Adjust Belt Tension

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

Summary

This procedure checks the belt tension for all axes and provides instruction on how to adjust the tension as required.

Tools

Qty Description Specification
1 Sonic Tension Meter Gates Unitta Asia U-508
1 Hex Key 4mm
1 Wrench 8mm
1 Wrench 10mm
1 Spacer Block 6mm Thick

For success plan customers, the sonic tension meter is on loan free of charge from AON3D to support the troubleshooting and maintenance of your machine. Rental options are also available.
Please contact our Customer Success team at help@aon3d.com if you would like to borrow this tool.

Parts Information

None Required.

Personal Protective Equipment

None Required.

Preparation

  1. Cool down the machine to room temperature.
  2. Home XYZ.
  3. Lower the Z-axis to 200mm.
  4. Move the Y-axis to 450mm (to the back of the machine).
  5. Press the E-stop button, switch off the power, and unplug the printer. Setup Sonic Tension Meter
  6. Remove the sonic tension meter and flexible sensor from the shipping box.
  7. Install the flexible sensor onto the sonic tension meter.
  8. Press the POWER button to turn on the sonic tension meter.

Note that if you are using your own sonic tension meter and not the one that is loaned by AON3D, you must set up your sonic tension meter with the parameters from the table below.

Axis Mass (M) Width (W) Span (S) Preset
X 1.4 g/m 9 mm/R 600 mm 1
Y 1.4 g/m 9 mm/R 640 mm 2
Z 1.4 g/m 9 mm/R 171 mm 3

Check X-Axis Belt Tension

  1. Manually pull the X-gantry to the front of the machine.
  2. Make sure that both tool heads are in their parked position (at each extremity of the X gantry).
  3. Press the 1 button to select the X-axis belt tension test. Sonic Tension Meter X-Axis Belt
  4. Position the flexible sensor of the sonic tension meter as close to the X-axis belt as possible without touching it.

    Do not tap the belt near the ends. This will result in the sonic tension meter recording invalid results. The belt must be tapped near the middle to be able to record an accurate reading.

  5. Press the MEASURE button and tap the middle of the belt slightly with a finger. Note the recorded tension value.
  6. Repeat the previous measurement two more times and note the recorded tension values.
  7. If the average of the three noted values is not 30 ± 5N, Adjust X-Axis Belt Tension.
  8. Manually push the X-gantry to the back of the machine.

Check Y-Axis Belt Tension

  1. Press the 2 button to select the Y-axis belt tension test. Sonic Tension Meter Y-Axis Belt
  2. Position the flexible sensor of the sonic tension meter as close to the Y-axis belt as possible without touching it.

    Do not tap the belt near the ends. This will result in the sonic tension meter recording invalid results. The belt must be tapped near the middle to be able to record an accurate reading.

  3. Press the MEASURE button and tap the middle of the belt slightly with a finger. Note the recorded tension value.
  4. Repeat the previous measurement two more times and note the recorded tension values.
  5. If the average of the three noted values is not 30 ± 5N, Adjust Y-Axis Belt Tension.
  6. Repeat the previous steps for the other Y-axis belt.

Check Z-Axis Belt Tension

  1. Press the 3 button to select the Z-axis belt tension test. Sonic Tension Meter Z-Axis Belt
  2. Position the flexible sensor of the sonic tension meter as close to the Z-axis belt as possible without touching it.

    Do not tap the belt near the ends. This will result in the sonic tension meter recording invalid results. The belt must be tapped near the middle to be able to record an accurate reading.

  3. Press the MEASURE button and tap the middle of the belt slightly with a finger. Note the recorded tension value.
  4. Repeat the previous measurement two more times and note the recorded tension values.
  5. If the average of the three noted values is not 20 ± 5N, Adjust Z-Axis Belt Tension.
  6. Repeat the previous steps for the other Z-axis belt.

Adjust X-Axis Belt Tension

Adjust X-Axis Belt Tension

The X-axis belt can be tensioned from either the left or the right side.

