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Unanswered Z not raising during printing

Discussion in 'Troubleshooting' started by Dan Smullen, Aug 13, 2015.

  1. Dan Smullen

    Dan Smullen New Member

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    We went through a quick round of adjusting and homing, and successfully printed a calibration box. Moving on to print a custom part, we encountered more leveling and adjusting problems, which seemed to be resolved, by adjusting the z carriers. After again homing, a print started well, but after the first few layers, failed to rise with the print. The extruder tip began to drag through the material that had been previously been printed.

    Any ideas we could try before we send this thing back?

    Thanks,
     
    #1 Dan Smullen, Aug 13, 2015
  2. Johnny Yuen

    Johnny Yuen New Member

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    What program/slicer are you using? What is your first layer thickness and layer thicknesses? And what speed are you running them at?


    Sent from my iPhone using Tapatalk
     
    #2 Johnny Yuen, Aug 13, 2015
  3. WheresWaldo

    WheresWaldo Volunteer ( ͠° ͟ʖ ͡°)
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    @Johnny Yuen There are two trains of thought when it comes to first layer height. Some adjust the height of the first layer and then use the zprobe_offset (M565 command with or without babystepping) to adjust just how much adhesion you get to the bed. The second school, keeps all the layers the same size and adjusts the flowrate for the first layer only, using M565 to adjust for the proper measurement of the first layer only.

    Some slicers do not allow automatic adjustment to the flowrate by layer so many more people use the first method. The disadvantage is that it messes with the number of slices and thus the eventual height of the model. By adjusting the flowrate of layer one, you can get models that are the correct height with the correct number of slices. Either way may be perfectly acceptable depending on your needs and tools available.

    Layer size will depend on several factors, such as: What do you want your model to look like? Are you using transparent or translucent filament? Are you looking for overall strength? Are you looking to preserve fine details? And a whole lot more...

    Extrusion speed: Look at the multiple threads on filaments in the Printing Filaments sub-forum.
     
    #3 WheresWaldo, Aug 13, 2015
  4. Frankn

    Frankn Member

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    The paper adjustment only adjusts the parallelism between the X carriage rails and the work bead.
    The Z offset adjusts for nozzle height variations caused by switch activation/deactivation of Z stop switches on different printers.
    You want to set M565 Z adjustment to between -0 & 1.01 I am presently running Z-0.60.
    You have to just test run 2 slices then look at the bottom. It should be flat and glazed, but if you go past this point, the nozzle drags.
    If the nozzle is just dragging on one side of the print, the paper adjustment (parallelism) is off..
    Hope this helps, Frank.
     
    #4 Frankn, Aug 13, 2015
  5. mark tomlinson

    mark tomlinson ༼ つ ◕_ ◕ ༽つ
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    Layer size may also affect which size nozzle you are using (or the other way around).
    Opinions differ on what sizes are appropriate for the various nozzle sizes.
     
    #5 mark tomlinson, Aug 13, 2015

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