TPU Clogging

By Travis7s
April 16, 2019 in UltiMaker 3D printers

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Travis7s 25

Posted April 16, 2019

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Posted April 16, 2019 · TPU Clogging

I've had real trouble with Ultimaker TPU clogging gradually on my UM3. Even with a brand new Printcore and bowden tube that has only seen TPU, I find that after a day or 2 I will get subtle underextrusion. You can't see it by eye but the parts are significantly weaker/squishier. Eventually the nozzle will clog enough that the filament jams back at the feeder A hot and cold pull will fix but only for a day or two. Any tips of preventing this?

Side note, I find it annoying that the printcore doesn't preheat when unloading TPU. Half the time its too stuck in the nozzle to break free and the filament grinds and you have to throw away a few feet.

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