  1. Manually pull the X-gantry to the front of the machine.
  2. Loosen the left or right X-axis belt block jam nut (1) with a 10mm wrench.
  3. Tighten or loosen the X-axis belt block tensioning screw (2) with a 10mm wrench as required.
  4. Check the X-Axis Belt Tension.
  5. When the X-axis belt tension is 30 ± 5N, tighten the jam nut (1) with a 10mm wrench.
  6. Check the X-Axis Belt Tension.
  7. If X-axis belt tension is no longer 30 ± 5N, repeat the previous steps until the final value falls within range.
  8. Manually push the X-gantry to the back of the machine.

Adjust Y-Axis Belt Tension

Adjust Y-Axis Belt Tension

  1. Loosen the Y-idler jam nut (1) with a 10mm wrench.
  2. Tighten or loosen the Y-idler tensioning screw (2) with a 10mm wrench as required.
  3. Check the Y-Axis Belt Tension.
  4. When the Y-axis belt tension is 30 ± 5N, tighten the jam nut (1) with a 10mm wrench.
  5. Check the Y-Axis Belt Tension.
  6. If Y-axis belt tension is no longer 30 ± 5N, repeat the previous steps until the final value falls within range.
  7. Repeat the previous steps for the other Y-idler assembly.

The left and right Y-axis belt tensions should be ± 10N from each other.

Adjust Z-Axis Belt Tension

AON-M2 Cable Carrier Cover vs AON-M2 2020 Cable Carrier Cover

  1. Identify if the machine is an AON-M2 or an AON-M2 2020. Look at the Cable Carrier Cover at the back of the build chamber.
  2. If the machine is an AON-M2, Adjust Z-Axis Belt Tension - AON-M2.
  3. If the machine is an AON-M2 2020, Adjust Z-Axis Belt Tension - AON-M2 2020.

Adjust Z-Axis Belt Tension - AON-M2

Adjust Z-Axis Belt Tension

  1. Loosen four socket head screws (1) securing the Z-axis motor using a 4mm hex key and 8mm wrench. Do not remove the screws.
  2. Loosen the jam nut (2) with a 10mm wrench. Do not remove the jam nut from the Z-axis tensioning screw (3).
  3. Insert the 6mm thick spacer block (4) between the Z motor and the Z-axis tensioning screw (3).
  4. Tighten or loosen the Z-axis tensioning screw (3) with a 10mm wrench as required.
  5. Check the Z-Axis Belt Tension.
  6. When the Z-axis belt tension is 20 ± 5N, tighten four socket head screws (1) with a 4mm hex key and 8mm wrench.
  7. Remove the 6mm thick spacer block (4).
  8. Tighten the jam nut (2) with a 8mm wrench.
  9. Check the Z-Axis Belt Tension.
  10. If Z-axis belt tension is no longer 20 ± 5N, repeat the previous steps until the final value falls within range.
  11. Repeat the previous steps for the other Z-axis assembly.

The left and right Z-axis belt tensions should be ± 10N from each other.

Adjust Z-Axis Belt Tension - AON-M2 2020

Adjust Z-Axis Belt Tension

  1. Loosen four socket head screws (1) with a 4mm hex key and 8mm wrench. Do not remove the screws.
  2. Loosen the jam nut (2) with a 8mm wrench.
  3. Tighten or loosen the Z-axis tensioning nut (3) with a 8mm wrench as required.
  4. Check the Z-Axis Belt Tension.
  5. When the Z-axis belt tension is 20 ± 5N, tighten four socket head screws (1) with a 4mm hex key and 8mm wrench.
  6. Tighten the jam nut (2) with a 8mm wrench.
  7. Check the Z-Axis Belt Tension.
  8. If Z-axis belt tension is no longer 20 ± 5N, repeat the previous steps until the final value falls within range.
  9. Repeat the previous steps for the other Z-axis assembly.

The left and right Z-axis belt tensions should be ± 10N from each other.

Test and Return to Service

  1. Plug in the machine and power on the machine using the switch located at the back.
  2. Reset the E-stop button.
  3. Home XYZ.
  4. Move the motion system in all axes. If any unexpected behaviors or noises occur, check and adjust all the belts again.
  5. Remove the flexible sensor from the sonic tension meter.
  6. Pack the sonic tension meter and flexible sensor into the shipping box.
  7. Return the sonic tension meter to AON3D.

Last modified: October 16, 2020