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jeremy-gillick

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Posts posted by jeremy-gillick

  1. I've been using the UM2 for a couple months now and am loving it. It's still almost always printing something. However, I still have a couple questions nagging at me. How often to people adjust their build platform? And how tight to the nozzle?

    When I get to the step of using the paper, I adjust the screws until the nozzle is rubbing the paper. Somewhere in between no friction and stuck. There's still a tiny gap when I'm done and on the next print the nozzle squishes the first layer into flat paths, which makes a nice smooth first layer. Unfortunately this doesn't last long. A few prints later the nozzle is somehow further from the build plate and now laying rounded paths on the first layer. As long as it sticks (which is sometimes a problem when it's not being squished) it doesn't harm the print, just makes the first layer a bit rougher.

    Am I adjusting it the space to be too tight? Is it normal for the space to increase after a few prints?

     

  2. I cleaned the nozzle, reset the print bed height, set the temperature to 215, brought the heated bed temp down to 60, slowed the print to 50mm/s, changed the layer height from 0.08mm to 0.1mm and added a brim to the print. Not sure which one of things things helped, but I have a perfect print going right now!

     

  3. Have you tried other filaments? Maybe a bad batch?

     

    Tried both with the brown and the stock blue that came with the printer.

     

    looks like you are printing to cold ( blue pla should be between 190 230 ) or your nozzle is blocked...

    try heating the nozzle to 90°c and than pull by hand the filament out, than cut the tip, retry a print, redo operation until the nozzle is cleaned, you want to get the particle that blocks the nozzle out, at 90 you can pull the filament without melting the pla, giving you a better chance to pull out the particle with the pla.

     

    I was printing at 210 degrees at 60mm/s. I'll try to clean the tip the way you're suggesting and see if that helps.

    Thanks.

     

  4. All of a sudden the base layer of my prints have been printing unevenly and starting to get gummy. I thought it might be my model, so I tried a previous one on the SD card with the same results. I also notice that some of the extrusion is rolling up onto the nozzle. At the second layer it starts pushing around a lump of extrusion at point.

    I've tried resetting the bed height and cleaning the nozzle by sticking a very fine wire in it. Then changed back to the original blue filament. It's still doing it.

    Any ideas?

    photo 1

    photo 2

     

  5. Another little tip is.. I find great success in going into the expert settings in Cura and choosing from the Combine Options A.

     

     

    Selecting the whole model and using the "smooth edges" command (I don't know if that's translated correctly, I'm using the german version. See screenshot below) will reveal all "double planes" which occur mostly when you're doing very small surfaces. The lines will not disappear if there are double surfaces.

     

    I was wondering what those options were. I'll try those with my model to see. The model currently consists of 3 components, so that I can edit the sides and the base apart from the structure. To solve it yesterday, I exploded all components and removed a bunch of the lines in between them.

     

  6. I exclusively use my laptop for development and -- it being a mac -- has a clickable trackpad with no real right button. So I'm lost on how to rotate the viewport around the model. When I do a two-finger click, which usually emulates a right mouse click, it still only pans.

    Is there any way to rotate without a right mouse button?

     

  7. A couple nights ago I set the machine to print a custom model, watched the first 30 minutes of printing and went to bed. In the morning it seems that the printer had printed the first 12mm correctly and then at some point the layers stopped sticking (?) and built a rats nest of filament.

    Then I changed the settings to print slower and the same thing occurred. Unfortunately this seems to happen after an hour or so of printing, so I haven't been able to stay and watch it to that point. The first print the temperature was 210 degrees and the second print was at 215.

    Both times was with a custom profile printing at 0.085 mm/layer. Next I'm going to try using the stock "Normal quality print" option, as a baseline.

    Any ideas on why this is happening? From what I've read it sounds like it could be underextrusion, but I would think slower and hotter would have helped that. This is also a temperature that I've printed everything else at.

    What I was trying to print

    What I was trying to print

     

    The rats nest

     

    Rats Nest

    What printed, with the rats nest removed

    What was printing, with the rats nest removed

     

    The printing profile

     


