About the Fiber Nozzle Calibration Test Print
The Fiber Nozzle Calibration Test Print is designed to tell you if your Fiber Nozzle is set too high or too low. If your Fiber Nozzle is not set correctly, it can cause stringing or groove marks in the finish of your part, among other issues.
The Fiber Nozzle Calibration Test Print is made up of a series of 0.025mm steps that show the height difference between the plastic nozzle and fiber nozzle. During the course of the print, the fiber nozzle is dragged over the steps at a constant height and leaves marks on the steps that it hits.
The steps on the test part are numbered to help show how accurately calibrated the Fiber Nozzle is. The steps increase in height from left to right, meaning that "Step -2" is the lowest and "Step 2" is the highest. A correctly calibrated Fiber Nozzle would first hit the part in the "Step 0" box. Because the fiber nozzle is dragged across the part at a constant height, if the nozzle hits "Step 0", it will also hit the taller steps to the right of it. Look for the lowest step that the fiber nozzle hits.
During this print the fiber nozzle drags across the part three times and pauses between each drag to let you see where the nozzle hit and adjust the fiber nozzle height. It may be easier to take the print bed out of the printer and hold it up to the light to see the marks on the steps better.
If you are experiencing routine fiber jams and printing with carbon fiber reinforcement, we recommend raising your fiber nozzle one step compared to the directions above, so that the drag mark begins on step one rather than step zero. This increased spacing will compensate for carbon fiber’s increased layer height.
Running the Fiber Nozzle Calibration Test Print from Your Printer
To run the Fiber Nozzle Calibration Test Print from your Printer:
- Clean your print bed and apply glue as shown in the picture below. Place your print bed into your printer.
- Press the menu button in the upper right corner of your printer's LCD touchscreen.
- Select the "Bed Level" tile from the available options.
- Select the "Adjust Fiber Nozzle Height" tile from the available options.
- Select "Print Staircase" on your printer's touch screen.
- When the print finishes, press the "Next" button on the printer's touch screen.
- Once the fiber nozzle has finished heating, press "Next" to swipe the nozzle over the staircase print.
- Examine the part without removing it from the print bed, and identify the left-most box that has a drag mark from the fiber nozzle running over the part.
If you are experiencing routine fiber jams and printing with carbon fiber reinforcement, we recommend raising your fiber nozzle one step compared to the image below, so that the drag mark begins on step one rather than step zero. This increased spacing will compensate for carbon fiber's increased layer height.
- If the line begins in the "Zero" box, your nozzle is correctly calibrated.
- If the line begins in a negative numbered box, your nozzle is too low.
- If the line begins in a positive numbered box, your nozzle is too high.
Note: A rotation of 18 degrees of the adjustment screw will raise or lower the fiber nozzle by one step height in the test print. Rotating the Allen wrench in a Counter-clockwise direction will cause the Fiber Nozzle to move up.
Note: If the fiber nozzle was high when it swiped over the part, the nozzle can be swiped over that row again for further adjustment/checking. This will not affect the printer or calibration. If the nozzle was too low when it was swiped over the part, the nozzle can still be swiped over that row again, but will not provide any further diagnostic information.