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Pressure Advance / Linear Advance Tuning

Reduce corner bulges, seam blobs, and underfilled acceleration transitions after flow is calibrated.

Start herePressure advance compensates for changing nozzle pressure. Calibrate it after temperature and flow, using the printer firmware and slicer’s supported method.

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 pressure advance / linear advance tuning — Match the failed area to the visual before changing a setting.

Repair progress0 of 7 complete

Step 1 of 7

Calibrate temperature and average flow first.

Visual reference while completing step 1 of pressure advance / linear advance tuning — Keep the problem and target visual open while you make this change.

Why this matters

Compensation does not match material/hotend.

Setting or checkPressure advance value

Printer/firmware-specific; never copy blindly.

Expected result

Corners are sharp without gaps.

Step 2 of 7

Use the official firmware/slicer calibration pattern.

Visual reference while completing step 2 of pressure advance / linear advance tuning — Keep the problem and target visual open while you make this change.

Why this matters

PA cannot fix average extrusion.

Setting or checkAcceleration

Calibration should resemble actual profile.

Expected result

Line width remains stable through speed changes.

Step 3 of 7

Run at realistic speed and acceleration.

Visual reference while completing step 3 of pressure advance / linear advance tuning — Keep the problem and target visual open while you make this change.

Why this matters

Multiple pressure controls conflict.

Setting or checkRetraction

Review after PA, but do not eliminate necessary retraction automatically.

Expected result

Seams are reduced without restart under-extrusion.

Step 4 of 7

Choose the value from the clean transition region, not the visually thinnest line.

Visual reference while completing step 4 of pressure advance / linear advance tuning — Keep the problem and target visual open while you make this change.

Why this matters

Compression changes dynamic behavior.

Setting or checkPressure advance value

Printer/firmware-specific; never copy blindly.

Expected result

Value is repeatable.

Step 5 of 7

Verify corners, seams, and small features on a second model.

Visual reference while completing step 5 of pressure advance / linear advance tuning — Keep the problem and target visual open while you make this change.

Why this matters

Compensation does not match material/hotend.

Setting or checkAcceleration

Calibration should resemble actual profile.

Expected result

Corners are sharp without gaps.

Step 6 of 7

Retune after major nozzle, hotend, tube, or material changes.

Visual reference while completing step 6 of pressure advance / linear advance tuning — Keep the problem and target visual open while you make this change.

Why this matters

PA cannot fix average extrusion.

Setting or checkRetraction

Review after PA, but do not eliminate necessary retraction automatically.

Expected result

Line width remains stable through speed changes.

Step 7 of 7

Use caution with flexible materials and extreme values.

Visual reference while completing step 7 of pressure advance / linear advance tuning — Keep the problem and target visual open while you make this change.

Why this matters

Multiple pressure controls conflict.

Setting or checkPressure advance value

Printer/firmware-specific; never copy blindly.

Expected result

Seams are reduced without restart under-extrusion.

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 flow rate and extrusion multiplier calibration

CalibrationFlow Rate and Extrusion Multiplier Calibration

Use this next when the symptom changes with extrusion width or wall thickness.

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 ringing and ghosting fix

Print QualityRinging and Ghosting Fix

Use this next when the print is aligned but repeated echoes remain around edges.

Open guide →

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