X and Y Axes Perpendicularity Inspection and Adjustment

Model [X] AON-M2 [X] AON-M2 2020
Category [X] Preventive [ ] Corrective [ ] Troubleshooting

Summary

The procedure that follows explains how to inspect and adjust the X and Y axes perpendicularity.

Perpendicular axes prevent:

  • X-axis and/or Y-axis binding.
  • Loud noises when the axes move.
  • Premature wear of machine components.
  • Inconsistent print layers.

Tools

Qty Description Specification
1 Machinist Block 1-2-3 inch, standard issue
A/R Shim Stock 0.003 inch thick
1 Hex Key 2.5 mm
1 Hex Key 4 mm
A/R Rags Lint-free
A/R Isopropyl Alcohol 99%
A/R Cardboard Sheet Approx. 200 mm wide x 400 mm length (8 inches x 16 inches)

Personal Protective Equipment

Qty Description Specification
1 Safety Eyewear N/A
A/R Gloves Nitrile

Prepare the Machine

  1. Home XYZ.
  2. Lower the Z-axis by 100 mm.
  3. Push the E-stop button.
  4. Wait until the build chamber, build plate and hot ends are at room temperature.

Inspect XY Axes Perpendicularity

Allow all machine components to reach room temperature prior to proceeding further. Failure to allow components to cool down will result in thermal injury (burns) to personnel.

Machinist Block References

  1. Open the build chamber door.
  2. Manually place the Y-axis gantry to the center of the Y-axis.
  3. Use the isopropyl alcohol and a clean lint-free rag to clean the two Y-axis linear rail (2) and the two mounting plate (3) surfaces.
  4. Put the machinist block (1) in contact with both the inside of the left Y-axis linear rail (2) and the left mounting plate (3) face found under the X-axis assembly (5). Hold the machinist block (1) in this position.
  5. Use the 0.003 inch shim stock to make sure that there is no space between the machinist block (1) and the left mounting plate (3) face found under the X-axis assembly (5).
  6. Do steps 3 and 5 on the right side of the Y-axis gantry.
  7. If the Y-axis linear rail (2) and the mounting plate (3) under the X-axis assembly (5) are not perpendicular, refer to Adjust X-Y Axes Perpendicularity.
  8. Remove the machinist block (1) and 0.003 inch shim stock.

Adjust X-Y Axes Perpendicularity

  1. Place the cardboard sheet onto the build plate to prevent damage.
  2. Remove the X-axis assembly (5) from the two mounting plates (3):
    1. On the left side of the Y-axis gantry, use the 4 mm hex key to remove the four screws (4) from under the X-axis assembly (5). Left Screws Removal
    2. On the right side of the Y-axis gantry, use the 4 mm hex key to remove the four screws (6) from under the X-axis assembly (5). Right Screws Removal

      Do not twist and/or pull on the X-axis assembly (5) too much. The X-axis assembly (5) has multiple wires and tubes attached to it. Failure to do so will damage the machine components.

  3. Carefully remove the X-axis assembly (5) and place it on the build plate.
  4. Adjust the mounting plates (3):
    1. Use the isopropyl alcohol and a clean lint-free rag to clean the two mounting plate (3) top surfaces.
    2. Use the 2.5 mm hex key to loosen the four screws (7) that hold the left mounting plate (3) into position. Do not remove the four screws (7). Adjustment Screws for Mounting Plate
    3. Put the machinist block (1) in contact with both the inside of the left Y-axis linear rail (2) and the left mounting plate (3) face found under the X-axis assembly (5). Hold the machinist block (1) in this position. Machinist Block References
    4. Carefully push the mounting plate (3) against the machinist block (1) to create a 90° angle between the Y-axis linear rail (2) and the left mounting plate (3).
    5. Use the 2.5 mm hex key to gradually tighten the four screws (7), in a criss-cross pattern, to lock the mounting plate (3) into position. Refer to illustration below.

      Do not tighten the four screws (7) too much. This will damage to the machine components. Only tighten the screws until they are not loose.

      Mounting Plates Tightening Sequence
    6. Put the machinist block (1) in contact with both the inside of the left Y-axis linear rail (2) and the left mounting plate (3) face found under the X-axis assembly (5). Hold the machinist block (1) in this position.
    7. Use the 0.003 inch shim stock to make sure that there is no space between the machinist block (1) and the left mounting plate (3) face found under the X-axis assembly (5).
    8. If a space exists, do steps 3b to 3g as necessary.
    9. Do steps 3b to 3h on the right side of the Y-axis gantry.
    10. Remove the machinist block (1) and 0.003 inch shim stock.
  5. Use the isopropyl alcohol and a clean lint-free rag to clean the underside surface of the X-axis assembly (5) as necessary. Let surface dry for five minutes.
  6. Install the X-axis assembly:

    Do not twist and/or pull on the X-axis assembly (5) too much. The X-axis assembly (5) has multiple wires and tubes attached to it. Failure to do so will damage the machine components.

    1. Carefully put the Y-axis assembly (5) into position on the two mounting plates (3).
    2. Install the four screws (4) through the left-side mounting plate (3) and into the Y-axis assembly (5). Do not tighten the four screws (4) at this time. Left Screws Install
    3. Install the four screws (6) through the right-side mounting plate (3) and into the Y-axis assembly (5). Do not tighten the four screws (6) at this time. Right Screws Install

      Do not tighten the screws (4)(6) too much. This will damage to the machine components. Only tighten the screws until they are not loose.

    4. Use the 4 mm hex key to gradually tighten the eight screws (4)(6) into the Y-axis assembly (5) in a criss-cross pattern.
    5. Make sure that all eight screws (4)(6) are tight.
    6. Remove the cardboard sheet from build plate. Discard the cardboard sheet.
    7. Use the isopropyl alcohol and a clean lint-free rag to clean the build plate as necessary.
    8. Let the build plate dry for five minutes.
    9. Make sure no tools remain in the build chamber.
    10. Close the build chamber door.

Return to Service

  1. Release the E-stop button.
  2. Home XYZ.
  3. Lower the Z-axis by 100 mm.
  4. Move the Y-axis approximately 300 mm in both Y+ and Y- directions with the user interface.
  5. Home XYZ.
  6. Make sure there is no more noise and/or vibrations than usual.
  7. Do steps 3 to 6 two times.

Last modified: June 28, 2021