    [profile]
    layer_height = 0.085
    wall_thickness = 0.4
    retraction_enable = True
    solid_layer_thickness = 0.5
    fill_density = 15
    nozzle_size = 0.4
    print_speed = 50
    print_temperature = 220
    print_temperature2 = 0
    print_temperature3 = 0
    print_temperature4 = 0
    print_bed_temperature = 70
    support = None
    platform_adhesion = None
    support_dual_extrusion = Both
    wipe_tower = False
    wipe_tower_volume = 15
    ooze_shield = False
    filament_diameter = 2.85
    filament_diameter2 = 0
    filament_diameter3 = 0
    filament_diameter4 = 0
    filament_flow = 100.0
    retraction_speed = 40.0
    retraction_amount = 4.5
    retraction_dual_amount = 16.5
    retraction_min_travel = 1.5
    retraction_combing = True
    retraction_minimal_extrusion = 0.02
    retraction_hop = 0.0
    bottom_thickness = 0.3
    object_sink = 0.0
    overlap_dual = 0.15
    travel_speed = 150.0
    bottom_layer_speed = 20
    infill_speed = 60
    inset0_speed = 0.0
    insetx_speed = 0.0
    cool_min_layer_time = 5
    fan_enabled = True
    skirt_line_count = 2
    skirt_gap = 3.0
    skirt_minimal_length = 150.0
    fan_full_height = 0.5
    fan_speed = 100
    fan_speed_max = 100
    cool_min_feedrate = 10
    cool_head_lift = False
    solid_top = True
    solid_bottom = True
    fill_overlap = 15
    support_type = Grid
    support_angle = 60
    support_fill_rate = 15
    support_xy_distance = 0.7
    support_z_distance = 0.15
    spiralize = False
    brim_line_count = 20
    raft_margin = 5
    raft_line_spacing = 1.0
    raft_base_thickness = 0.3
    raft_base_linewidth = 0.7
    raft_interface_thickness = 0.2
    raft_interface_linewidth = 0.2
    fix_horrible_union_all_type_a = True
    fix_horrible_union_all_type_b = False
    fix_horrible_use_open_bits = False
    fix_horrible_extensive_stitching = False
    plugin_config =
    object_center_x = -1
    object_center_y = -1
    [alterations]
    start.gcode = ;Sliced at: {day} {date} {time}
    ;Basic settings: Layer height: {layer_height} Walls: {wall_thickness} Fill: {fill_density}
    ;Print time: {print_time}
    ;Filament used: {filament_amount}m {filament_weight}g
    ;Filament cost: {filament_cost}
    ;M190 S{print_bed_temperature} ;Uncomment to add your own bed temperature line
    ;M109 S{print_temperature} ;Uncomment to add your own temperature line
    G21 ;metric values
    G90 ;absolute positioning
    M82 ;set extruder to absolute mode
    M107 ;start with the fan off
    G28 X0 Y0 ;move X/Y to min endstops
    G28 Z0 ;move Z to min endstops
    G1 Z15.0 F{travel_speed} ;move the platform down 15mm
    G92 E0 ;zero the extruded length
    G1 F200 E3 ;extrude 3mm of feed stock
    G92 E0 ;zero the extruded length again
    G1 F{travel_speed}
    ;Put printing message on LCD screen
    M117 Printing...
    end.gcode = ;End GCode
    M104 S0 ;extruder heater off
    M140 S0 ;heated bed heater off (if you have it)
    G91 ;relative positioning
    G1 E-1 F300 ;retract the filament a bit before lifting the nozzle, to release some of the pressure
    G1 Z+0.5 E-5 X-20 Y-20 F{travel_speed} ;move Z up a bit and retract filament even more
    G28 X0 Y0 ;move X/Y to min endstops, so the head is out of the way
    M84 ;steppers off
    G90 ;absolute positioning
    start2.gcode = ;Sliced at: {day} {date} {time}
    ;Basic settings: Layer height: {layer_height} Walls: {wall_thickness} Fill: {fill_density}
    ;Print time: {print_time}
    ;Filament used: {filament_amount}m {filament_weight}g
    ;Filament cost: {filament_cost}
    ;M190 S{print_bed_temperature} ;Uncomment to add your own bed temperature line
    ;M104 S{print_temperature} ;Uncomment to add your own temperature line
    ;M109 T1 S{print_temperature2} ;Uncomment to add your own temperature line
    ;M109 T0 S{print_temperature} ;Uncomment to add your own temperature line
    G21 ;metric values
    G90 ;absolute positioning
    M107 ;start with the fan off
    G28 X0 Y0 ;move X/Y to min endstops
    G28 Z0 ;move Z to min endstops
    G1 Z15.0 F{travel_speed} ;move the platform down 15mm
    T1 ;Switch to the 2nd extruder
    G92 E0 ;zero the extruded length
    G1 F200 E10 ;extrude 10mm of feed stock
    G92 E0 ;zero the extruded length again
    G1 F200 E-{retraction_dual_amount}
    T0 ;Switch to the first extruder
    G92 E0 ;zero the extruded length
    G1 F200 E10 ;extrude 10mm of feed stock
    G92 E0 ;zero the extruded length again
    G1 F{travel_speed}
    ;Put printing message on LCD screen
    M117 Printing...
    end2.gcode = ;End GCode
    M104 T0 S0 ;extruder heater off
    M104 T1 S0 ;extruder heater off
    M140 S0 ;heated bed heater off (if you have it)
    G91 ;relative positioning
    G1 E-1 F300 ;retract the filament a bit before lifting the nozzle, to release some of the pressure
    G1 Z+0.5 E-5 X-20 Y-20 F{travel_speed} ;move Z up a bit and retract filament even more
    G28 X0 Y0 ;move X/Y to min endstops, so the head is out of the way
    M84 ;steppers off
    G90 ;absolute positioning
    support_start.gcode =
    support_end.gcode =
    cool_start.gcode =
    cool_end.gcode =
    replace.csv =
    switchextruder.gcode = ;Switch between the current extruder and the next extruder, when printing with multiple extruders.
    G92 E0
    G1 E-36 F5000
    G92 E0
    T{extruder}
    G1 X{new_x} Y{new_y} Z{new_z} F{travel_speed}
    G1 E36 F5000
    G92 E0

     

  8. did you read my post #7 above?

     

    I'm going through that, and other posts in The Art of Printing section now. Great stuff! Incidentally I printed the pins again, a little slower, and they came out much better. No strings and much more uniformed.

     

  9. The screw should go into a square nut that's inserted in the back of the bent panel, above the hole. That might be missing, or misaligned.

    That did it. I also removed the two corner metal brackets, that hide the stepper motors, so I could get at the bent panel more easily. The other square nut was still taped in there, just out of place like you mentioned. All back together and printing again!

     

  10. Deformity might be caused by glass too hot.

    Strings: Did you have retraction enabled?

     

    I'm pretty sure I had retraction on. I'll try adjusting the speed and nozzle temp.

    I'll also try doing it on a cold bed with a layer of glue.

    Thanks for all the advice and input!

     

  11. Thanks for all the input! Having it print all the pins at once definitely helped. There was still a bit of deformity and strings between the parts, but nothing preventing them from being used. That being the case, I'm going to print them a few more times trying the other suggestions (brim and fans) to see how much better I can get them. Thanks!

     

  12. I was printing pins for the iPhone gear case thing (http://www.thingiverse.com/thing:65810) and for the small pins the print head would extrude plastic and push it around as a glob. This caused those pins to finish as pretty much balls of PLA.

     

    This is with the Normal quality print mode on my UM2. I also went into custom settings and set the time per layer to 10 seconds and with the same result.

     

    What else can I change to get a better result?

     

    photo 1

    photo 2

    photo 4

    photo 3

     

  13. During the fourth print on my brand new UM2, I noticed a screw laying on the bottom of the printer under the print bed. It looks like it came from the bottom of the z-axes platform (see picture with arrow), but when I try to screw it back it, nothing grabs. It seems like I'll need to take something apart to get at the nut it's supposed to connect with.

    Any advice? Am I correct about where the screw should go (see attached picture)? What do I need to disassemble to get there? Are there any disassembly instructions for the UM2?

    I know that the printer is meant to be taken apart and hacked, however, being so new with it I'm afraid of breaking it.

    Thanks

    The screw, where I found it while printing:

    The screw in quesion

     

    The hole I think it came from:

    Where I think the screw came from

     

  14. I'm excitedly unboxing my Ultimaker2 and following along with the instructions. It says that there are two cardboard pieces wrapped around the x/y axises. On mine there is one cardboard piece and two zip ties (on diagonally opposite ends) which seem to be holding the x/y axises in place. There is nothing in the instructions to cut them, however, step 11 says to move the printer head, which I cannot due to these.

    I'm assuming something has changed and the guide has not updated. Should I cut the two zip ties?

    Eagerly awaiting the answer. :)

     

  15. I got a UM2. As much as I love the idea of building my own machine from scratch and customizing it, my free time is limited and know that it would be more rewarding at first to get running and building quickly and homebrew later as I get my footing. I've been watching the 3D printer area for years and am amazingly excited to have my first one on the way!

    Looks like the reprap guide is a good place to start. Building stuff from thingiverse (and youmagine) will also be helpful, but I know there are things that many people don't know out the gate. Like the 45 degree rule and support structures. I can only imagine there are other things to learn and know as you go. Maybe I'll start to put together some sort of guide and lessons learned as I go.

     

  16. I just ordered my first 3D printer (an Ultimaker, of course) and while I wait for it to arrive I'd like to start learning all I can. I'm familiar with the basics and have some experience with Sketchup and CAD programs. Now I'd like to get into the nitty gritty, however I cannot seem to find many guides to 3D printing. I see a lot of of one-off topics across the internet and buying guides but have yet to find a complete guide to learning 3D printing. Perhaps I've been looking in all the wrong places.

    I've also been browsing thingiverse and collecting parts that I want to print and know that simply learning through experience will be valuable.

    What are your favorite resources and guides?

     

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