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Unanswered T-Glase not sticking

Discussion in 'Troubleshooting' started by Curgon, Mar 22, 2016.

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  1. mark tomlinson

    mark tomlinson ༼ つ ◕_ ◕ ༽つ
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    I would suggest leaving of the tape. Either use painters tape or just use hairspray.
     
    #21 mark tomlinson, Mar 23, 2016
  2. Curgon

    Curgon New Member

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    I current use painters tape, with hairspray on it.

    Would you advise differently?
     
    #22 Curgon, Mar 23, 2016
  3. mark tomlinson

    mark tomlinson ༼ つ ◕_ ◕ ༽つ
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    That is fine. There is no magic sauce. :)
    I use bare glass and hairspray (and frankly the hairspray is largely panacea, if I didn't use it I suspect it would still stick fine).

    Temperature and Z offset are more critical to a filament sticking to the bed.
     
    #23 mark tomlinson, Mar 23, 2016
  4. Curgon

    Curgon New Member

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    Yeah, the offset is what has me confused since its auto leveling. I am not sure how or where I would start to adjust that, or if its even needed.
     
    #24 Curgon, Mar 23, 2016
  5. mark tomlinson

    mark tomlinson ༼ つ ◕_ ◕ ༽つ
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    It is needed. It should be in the startup gcode (where ever your software defines that).

    Mine looks like this:

    G28 ; home all axes
    G1 Z5 F5000 ; lift Z by 5mm
    M565 Z-0.6 ; set the offset for auto-leveling mechanism
    G29 ; run auto-level
    M109 S[extruder0_temperature] ; set the extruder temp and wait


    That last line is simplify3d specific, but the M565 is not and that is what sets your Z offset
     
    #25 mark tomlinson, Mar 23, 2016
    Last edited: Mar 23, 2016
  6. mark tomlinson

    mark tomlinson ༼ つ ◕_ ◕ ༽つ
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    You will need to experiment, your best Z offset # will be specific to your printer.
    Both of mine have different numbers. THis one is 0.6 the other Robo is 0.9
     
    #26 mark tomlinson, Mar 23, 2016
  7. Curgon

    Curgon New Member

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    Are the offsets defined in Simplfy3D somewhere by chance?
     
    #27 Curgon, Mar 23, 2016
  8. mark tomlinson

    mark tomlinson ༼ つ ◕_ ◕ ༽つ
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    Startup GCode is the best place to do it,

    In this pic I do not have much in there, but that is where it goes:

    startup Gcode.jpg
     
    #28 mark tomlinson, Mar 23, 2016
  9. Curgon

    Curgon New Member

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    Ah ok, do you have a sample syntax I could use and just change the value to what I need?
     
    #29 Curgon, Mar 23, 2016
  10. mark tomlinson

    mark tomlinson ༼ つ ◕_ ◕ ༽つ
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    G28 ; home all axes
    G1 Z5 F5000 ; lift Z by 5mm
    M565 Z-0.6 ; set the offset for auto-leveling mechanism
    G29 ; run auto-level
    M109 S[extruder0_temperature] ; set the extruder temp and wait

    As I posted before :)

    That last line is S3D specific, other slicers will do it different. The M565 is what you want to play with.
    Set a value (0.0 -> 0.9) run a 1 layer print and see. Compare to this:

    https://printedsolid.com/blogs/news/37035715-get-your-prints-to-stick-check-your-skirt
     
    #30 mark tomlinson, Mar 23, 2016
  11. Curgon

    Curgon New Member

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    Well my friends, you were very helpful. Only problem left to troubleshoot, was why simplyfy3D keeps stopping like 2-3 layers in, the start and END thing are weird, if anyone knows what I am referring to
     
    #31 Curgon, Mar 23, 2016
  12. mark tomlinson

    mark tomlinson ༼ つ ◕_ ◕ ༽つ
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    #32 mark tomlinson, Mar 24, 2016
  13. Curgon

    Curgon New Member

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    Sorry for not getting back. Your help and settings helped me get in a good direction!

    Next thing to learn, properly cleaning of the nozzle.
     
    #33 Curgon, Mar 30, 2016
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  14. Kristin B

    Kristin B New Member

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    I've only had my printer for a few weeks and I'm still trying to figure all of this out. I have had problems with my nozzle being too close to the bed, and squishing the first layer. I am using MatterControl. I switched the slicer to Slic3r and found that adjusting the z-offset to 0.3 fixed the issue, but I didn't like the other things that Slic3r did to the supports generated, so I switched the slice engine back to CuraEngine (which I find generates supports that are much easier to remove - even after fiddling with the Slic3r support settings) and now need to make a similar z-axis adjustment. As far as I can tell, CuraEngine doesn't let me specify a z-offset explicitly, so I can only do it with the G-Code...right? Here's the default G-Code that is the default (MatterControl 1.5; Robo 3d 1+);

    G28 X0 Y0 Z0 ; home all axes
    G1 Z5 F5000 ; lift nozzle
    M109 S[temperature] ; set the extruder temp and wait
    G28 X0 Y0 Z0 ; Home Z again in case there was filament on nozzle
    G29 ; probe the bed

    So...would I change it to this? (Adding a M565 line after the first two lines)

    G28 X0 Y0 Z0 ; home all axes
    G1 Z5 F5000 ; lift nozzle
    M565 Z-0.3 ; set the offset for auto-leveling mechanism
    M109 S[temperature] ; set the extruder temp and wait
    G28 X0 Y0 Z0 ; Home Z again in case there was filament on nozzle
    G29 ; probe the bed

    My main concern for even trying this is that I'm worried the "Z-0.6" that you have means NEGATIVE Z (which is not at all what I want), but you mentioned setting it between 0.0 and 0.9 so I'm thinking that little line is just a dash and not a negative? Thanks for the guidance!
     
    #34 Kristin B, Apr 9, 2016
  15. WheresWaldo

    WheresWaldo Volunteer ( ͠° ͟ʖ ͡°)
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    @Kristin B M565 for the configuration of the Robo is always the non-intuitive negative number. The more negative the higher from the bed, the less negative the closer to the bed. It was a dumb way to implement it but it is what we are stuck with. You should place that line between the homing command (G28) and your auto-leveling command (G29).
     
    #35 WheresWaldo, Apr 10, 2016
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  16. Kristin B

    Kristin B New Member

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    Ah...got it. I will give this a try and see if that fixes my problem.

    G28 X0 Y0 Z0 ; home all axes
    G1 Z5 F5000 ; lift nozzle
    M109 S[temperature] ; set the extruder temp and wait
    G28 X0 Y0 Z0 ; Home Z again in case there was filament on nozzle
    M565 Z-0.3 ; set the offset for auto-leveling mechanism
    G29 ; probe the bed

    Thanks!
     
    #36 Kristin B, Apr 11, 2016
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