SOLVED Z-Axis not fast enough or something else

Discussion in 'Calibration, Help, and Troubleshooting' started by Letforeverbe, Jun 28, 2016.

  1. Letforeverbe

    Letforeverbe Member

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    Hello,
    I wanted to perform the first print, but it does not work as it should.
    I can´t print more than 9 layers.
    The printer always kicks the boat from the glas.
    The needle is on 210°C, the glas set on 50°C.

    The voltage was set to 0,595 Volt (Stepper tuning).

    Is the Z-Axis to slow? It was set to 400mm as mentioned in the build manual.

    The extruder put´s 100mm of material correct into the extruder.

    The printing looks in the first layers great. After layer 4 it gets really rough and does not look good.

     
  2. tohara

    tohara Well-Known Member

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    I assume you are printing PLA?

    Try increasing bed temp to 60c, and maybe print first layer with 220c.


    And if you are printing directly on the glass, make sure it is clean. Wipe off with alcohol if available.

    It is also important that the nozzle z offset is correctly calibrated to get a good first layer.
     
  3. Stefan

    Stefan Well-Known Member

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    Hmm I never had any luck printing pla directly on the glass, I use UHU gluestick.
    And my standard question, do you have the right Stepper on the z-axis? The 1.8° are the correct once... but you have a Pro so you would have only 1x 0.9°...

    I would do a test like this, measure the travel distance on Z like home, measure from bed to bottom, move 50 mm, measure again >should be 50 mm diff.
     
  4. Mark_T

    Mark_T Well-Known Member

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    There is nothing correct about using the 0.9 or the 1.8, they both work, you just have to the settings accordingly...
     
  5. PsyVision

    PsyVision Moderator
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    So, when you're saying that the Z is not fast enough, do you mean that it is not moving up enough (per layer) and thus after X layers you have too much plastic on the bed and not enough nozzle room....

    You're using 400 steps, are you sure you shouldnt be on 1600 ?
     
  6. tohara

    tohara Well-Known Member

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    If the leadscrews are the new with 8mm pitch then 400 is correct.
     
  7. Sarah Nicholson

    Sarah Nicholson Well-Known Member

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    That looks like a kickstarter BB with the old style fan mount so likely to need 1600.
     
  8. mike01hu

    mike01hu Well-Known Member

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    Your bed levelling is not good enough as is evident from the skirt extrusion that looks like it has not been forced into the bed. As @Stefan says, it is very difficult to print onto plain glass without some preparation, either UHU stick or PVA juice (1:5 PVA glue and water). I will assume you are using auto-levelling so you may need to tweak the Z-offset or, if not, redo your manual bed levelling with very thin paper or better use a very thin feeler gauge 0.02mm or 0.03mm; if using paper you will need to adjust the Z-offset by the paper thickness, usually about 0.15mm. I have said elsewhere that levelling is critical as is bed preparation. I print PLA at 200C with the bed at 40C on PVA juice and use MBL.
     
  9. Henry feldman

    Henry feldman Well-Known Member

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    HaHa: "I remember back in ought-sixteen when we used to have side mounted fans. Must have been nigh onto 5 months ago; times were different back then..."
     
  10. mike01hu

    mike01hu Well-Known Member

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    Them were the days Henry! :rolleyes:
     
  11. Stefan

    Stefan Well-Known Member

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    There are correct once.... 1st 1.8° I got from the build manual which means 1.8° + Stock FW = correct.
    Of cause you can use 0.9° but then you need to adjust the z-steps.
     
  12. Letforeverbe

    Letforeverbe Member

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    I got a big box pro from kickstarter. 1600 is the correct value, now it works great.
    I calibrated z-axis new, now it works great.
    Thanks to everyone!
     
    Sarah Nicholson and PsyVision like this.

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