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Extreme under extrusion


nerdwarrior
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Posted · Extreme under extrusion

Hello,

I was printing my first print (a marvin), and my initial layers turned out horrid, like spider webs!

WIN_20160620_200625.thumb.JPG.725e65b41cab55489e1643926e443ad1.JPG

This was one of the nastier ones, but my first marvin had it as well, but it did go away once it reached the top. Does this have to do with the puddle of molten pla I found on top of my heater block? I'm currently using a UMO+

If you've got any tips, please reply!

So far, the one solution I've thought of is giving each print a nice, big brim so that it uses up all that horrible printing on that, and once my print starts, it is fine.

WIN_20160620_200625.thumb.JPG.725e65b41cab55489e1643926e443ad1.JPG

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    Posted · Extreme under extrusion

    Okay, the brim failed.

    I've tried temps from 190-215, heated bed from 55-60, and I've adjusted the bed height multiple times. Also, it works fine when I just manually turn the extruder.

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    Posted · Extreme under extrusion

    I've tested a few marvins with different settings, with one success and one successful to about the waist. It seems like it's a problem with the feeder. While printing, I see it rotating continuously, but filament isn't coming out. Tips?

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    Posted · Extreme under extrusion

    Tried printing at 230 degrees at 120% flow

    turned out great for the bottom layers, my dream come true

    then everything stopped extruding and i found it printing in midair

    no, not printing.

    just moving

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    Posted · Extreme under extrusion

    It sounds like you have an issue with the heater block. It should not have any plastic on the top of it.

    This means there is a leak somewhere or something is not aligned or installed correctly. Have you tried doing an atomic pull to make sure the nozzle is not blocked? If you do this you may see where the issue is.

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    Posted · Extreme under extrusion

    I'm not too far away from the bed

    that I know for sure cuz i've already scratched it on my third day of using it

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    Posted · Extreme under extrusion

    Hello Labern,

    Sorry, I didn't see your reply before I sent that comment just now

    I'll try an atomic pull, but I've noticed that the leaking has stopped.

    I think it's just that the filament doesn't extrude. It keeps grinding the filament, and when it doesn't, it still doesn't come out smoothly. I thought that maybe it was too far away from the bed, but I ended up going so close the nozzle scratched the glass.

    I've put some oil on the feeder, and stuck a small kleenex wet with oil onto the bottom so the filament going into the feeder gets lubricated.

    It just seems so unpredictable!

    How should I fix the feeder?

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    Posted · Extreme under extrusion

    Like I got one amazing/perfect print, but it stopped extruding halfway thru:

    WIN_20160621_180753.thumb.JPG.f798a1ccadee2aa16c844b805d2106ce.JPG

    (sorry about the horrible quality. My SD card slot is broken so I'm stuck with my computer camera)

    Now, it seems like the filament is going up the tube (it seems like it, but i could be wrong).

    When I turn it by hand, I can usually get nice, beautiful, even strings, but they never show up in my prints!

    WIN_20160621_180753.thumb.JPG.f798a1ccadee2aa16c844b805d2106ce.JPG

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    Posted · Extreme under extrusion

    I just looked at the nozzle

    It seems to be clear

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    Posted · Extreme under extrusion

    You don't want to lubricate the filament going into the feeder. That may just cause more issues and my introduce slipping. If the feeder is grinding then it probably means that it's not tight enough pushing onto the filament or really tight. Or there is a problem in the hotend so the filament can't push through.

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    Posted · Extreme under extrusion

    What temps and speeds are you trying to print with?

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    Posted · Extreme under extrusion

    Oh, okay.

    I'll get rid of the oil. Can I put it in the bowden?

    I'm printing at 230 and 50 mm/s (I don't remember exactly, but that's about it)

    The 230 because I thought it would flow better. 50 to match it.

    I don't know if it's the hotend. The odd thing about it is that every time I manually extrude, I get 2 puffs of smoke each accompanied by a sizzling sound before any plastic comes out.

    And thank you so much Labern for replying!

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    Posted · Extreme under extrusion

    oooh

    and it seems like my filament is stretched out (in the bowden tube).

    Do you think it will help if I reassemble the feeder, remove the filament with an atomic pull, then snap off all the stretched out parts?

    I can't really tell, because I've only had my printer (assembled) for a few days, and my experience is near zero.

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    Posted · Extreme under extrusion

    You can put oil in the bowden tube but this is normally done with flexible filaments like ninjaflex and you only need 1 drop.

    You may need to accompany some of your descriptions with some photos. What is the impression from the knurled feeder wheel into the filament? it should have between 2-3 indentations from the feeder wheel side by side.

    You should really remove all bad sections of filament.

    What filament are you trying to print with?

    The smoke sizzling may be coming from the oil, it can also be from high temps (maybe bad temp sensor) or you may have bad filament.

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    Posted · Extreme under extrusion

    I'm using the silver pla that came with the machine.

    I don't know about faulty sensors, because mine is brand new.

    I'll send filament pics once I'm done removing filament. In the process now.

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    Posted · Extreme under extrusion

    Sorry, this pic isn't very clear, but u can kinda see the bit marks and grounded parts.

    5a331e75cbd0e_strippedfilament.thumb.JPG.fb246c063d9ae7cb6cc3fb45176d98dc.JPG

    However, from what I can see, there doesn't seem to be a lot of plastic flakes in the feeder.

    5a331e75cbd0e_strippedfilament.thumb.JPG.fb246c063d9ae7cb6cc3fb45176d98dc.JPG

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    Posted · Extreme under extrusion

    In some places the filament has regular dashes on it, and in others, it is just simply ground out and feels flaky.

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    Posted · Extreme under extrusion

    Sorry but i cant see anything in the picture.

    If you remove the bowden tube out of the hotend and heat the nozzle up can you easily push filament though?

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    Posted · Extreme under extrusion

    O man

    I tried an atomic pull, and it started leaking like crazy and all the leaked pla smoked like never before.

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    Posted · Extreme under extrusion

    yeah the flilament goes thru.

    Except it's kinda hard in the beginning, because all of the plastic comes out from the top of the heater block. Once thru, it comes out just fine.

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    Posted · Extreme under extrusion

    Which one looks like yours after it pass through the feeder? It should look more like the one on the right

    sml_gallery_1527_132_70666.jpg.7542a6e8fb06466027cfaa98e9abcba1.jpg

    sml_gallery_1527_132_70666.jpg.7542a6e8fb06466027cfaa98e9abcba1.jpg

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    Posted · Extreme under extrusion

    the plastic should not come out the top of the heater block. only the end of the nozzle.

    Can you try to take a good picture of your hot end?

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    Posted · Extreme under extrusion

    looks like the left one, sometimes a bit more roughed up.

    the leak:

    leak.thumb.JPG.275f20d4e19d3a1abab27b6cfbea4d1c.JPG

    leak.thumb.JPG.275f20d4e19d3a1abab27b6cfbea4d1c.JPG

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    Posted · Extreme under extrusion

    oooooooo right hotend srry:

    hotend.thumb.JPG.f42aabf82ff4ba23c2e779323b949ec0.JPG

    hotend2.thumb.JPG.69d4c3023a4963f84dbe72d13d14cfe1.JPG

    hotend.thumb.JPG.f42aabf82ff4ba23c2e779323b949ec0.JPG

    hotend2.thumb.JPG.69d4c3023a4963f84dbe72d13d14cfe1.JPG

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    Posted · Extreme under extrusion

    if its like the left one then you need to increase the feeder pressure.

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