¶ When to Calibrate
When the machine reports error 2710, it indicates a module abnormality.
1. Error: "Belt tension module strain gauge not calibrated abnormally". Calibration is needed.
2. Error: "Abnormal belt tension: mdl pull_num_error". If the structure appears normal after initial inspection, try calibrating to restore the module function.
¶ Calibration Tool
¶ Belt Auto-tension Module Calibration Tool
Since the automatic belt tensioning function requires calculating accurate tension values, when the belt tension is normal, a tool needs to be installed to apply a specific calibration force higher than the belt tension. Through data fitting, we can calculate the actual belt tension.
Please print the following belt auto-tensioning module calibration tool.
k2plus belt tension module calibration tool.rar
¶ Fluidd Web User Interface
Belt auto-tensioning calibration is completed by sending fixed commands to the CrealityOS system, which automatically calibrates after executing the commands.
Therefore, the following steps need to use the Fluidd interface:
Open a browser on your computer and obtain the printer's IP address from the printer's network interface
Enter the printer's IP address and the port number in the browser: :4408(e.g. 192.168.1.1:4408) to access the Fluidd window
Command line:
¶ Fluidd Calibration Steps
¶ Calibration Tool
Print out k2plus belt tension module calibration tool.rar
Note: When installing, be careful not to pull the belt forcefully to avoid slight deformation of the strain gauge
¶ Installation Tutorial
The tension tool needs to be inserted in the middle of the belt.
¶ Preparation
Confirm that the belt tension is within the correct range (7.5N±0.5N), if unable to measure, please ignore.
Adjust the extruder position to the rear nozzle wiper module.
Unlock the motors, you can click the motor unlock button on the screen,or send the M84 command in the Fluidd toolbar.
¶ Calibrate the right (X) automatic belt tension module
Copy and send the following commands in the Fluidd command line.
BELT_MDL_INFO MDL_NAME=mdlx
BELT_MDL_CALI MDL_NAME=mdlx DIR=0
BELT_MDL_CALI MDL_NAME=mdlx DIR=1 TEN=140Install the calibration tool on the right belt
Copy and send the following command in the Fluidd command line
BELT_MDL_CALI MDL_NAME=mdlx DIR=2 TEN=160Wait 10 seconds, remove the calibration tool; rotate the tool horizontally 90 degrees so that the longitudinal axis is parallel to the belt, then remove the tool
¶ Calibrate the left (Y) automatic belt tension module
Copy and send the following commands in the Fluidd command line.
BELT_MDL_INFO MDL_NAME=mdly
BELT_MDL_CALI MDL_NAME=mdly DIR=0
BELT_MDL_CALI MDL_NAME=mdly DIR=1 TEN=140Install the calibration tool on the left belt
Copy and send the following command in the Fluidd command line
BELT_MDL_CALI MDL_NAME=mdly DIR=2 TEN=160Wait 10 seconds, remove the calibration tool;
¶ Confirm if calibration succeeds
Copy and send the following commands in Fluidd
BELT_MDL_INFO MDL_NAME=mdlx
BELT_MDL_INFO MDL_NAME=mdlyWait for Fluidd to return values, check the following conditions:
The current_place value should be 0. If not 0, it indicates position calibration failed, possibly due to improper operation, recalibration is needed.
The difference between idl_adc and full_adc should be greater than 100,000. If not met, it indicates strain gauge calibration failed. If multiple calibrations are unsuccessful, check the belt tension and module screw installation:
If the difference is too small, the strain gauge sensitivity may be problematic, replace the strain gauge.
If the difference is close to 100,000, the belt may be loose, manually tighten the belt and retry.
If idl_adc or full_adc remains unchanged for a long time, it indicates module damage, replace the module circuit board and strain gauge.
The pull_num value should be within 140±8. If not within range, position calibration failed, recalibration is needed. If the second condition is met but pull_num is out of range, the belt may be loose, tighten it and retry.
¶ Re-run Input Shaping on the screen
Check Input Shaping on the screen, click calibrate, and confirm if it has recovered;
If there are no error messages during the process, it is considered recovered.