E3D full kit head on 3DRAG/K8200 significant under extrusion.

Discussion in 'E3D-v6 and Lite6' started by Noel Dillane, Sep 10, 2015.

  1. Noel Dillane

    Noel Dillane Member

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    Hi All
    I recently purchased the E3D full kit head and have fitted it to my 3DRAG/K8200 RepRap 3D Printer
    I am seeing issues with significant under extrusion. I am using .4mm nozzle
    No matter what I do using normal calibration process (i.e. changing E steps) I can't get it to
    extrude anywhere near what it is suppose to be extruding. When I go through calibration routine and
    request 5mm I am typically getting 1 -2 mm. Like i said its way off
    I have tried:
    - varying temp
    - increasing steps per MM for extruder
    - Removed and cleaned hobbed bolt
    - heat sink on extruder stepper motor driver and cooling fan
    - disassembling, cleaning and reassembling head
    - increasing extruder stepper motor voltage
    As off now I can't use the E3D head for printing at all and need to revert to stock head that came with the printer
    Any advice please
    tks
    Noel
     
  2. Mike Kelly

    Mike Kelly Volunteer

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    if you try and free extrude (not through the hot end) and hold the filament, does it skip super easy?
     
  3. e3duser

    e3duser Active Member

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    Does the bolt appear to be turning 5 mm ?
     
  4. Dr Jeep

    Dr Jeep Well-Known Member

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    I have the same setup as you and didn't need to adjust extrusion steps when moving between the vellman hotend and the e3d. What temp are you running at and are you sure the thermistor is set up (I can't remember if I had to set a different thermistor type or not) just wondering if the hot end is cooler than you think it is ? Might be worth borrowing a temp probe from someone and verifying.

    The other thing to check is extrude 5mm and then carefully wind the filament out of the extruded. Check that there aren't signs of stripping where the hobbed bolt cuts into the filament as this would indicate that either you are running too cold, have the tensioner set up wrong or you have the jamming issue others describe.

    If all was well you should be able to put the e3d on that printer and get reasonable results without changing anything or at least that was my experience though something nags at me that I changed the themistor type
     
  5. Dr Jeep

    Dr Jeep Well-Known Member

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    Right found my old post ;) download the firmware from the vellman site and check in a text editor or arduino suite that it defaults to type 5 thermistors.
     
  6. ElmaWebber

    ElmaWebber New Member

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    I want to know about the control hardware which is used here ?
    What are the specifications of it? And what are its I/O and the I-V characteristics?
    Can you please post the schematics here related with it?
    Also what are other hardware components which are connected with it?

    full turnkey assembly
     
    #6 ElmaWebber, Nov 17, 2015
    Last edited: Nov 25, 2015

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