Z Offset Check

Required tools:

  • A business card

Time required: About 15 minutes.

Difficulty Level: Medium

Maintenance period: Anytime there is a change in thickness of the build plate, such as when adding a different build plate or adding tape for printing.

Comments: Invest extra time in these steps to achieve perfection and high quality prints

A user may need to change this Z Offset setting anytime there is a nozzle change, change to the Quick-change Build Platform, or when using different bed adhesion methods that effect the first layer’s height. The Quick-change Build platform is levelled at manufacture time and is a separate adjustment from Z Offset Check.

Support Video:

Steps to confirm/adjust the Z Offset:

  1. Turn on the printer.
  2. Home all axes (see Home the Printer).
  3. Move the Z axis 5 mm in the positive direction (see X/Y/Z Axis Movement Control).
  4. Release the stepper motors (see Release Stepper Motors).
  5. Gently push the Extruder Assembly to the center line of the Quick-change Build Platform.
  6. Gently position the Quick-change Build Platform such that the nozzle is centered over it.
  7. Position a business card flat on the Quick-change Build Platform, directly under the nozzle.
  8. Move the Z-axis in 1mm steps in the negative direction (see X/Y/Z Axis Movement Control) until nozzle is within 1mm of the business card.
  9. Move the Z-axis in 0.1mm steps in the negative direction (see X/Y/Z Axis Movement Control) until nozzle contacts the business card and the business card can not slide freely below the nozzle.
  10. Enter that number (minus 0.2) as the new Z Offset setting in SETTINGS > PRINTER > PRINT AREA > Z OFFSET and click SAVE to commit the change.  UPDATE: The latest software version does not require user to click save it will commit automatically.

Steps to confirm/adjust the Z Offset (Precise Adjustment):

  1. Print the file "Z Offset Check.STL" with standard settings. If this file is not in the Touch Interface LOCAL LIBRARY, continue by downloading the attached file to your desktop version of MatterControl and add it to the Cloud Library from your desktop.
  2. While the Z Offset Check is printing the first layer, notice if the nozzle is too low, too high, or just right. This is done by carefully looking at the extruded filament on the Quick-change Build Platform.
    1. If the nozzle is too low, the filament appears extremely thin and flat with large amounts of overlapping. There can also be some small ripples forming due to heat warping.
    2. If the nozzle is too high, the filament doesn’t print all the way to the edges and there are gaps between filament rows.
    3. If the nozzle height is just right, there is a slight overlap between the filament strands and it still prints to the edges.
  3. If the nozzle height is too low during the first layer of printing, move the nozzle up by 0.1 mm (see X/Y/Z Axis Movement Control). Repeat this step as needed until the print looks just right.
  4. If the nozzle height is too high during the first layer of printing, move the nozzle down by 0.1 mm (see X/Y/Z Axis Movement Control). Repeat this step as needed until the print looks just right.
  5. Take note of the change in Z height.
  6. After the first layer has printed, cancel the print. The x-axis will return to the home position after the printer finishes its last line of code. Use the print removal tool to remove the test prints from the quick change build plate.
  7. Add the change in Z height to the Z Offset setting in SETTINGS > PRINTER > PRINT AREA > Z OFFSET and click SAVE to commit the change.
  8. If small adjustments are still required, repeat steps 1 to 7.

NOTE: If you suspect that the axis is not level proceed with X Axis Level confirmation 

 

 

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