Please follow the tutorial steps strictly. During this process, you can ignore any error code messages on the screen. But when you proceed with the automatic tensioning test "Input Shaping", you need to make sure there is no error code. If you encounter technical issues, please contact cs@creality.com
¶ Calibration Tool
¶ Belt Auto-tensioning 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.
K2 plus_belt_tension_module_calibration_tool
¶ 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 :4408 in the browser. (e.g. 192.168.1.1:4408) to access the Fluidd window
Command line:
¶ Fluidd Calibration Steps
¶ Calibration Tool
Print out K2 plus_belt_tension_module_calibration_tool
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 tensioning module
Copy and send the following commands in the Fluidd command line.
M84
BELT_MDL_CALI MDL_NAME=mdlx DIR=0
M400
BELT_MDL_INFO MDL_NAME=mdlx
BELT_MDL_CALI MDL_NAME=mdlx DIR=1 TEN=140
M400
BELT_MDL_INFO MDL_NAME=mdlxInstall 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=160
M400
BELT_MDL_INFO MDL_NAME=mdlx
When the command is successful, remove the calibration tool; rotate the tool horizontally 90 degrees so that the longitudinal axis is parallel to the belt, then remove the tool.
Copy and send the following commands in the Fluidd command line.
M84
BELT_MDL_CALI MDL_NAME=mdlx DIR=0
M400
BELT_MDL_INFO MDL_NAME=mdlx
¶ Calibrate the left (Y) automatic belt tensioning 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=160
M400
BELT_MDL_INFO MDL_NAME=mdly
When the command is successful, remove the calibration tool;
Copy and send the following commands in the Fluidd command line.
M84
BELT_MDL_CALI MDL_NAME=mdly DIR=0
M400
BELT_MDL_INFO MDL_NAME=mdly
¶ 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:
1. The current_place value should be 0. If not 0, it indicates position calibration failed, possibly due to improper operation, recalibration is needed.
2. 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.
3. 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 "Belt Calibration + Cutter caibration + Input Shaping" on the screen, click “start detecting”, and confirm if it has recovered;
If there are no error messages after input shaping operation, it is considered recovered.
