After replacing the X-axis guide rail, On the main interface, click "Tools"icon ➜ "Control"icon ➜ "Module Calibration" ➜ "Position Calibration." The machine will automatically probe and stop near the calibration module. Use the interface's distance units and X/Y axis movement directions to adjust the nozzle to the center position of the calibration module. Once done, click "Save" and then perform the automatic leveling process again and manually adjust the Z-axis offset during printing to avoid printing in the air.
● M2.0 Allen wrench
● M2.5 Allen wrench
Before replacing the X-axis guide rail, make sure to turn off the printer and disconnect the power to ensure safe operation.
Use an M2.5 Allen wrench to unscrew the four screws securing the print head, and set the print head aside.
①Rotate the red knob on the X-axis belt tensioner counterclockwise and remove it.
②Use an M2.0 Allen wrench to unscrew the two screws securing the X-axis belt tensioner and remove the outer casing of the tensioner.
③Disconnect the wiring of the X-axis limit switch on the other end of the aluminum profile.
④Use an M2.5 Allen wrench to unscrew the single screw securing the X-axis limit cover and remove the X-axis limit cover.
① With your hand, follow the belt from the loose part to the sheet metal fixing point, and then remove it.
② Remove the tensioner pulley from the left side and set it aside for later installation.
③ Pull out the belt from the X-axis profile.Note:That due to inconsistent internal spacing of the profile, the belt's copper buckle may get stuck. In such cases, please move the stuck copper buckle from the direction of the larger space to ensure smooth removal of the belt.
①Slide the print head bracket to the right.
②Turn the printer to the back and use an M2.5 Allen wrench to unscrew the four screws securing the X-axis guide rail. Remove the X-axis guide rail that needs replacement.
①Take out the new X-axis guide rail and install it on the Z-axis V-slot wheel on both sides. (Ensure that the thicker side of the guide rail is facing upward during installation).
②Remove the screws from the previously removed X-axis guide rail, align them with the screw holes, and secure the X-axis guide rail. In this step, the screws do not need to be tightened; just pre-lock them.
③Ensure that the position of the X-axis guide rail matches the adhesive patches on the Z-axis V-slot wheel on both sides, then tighten the previously pre-locked screws one by one.
④Slide the print head bracket from right to left.
①Take out the belt previously removed. First, fasten one end of the belt to the left side of the metal sheet.
②Route the belt around the X-axis motor, ensuring that the belt's teeth align with the teeth on the motor's synchronous pulley.
③Thread the other end of the belt through the X-axis profile, ensuring it passes smoothly through the profile.
④Pass the other end of the belt through the tensioner pulley, ensuring the belt is correctly installed on the pulley.
⑤Finally, fasten the other end of the belt to the right side of the metal sheet, ensuring the belt is securely fixed in place.
① Install the tensioner housing, ensuring that the tensioner pulley fits inside the housing, and use an M2.0 Allen wrench to tighten the 2 screws securing the tensioner housing.
② Install the red knob by rotating it clockwise onto the tensioner.
③ Install the X-axis limit cover, use an M2.5 Allen wrench to tighten the 1 screw securing the X-axis limit cover.
④ Connect the wiring of the X-axis limit switch to the corresponding plug connector.
Use an M2.5 Allen wrench to tighten the four screws securing the print head.
Turn the X-axis tensioner knob clockwise until it is tight, and then turn it counterclockwise one full turn.
After replacement, please level your printer.
We recommend checking the X-axis dual-axis guide rails every month to ensure they are clean and free of foreign objects. This helps maintain the smooth operation of the guide rails and ensures the stability and accuracy of the machine.
Turn off the machine and disconnect the power. Using a lint-free cloth or a soft brush, check if there is dust, debris, or other foreign objects adhering to the rail surface. If there are any, gently remove them. Check the smoothness of the rail's movement path, ensuring there is no sticking or resistance. Use your hand to gently move the X-axis and observe the motion of the rails.
If you find a significant amount of dust or debris on the rails, you can follow these cleaning steps:
Use an air gun or a hairdryer to blow away the dust on the rail surface. If using an air gun, lightly press the trigger, being careful not to blow excessively to avoid blowing dust into other components or damaging electronic parts.
Apply a small amount of lubricating grease to the core on both sides of the X-axis rails. Then, gently move the corresponding print head and heated bed to distribute the grease evenly on the rails.
After completing the maintenance, gently push and pull the heated bed and print head by hand to check for any sticking or wobbling. If present, refer to the leveling guide of the Kobra 2 video to readjust the hexagonal eccentric spacers.
Reconnect the power and turn on the machine. Perform a test print run, observing smooth movement of the X-axis without any abnormal resistance or noise. Ensure the cleanliness and proper functioning of the rails. If you still have any issues, it is recommended that you create an after-sales work order to feed back the process and results of the previous inspection to the after-sales engineer. After-sales engineers will help you solve the problem.
If the above steps do not provide assistance or if you encounter any other issues during subsequent use, we recommend that you create a support ticket. The after-sales engineers will assist you in finding a solution to the problem(Reply time :1 working day)
Please click this link to submit your ticket: