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Solved Wierd print issues..

Discussion in 'Troubleshooting' started by UltimaA380, Apr 14, 2018.

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  1. UltimaA380

    UltimaA380 New Member

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    I am trying to print a small part, and on the underside its very messy however on the top it is fairly clean. I am using IC3D Grey 1.75mm PLA printing at 190c.

    Robo 3d R1+

    Just looking for a little help, thanks!

    [​IMG]
    [​IMG]
     
  2. UltimaA380

    UltimaA380 New Member

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    Also should mention I am using MatterControl as Cura seemed to have slightly worse results.
     
  3. mark tomlinson

    mark tomlinson ¯\_(⊙︿⊙)_/¯
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    If the bottom layers are the problem, adjust the autoleveling Z offset down a little (the M565 command in the startup GCode block -- no clue how that is edited in cura but MC is here: http://wiki.mattercontrol.com/SETTINGS/Printer/Custom_G-Code/Start_G-Code

    you should have an M565 Z-1.0

    (or whatever your autoleveling Z offset is, that is a default).

    Adjust id down a bit. More negative is further from the bed (i.e. M565 Z-1.1) and less negative is closer to the bed (I.e. M565 Z-0.9)
     
  4. mark tomlinson

    mark tomlinson ¯\_(⊙︿⊙)_/¯
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  5. mark tomlinson

    mark tomlinson ¯\_(⊙︿⊙)_/¯
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    Here is an example startup GCode block for one of mine:

    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


    Note that the M565 comes AFTER the last G28 and BEFORE the G29
     
  6. UltimaA380

    UltimaA380 New Member

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    My start gcode is

    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

    by default.


    My main issue is the blobs, I kind of like the bottom layer look and it appears to adhere, though if that causes the blobs I guess I'll have to try and fix.
     
  7. mark tomlinson

    mark tomlinson ¯\_(⊙︿⊙)_/¯
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    The blobs on the sides ... could be over extrusion (calibrate the extruder) or a loose belt/drive cog on whatever axis that side is where it is worst (although it spans more than one axis I think, but it is worst on one side)
     
  8. mark tomlinson

    mark tomlinson ¯\_(⊙︿⊙)_/¯
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  9. UltimaA380

    UltimaA380 New Member

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    Changing it to -0.75 fixed it. Thanks!
     
    mark tomlinson likes this.
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