

Dimensions improve.

Step 7 of 7

Verify with top surface, wall, and dimensional tests.

Visual reference while completing step 7 of flow rate and extrusion multiplier calibration — Keep the problem and target visual open while you make this change.

Why this matters

Single-wall tests can be misinterpreted.

Setting or checkFirst-layer flow

Keep separate from normal flow.

Expected result

No gaps or ridges.

Controlled test log

Change one variable, then record what happened

This keeps temperature, retraction, speed, mechanical, and material tests from blending together. The history stays private in this browser.

Open proof report →

No controlled tests logged yet. Record the first change before adjusting a second variable.

Do not repeat the full print yet

Prove the repair with a small test

Test modelSmall representative test print

Setup

Use the same printer, material, slicer and key settings as the failed model.

Pass condition

The original symptom is absent and the target feature is repeatable.

If it still fails

The symptom remains in the same location or stage.

Recheck visual diagnosis

Complete the repair steps, run the proof test, and record the result.

Only if the proof test still fails

Next strongest repair paths

Do not stack these changes. Open one related guide based on the evidence that remains.

Visual guide for 3d printer under-extrusion

Extrusion3D Printer Under-Extrusion

Open this related Extrusion guide when the first repair path does not fully explain the remaining symptom.

Open guide →

Visual guide for over-extrusion, blobs, and zits

ExtrusionOver-Extrusion, Blobs, and Zits

Open this related Extrusion guide when the first repair path does not fully explain the remaining symptom.

Open guide →

Visual guide for pressure advance / linear advance tuning

CalibrationPressure Advance / Linear Advance Tuning

Use this next when corners, seams or speed changes leave blobs or gaps.

Open guide →

Matched next step

Fix the first layer, then print something worth keeping.

Use the free calibration path, save the settings that worked, and explore the Characters & Creatures collection that includes Bed Leveling Gremlin.

View matched product See Characters & Creatures Collection Get useful updates Unlock complete tools