E3D V6 - surface roughness

Discussion in 'E3D-v6 and Lite6' started by MosfetN, Sep 3, 2016.

  1. MosfetN

    MosfetN Member

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    Hi,
    I have problems with my new E3D V6 hotend (0.4mm nozzle), i use it with bowden and geared extruder . Surface of the print is not smooth . I don't know what could cause this problem . I have tried almost everything . IMG_0291.JPG IMG_0292.JPG IMG_0293.JPG IMG_0294.JPG
     
  2. Kanedias

    Kanedias Well-Known Member

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  3. MosfetN

    MosfetN Member

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    That's what i have tried to do/change with no results:
    - replace standard Mk7 extruder to geared one (belt driven 3:1)
    - microsteps
    - motor current
    - belt tension
    - feedrate
    - extrusion multiplier
    - extrusion width
    - bowden tube shortening
    - hotend temperature
    - different filaments
    - replacing PTFE tube connector for one without looseness
    - acceleration
    - XY jerk
    - changing stepstick
     
  4. Kanedias

    Kanedias Well-Known Member

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    It looks a bit like overextension to me, but a calibration cube should confirm that.
     
  5. mike01hu

    mike01hu Well-Known Member

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    A layer 1 picture would be helpful too but it does look a bit over-extruded. Also, think about retraction, if any, as with infill, it is likely you are using it. V6 should not have retraction over 2mm for best results.
     
  6. MosfetN

    MosfetN Member

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    I have changed extrusion multiplier from 75%(under-extrusion) to 125%(over-extrusion) by 5% steps with no results ... I have also changed extruder stepper motor today still with no results. I don't have any other ideas.
     
  7. Kanedias

    Kanedias Well-Known Member

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    Print the standard 20mm calibration cube with 100% infill, take a picture of the 1st layer and the completed cube and its measurements. Lets take a look at the Profile you're using, all the tabs please. Whats your esteps currently set to? And just to rule it out - How many dots are there on your 0.4 nozzle?
     
  8. Eviltoy

    Eviltoy Well-Known Member

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    Sam issue I have Ill be watching this thread
     
  9. MosfetN

    MosfetN Member

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    Pictures of 20mm calibration cube and its measurements: IMG_0295.JPG IMG_0296.JPG
    Printed with PETG filament on 0.2mm layer ,100% infill ,25mm/s perimeter feedrate. First layer is very clean , I 'll upload a photo tomorrow. I think that there might be a problem with X and Y axis or with the extruder. There are 3 dots on my nozzle . My E steps are currently set to 472/mm.
     
  10. MosfetN

    MosfetN Member

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    Problem solved !:) It was caused by missing microsteps in all steppers . All of the stepsticks (A4988/DRV8825/TMC2100) can't handle 24 V input voltage with low voltage stepper motors (for ex. 3.2V) .When i switched to 12V everything is fine.
     
  11. MosfetN

    MosfetN Member

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    Problem came back ..... I don't know what to do now. @Eviltoy could you give me specifications of your 3D printer?
     
  12. Eviltoy

    Eviltoy Well-Known Member

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    i had a wonky thermistor and my issue is fixed. Are your extruder temps stable? Minewas stable too and i got these symptoms.
     
  13. MosfetN

    MosfetN Member

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    Yesterday i have changed the whole hotend assembly from genuine E3D V6 to old one peek J-head with 0.5mm nozzle.
    Results are surprising the surface is now much smoother.
    IMG_0323.jpg
     
  14. Eviltoy

    Eviltoy Well-Known Member

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    Can you check if you heat your hotend up to print temp if the nozzle or heater block has a slight wiggle to it?
     
  15. Eviltoy

    Eviltoy Well-Known Member

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    Have you checked that your Z motors shafts are straight and without wobble. The actual stepper motor shafts
     
  16. MosfetN

    MosfetN Member

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    Z motor shaft don't have any wobble also hotend after heating up don't have any looseness.
     

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