Hot End RTD Inspection

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


This procedure gives the instruction on how to make sure that the hot end RTDs operate correctly. A working RTD prevents:

  • Overheating the printing material.
  • Underheating the printing material.
  • Blockages in the hot end.
  • Damage to the feeding system.

Personal Protective Equipment

Qty Description Specification
1 Safety Glasses N/A

Prepare the Machine

  1. Home XYZ.
  2. Lower the Z-axis by 200 mm.
  3. Wait until the build chamber, build plate and hot ends are at room temperature.

Hot End RTD Inspection

  1. On the operator interface, go to the terminal tab (1). Command Page
  2. Enter the M18 command. This prevents the axes from moving.

    Make sure to never home any axis when work is performed inside the machine. This will cause the axes to move, even with the M18 command active. Failure to do so may lead to severe injures.

  3. On T0, make sure that the connections that follow are correct:
    1. Heater plugs (2).
    2. RTD electrical plugs (3). Electrical Plugs
  4. Make sure that the RTD connects correctly in the hot end. Tighten by hand as necessary.
  5. Make sure the RTD wires are in good condition:
    1. Pinch the wires close to where they connect on the RTD.
    2. Lightly move the wires around.
    3. At the same time, make sure the temperature does not change too much on the user interface.
  6. Close the door of the machine.
  7. On the operator interface (4), make sure that T0 tool temperature is almost the same as the room temperature. T0 UI
  8. Set the T0 target temperature to 50ºC.
  9. After approximately 30 seconds, make sure that T0 temperature is 50ºC +/- 5ºC.
  10. Set the T0 tool temperature to operation temperature.

    Make sure to use a good operation temperature. The operation temperature is not the same for all printing materials. Failure to use the correct temperature can cause damage to the hot end and to the feeding system.

  11. After a few minutes, make sure that T0 temperature is at the operation temperature +/- 5ºC.
  12. If the temperature readings are not in the satisfactory range, replace hot end RTD.
  13. Do steps 1. to 12. again with T1.

Test and Return to Service

  1. Home XYZ.

Last modified: March 12, 2021