Machine Calibration

Heating PID Calibration Instructions

• PID calibration can optimize the stability and response speed of heater temperature control. The table below lists the calibration commands for different heaters. The TARGET parameter can be adjusted according to the actual printing temperature requirements.

Heater Type	Calibration Command	Description
Extruder	PID_CALIBRATE HEATER=extruder TARGET=245	Calibrate the main extruder, change TARGET to the commonly used printing temperature (e.g., PLA is typically 190–220°C)
Extruder 1	PID_CALIBRATE HEATER=extruder1 TARGET=245	If the device has a second extruder, use this command for calibration, and adjust the TARGET temperature
Heatbed	PID_CALIBRATE HEATER=heater_bed TARGET=245	Calibrate the heatbed, it is recommended to set TARGET to the actual printing temperature of the heatbed (e.g., ABS is about 90–110°C)
PTC Heater	PID_CALIBRATE HEATER=PTC TARGET=70	Calibrate the PTC-type heater, please set an appropriate TARGET temperature according to the material used

Tip: After calibration, be sure to run the command below to save the parameters, otherwise the calibration data will be lost after a restart.

SAVE_CONFIG

Extruder Calibration

Tool Preparation

To ensure the accuracy of the extruder calibration, please prepare the following tools in advance:

Tool	Description	Requirements
Vernier caliper or ruler	Used for measuring actual extrusion length	Accuracy no less than 0.01mm, range ≥150mm
Marker or transparent tape	Used to mark the filament	Clear and identifiable mark
Test Filament	Used for performing extrusion test	It is recommended to use PLA or PETG, with decent quality

📌 Tip: Using stable quality filament and precise measuring tools will yield more reliable calibration results.

Equipment Readiness

• Ensure the extruder is loaded with filament
• Heat the hotend to the recommended printing temperature of the filament
• Confirm the printer is in an operable state

2. Mark the Initial Position

1. Use the prepared marker to make a mark on the filament
2. Marking position: about 70mm from the extruder inlet
3. Use a digital caliper to accurately measure the distance from the mark to the extruder inlet
4. Record this value as the Initial Mark Distance

3. Perform Extrusion

• Enter the following commands sequentially in the printer console:

G91          ; Set to relative coordinate mode
G1 E50 F60   ; Extrude 50mm of filament at a speed of 60mm/min

Important Notes:

• The extrusion process takes about 50 seconds, please wait for it to complete
• Low-speed extrusion must be used, as high speed will increase pressure and affect the accuracy of results
• Do not use the "Extrude" button on the graphical interface, as it uses fast extrusion mode

4. Measurement and Calculation

1. After extrusion is complete, use the digital caliper to measure the new distance from the mark to the extruder inlet
2. Record this value as the Final Mark Distance
3. Calculate the actual extrusion length:

Actual extrusion length = Initial mark distance - Final mark distance

5. Calculate New rotation_distance

• Use the official formula for calculation:

New rotation_distance = Old rotation_distance * Actual extrusion length / Requested extrusion length

• Requested extrusion length: 50mm
• Round the result to three decimal places

Calculation Example:

• Old rotation_distance = 24.000
• Actual extrusion length = 48.5mm
• New rotation_distance = 24.000 * 48.5 / 50 = 23.280

6. Update Configuration File

1. Open the printer configuration file
2. Locate the [extruder] section
3. Modify the rotation_distance parameter to the newly calculated value
4. Save the configuration file and restart the firmware

7. Verify Calibration

• If the actual extruded length differs from the requested extrusion distance by more than 2mm, it is recommended to re-run the full calibration process
• Repeat calibration until the error is less than 1mm
• It is recommended to perform at least two calibrations to ensure stable results

Notes

• Avoid touching hot components during operation
• Keep the caliper perpendicular to the filament when measuring to ensure measurement accuracy
• Save and restart the firmware after each configuration change
• Do not move the printer or interfere with filament flow during calibration

After completing the calibration following this guide, your extruder will be able to extrude the required filament length more precisely, thereby improving print quality.

Z-Offset Calibration

• Updating

Model Not Vertical Calibration

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