So I got my nozzle clogged.  The Spitfire on Bukobot duo, .35mm nozzle size.

3D Printing
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So I got my nozzle clogged. The Spitfire on Bukobot duo, .35mm nozzle size.

I tried a cold pull using T-Glase, it did clear it some but it is still partially clogged (after may attempts at doing a cold pull using the instructions from the wiki at http://bukobot.com/nozzle-cleaning). Now it spits out 2 beads of plastic, one “straight” and one all squigly, so I think the clog is in middle of it somehow.

Question I have, if the cold pull did not work all the way using t-glase, is there a chance it could still work if I purchased some nylon 216? Wondering if I should get some 216 or just get a new nozzle.

Also, I wonder if I actually deformed the tip, how easy (or hard) is it to accidentally deform a tip? I usually use wire cutter pliers to get the gunk off of the nozzle when it is hot but now I’m wondering if that was a bad idea ™? With how it does a “split stream” I wonder if I squeezed the tip closed in the middle somehow.

EDIT: Oh yeah, and since not much comes out, the drive gear skips when attempting to extrude.

2

I would pick up a 0.35mm drill bit and a pin chuck, then carefully run it through to clean out the rest of the gunk in the nozzle.

3

Bukobots instructions using nylon have not yet failed me.

4

Sounds like you at least have something in there that will need to be dislodged with a wire. I’ve never done cold pulls with PET, but it doesn’t seem like it would be particularly good for that purpose. ABS/PLA would probably be better, by Nylon 618 is king for that.

5

We managed to get one blockage that took 8 cold pulls AND a wire to clear. But it did get cleared.

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Thanks! I tried using wire but could not find any small enough. Wire I did find was measuring at .40mm. Will look around some more to see.

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@Jonathan_Foote I usually pluck a bristle from a small wire brush, though I’ve also got some acupuncture needles on order that look like they might be ideal.

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I tried this in the past with T-Glase and it didn’t work. However, the Taulman 618 did. You might want to retry with 618. The other thing I do is keep pushing the filament into the nozzle while it cools and once it sets, pull it (takes some pulling, but works really well) hope that helps.

9

Yeah, continuing to push the filament as it cools helps, especially with 618 that has absorbed some moisture.