Filament changes with the Titan

Discussion in 'Titan' started by amr_dwarf, Jul 27, 2016.

  1. amr_dwarf

    amr_dwarf Member

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    Hi,

    How do you go about swapping filament with the Titan?

    I tried it as with my wades extruder.
    - heat to 80 deg C (PLA)
    - Quickly back out filament.
    This gave me a clean change every time.

    But trying the same thing with the Titan gives me troubles.
    The very end of the filament that comes up from the hotend is a bit deformed from being melted and gets stuck in the white (3 mm) filament guide.

    I guess I could cut the filament and just feed the new in as I extrude. But that is only good for change if color in the same material. I do not want to do that if I change from ABS to PLA or the other way around. Much less so when going from ABS to a flexible.

    So how do you guys change filament?
     
    #1 amr_dwarf, Jul 27, 2016
  2. mike01hu

    mike01hu Well-Known Member

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    Push the filament in first then quickly withdraw it.
     
    #2 mike01hu, Jul 27, 2016
  3. amr_dwarf

    amr_dwarf Member

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    Should I use the same temperature when doing it that way mike01hu?

    Sounds a bit backwards to first push it in. Would that not deform it even more?
     
    #3 amr_dwarf, Jul 28, 2016
  4. PsyVision

    PsyVision Moderator
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    I heat mine to 210 (if changing from PLA) and then pull the idler open and pull the filament (no push). I then hold the idler open and push the new filament in and then i'll extrude 100mm and proceed to print with new filament. This is when PLA -> PLA. I may do different temps if different materials.
     
    #4 PsyVision, Jul 28, 2016
  5. amr_dwarf

    amr_dwarf Member

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    When heating all the way up to 210 do you get all PLA out?

    I have tried 210 before and it was always PLA left in the hotend. And also when pulling it out at that temp you get a long string thruu the whole extruder.

    But keep suggestions coming, I will try them all.
     
    #5 amr_dwarf, Jul 28, 2016
  6. Argus

    Argus Member

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    I have the same issue when changing/removing filament. the little piece of PTFE required for 1.75 filament comes out far too easily.

    Below is a pic of the Titan clone idler arm. I is an improvement in a couple of ways -
    - The hole size in the lever for the PTFE is a tighter fit and doesn't come out easily when changing filament.
    - The top is redesigned to allow easier access to move it to release the filament.

    I have an original Titan and a clone so I have been able to compare the differences first hand.


    2016-07-28_18-40-42.jpeg
     
    #6 Argus, Jul 28, 2016
    Last edited: Jul 28, 2016
  7. amr_dwarf

    amr_dwarf Member

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    I do not see how any change to the idler arm would eliminate filament getting stuck in the filament guide when backing it out of the hotend?
     
    #7 amr_dwarf, Jul 28, 2016
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