Y-Idlers Belt Movement Inspection

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


The procedure that follows explains how to inspect the Y-axis idlers.

Y-axis idlers in good condition prevent:

  • Rough belt operation that cause belt damage.
  • Inconsistent print layers.
  • Unwanted loud noises and vibrations during movement.


None required.

Parts Information

None required.

If the machine is presently equipped with the older version of the Y-idlers, AON3D recommends upgrading to the Y-Idler Field Upgrade Kit (K-0302-003). This kit includes two Y-idler assemblies that will greatly improve the print quality and overall machine reliability. The Y-Idler Field Upgrade Kit (K-0302-003) is offered to all AON-M2 and AON-M2 2020 owners at no additional cost as a one-time upgrade when upgrading from the original Y-idler assembly only. Please reach out to our Customer Success team at help@aon3d.com with your company name and machine serial number (identification plate is found at the back of the machine).

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 300 mm.
  3. Push the E-stop button.
  4. Wait until the build chamber, build plate and hot ends are at room temperature.

Y-Idlers Inspection

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.

  1. Open the build chamber door.
  2. Manually try to move the Y-idler (1) found on the left. Make sure the Y-idler is not loose.
  3. Make sure there is no damage(s) on the Y-idler. Left Y-Idler
  4. Do steps 2 and 3 for Y-idler found on the right.
  5. If damage is found on either of the Y-idlers, or if they are not tight, go directly to step 11. If not, continue with step 6.
  6. Close the build chamber door.
  7. Release the E-stop button.
  8. Home XYZ.
  9. Do steps 9a to 9d to change the Jog value of the machine.
    1. With the user interface, go to the Motion menu (2).
    2. Select the Left Tool (3).
    3. Set the Jog Distance (4) to 100 mm.
    4. Set the Jog Speed (5) to 10000 mm/min.
    5. Push the Y+ arrow (6) three times to move the Y-axis to the back of the machine. Motion Menu
  10. Do the steps that follow at the same time:
    1. On the user interface, push the XY button (7) to set the X-axis and Y-axis to their home position.
    2. When the Y-axis moves, look at the two Y-idlers (1) and make sure that:
      1. The belt (8) movement is smooth and does not rub with components.
      2. There are no loud or unusual noises from the Y-idler.
      3. The Y-idler has no vibration. Left Y-Idler and Belt

        Do step 10 as necessary to get confirmation that Y-idler assemblies are in good condition.

  11. If the Y-idler inspection is not satisfactory, do one of the steps that follow:
    1. If one or two Y-idlers are damaged, replace the Y-idler(s).
    2. If the Y-idlers are not damaged, adjust the belt tension. Refer to Belt Tension Inspection and Adjustment.

Test and Return to Service

  1. Close the build chamber door.
  2. Home XYZ.

Last modified: July 2, 2021