Replace Filament

Model [] AON-M2 [] AON-M2 2020 [] AON M2+ [] AON M2+ (CE)
Category [ ] Installation [] Operation [ ] Maintenance

Summary

The guide that follows gives instructions on how to:

  • Understand the difference in temperature requirements for different materials used.
  • Understand the importance of heater block assembly selections.
  • Unload the filament from the feed path(s).
  • Prepare the roll(s) of filament.
  • Install the roll(s) of filament on the AON3D machine.
  • Load the filament into the feed path(s).

Tools

Qty Description Specification
1 Wire Cutters N/A
1 Brush, Wire Brass, soft bristle

Parts Information

Qty Part Number Description
A/R Filament, Roll of N/A

Please reach out to our Customer Success team at help@aon3d.com to purchase rolls of filament.

Personal Protective Equipment

Qty Description Minimum Specification
1 Safety Eyewear ANSI/ISEA Z87.1
A/R Nitrile Gloves ISO 2859-1 or ASTM D6319
A/R Gloves Work

Filament Temperature Ranges

There will be a small amount of material in the heater block assembly(ies) when the operator changes filaments. The old material must be purged from the heater block assembly(ies) before the new material can be used.

  • To change between materials with small differences in extrusion temperatures, the previous material is purged from the heater block assembly(ies) with the use of the new material.

  • To change between materials with great differences in extrusion temperatures, it is necessary to use one or two materials to step up or down to bridge the temperature difference. While this is possible, it is not recommended. AON3D recommends to use of a different hot end assembly if the temperature difference between the two materials is large.

Before materials can be safely changed, make sure that the temperature range of the new material overlaps, or is greater than, the temperature range of the old material.

Material Change Temperature Chart

Heater Block Selection

To prevent nozzle clogs, AON3D recommends that one heater block assembly be used for one material temperature range.

  • Example: ABS material recommended nozzle temperatures range between 210°C to 280°C (410°F to 536°F) and Polycarbonate (PC) material is 250°C to 330°C (482°F to 626°F). The same heat block assembly(ies) can be be used for both ABS and PC, but the operator must make sure that the ABS has been completely purged before the PC material can be used.

  • Example: ABS materials recommend a nozzle temperature between 210°C to 280°C (410°F to 536°F) and PEEK materials recommends a nozzle temperature between 360°C to 440°C (680°F to 824°F). The same heater block assembly can be used for ABS and PEEK, but the change in nozzle temperatures are great, and can cause damages to the heater block assembly(ies) over time.

  • Example: ABS 210°C to 280°C (410°F to 536°F) and ASA 230°C to 280°C (446°F to 536°F) can safely use the same heater block assembly.

Please reach out to our Customer Success team at help@aon3d.com for genuine AON3D replacement part(s) inquiries.

Unload Filament

All machine components are hot as all heaters are enabled. Persons are to wear the correct personal protective equipment to prevent injuries.

Do the steps that follow to remove the filament from the feed path(s):

  1. On the Graphical User Interface (GUI), select Control > Motion.
    • Under the Jog Distance (mm) tab, select 100.
    • Select XY ↑ two times to put the X-axis gantry to the front of the build platform.
  2. On the GUI, select Temp and enter the target temperature of the filament that will be removed for the selected toolhead.
  3. Make sure the selected toolhead is at the target temperature.
  4. Open the build chamber door.
  5. Disconnect the PTFE tube (2) found in the extruder fitting (1).
  6. On the selected toolhead, compress the extruder tab (3) and lever (4) together to disengage the internal drive gears. Extruder Preparation
  7. Carefully pull the filament out of the selected extruder.
  8. Use the wire cutters to cut off the melted filament tip. This will help with the removal of the filament through the feed path.
  9. Close the build chamber door.
  10. Carefully pull out the filament from the feed path from the the rear of the machine.
    • Attach the end of the filament to the spool to prevent tangles, if necessary.

Prepare Filament

Make sure spool orientation is placed as such that the filament is looped and fed from behind of the spool when installed.

Filament Roll Orientation

  1. Put the filament spool holder tube through the center hole of the filament roll.
  2. Put the filament roll onto the spool holder brackets found on the rear panel of the machine.
  3. Remove the end of the filament from the spool.

    Make sure that filament is unrolled from spool without tangles. Filament tangles will cause extruder(s) to jam, cause print failure, and/or cause damages to machine component(s).

  4. Use the wire cutters to cut a 45 degree angle on the filament end. The sharp edge will help the filament through the feed path.

Filament Cut Tip

Load Filament

All machine components are hot as all heaters are enabled. Persons are to wear the correct personal protective equipment to prevent injuries.

Insert Filament

  1. Insert the filament through the selected filament detector.
  2. Carefully feed the filament until it exits at the other end of the PTFE tube, found on the inside of the build chamber.
  3. On the GUI, select Temp and enter the target temperature of the filament that will be installed into the selected toolhead.
  4. Make sure the selected toolhead is at the target temperature.
  5. Open build chamber door.
  6. Manually put the filament in the extruder, and carefully push it down into the hot end until a small quantity extrudes from the nozzle.

    Do not push the filament too hard through the extruder assembly. This can cause a restriction in the feed path, and/or, cause damage to machine component(s).

    • If there is a restriction when the filament is put into the extruder, remove and inspect the filament. Make sure the filament is straight and that there is a sharp 45 degree angle cut on the end. Do this step until the filament has been successfully installed into the extruder.
    • If there is a restriction when filament is put in the extruder body, engage and disengage the extruder gears and carefully push the filament through the extruder. This will help line up the end of the filament between the drive gears.
    • If the filament passed through the extruder, but will not feed into the PTFE guide tube, rotate the filament above the extruder to change the angle of approach when the filament is put into the PTFE guide tube. Make sure filament is straight and that the end is correctly cut at a 45 degree angle.

  7. After a small quantity of filament has been successfully extruded from the nozzle, compress the extruder tab (1) and lever (2) to engage the extruder drive gears onto the filament. When the extruder drive gears are engaged, the filament cannot be manually pulled from the extruder.
  8. Install the PTFE tube into the extruder fitting.
    • Lightly pull on the PTFE tube to make sure that it is correctly installed in the extruder.
  9. Close the build chamber door.
  10. On the GUI, select the Control > Motion and do the steps that follow:
    • Select the correct toolhead.
    • Set the Extrusion Distance (mm) to 100.
    • Set the Extrusion Speed (mm/sec) to 5.
    • Select Extrude two times to feed 200 mm of the filament through the hot end. Filament will now be extruded from the nozzle. Extrude Screen
  11. Use the wire brush to clean the nozzle.
  12. Do steps 1 to 10 for the adjacent toolhead, if necessary.

• Do not leave toolhead temperature power ON for more than 30 minutes. This can cause the filament to burn and clog the nozzle.
• Do not surpass the temperature above the maximum temperature for the selected filament. This can cause the filament to break down and/or burn and clog the nozzle.

• When a change is made to a material that needs a greater temperature than the previous material that was used, increase the selected toolhead target temperature to the minimum temperature needed for the new material.
• Unless it is outside the recommended temperature range for the new material that is installed, do not change the extrusion temperature.
• Carbon fiber, and other filled materials, can need more than 200 mm of filament to be fully purged from the heater block assembly(ies). Extrude an additional 100 mm material, if necessary. The additional 100 mm should be sufficient to purge the old material from the heater block assembly(ies). Purge additional material, if necessary.


Last modified: September 1, 2022