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edit: custom printer with 2 hitends (generic ptfe lined and genuine e3d v6 all metal). verified same temperature. e3d v6 oozes to the point that its unusable, generic works well.

steps taken verified temps are identical with external probe changed nozzles rebuilt by to ensure no gaps checked v6 hearsink cooling changed retractions. settings.

original: I've got a custom dual extruder machine - I've calibrated the temperatures of both hotends so I know the temperatures are very accurate.

One is a regular hotend similar to an Ender 3 setup and the other is a genuine E3D v6 - and I've checked the assembly many times.

At 190 °C, my external mp probe reads 190 °C on both. with PLA at 190 °C in the Ender 3 style hotend, pushing filament through by hand is smooth but requires some push and the oozing stops very soon after. on the E3D hotend, no effort is required and it will continue to ooze filament for quite a while.

I've checked and double checked the temperature, changed nozzles, checked and double checked assembly and Bowden tube seating position and I'm at a loss as to how to get this E3D v6 to stop oozing because it seems to just drip even at low temperatures, retractions do nothing and the prints with that extruder are messy.

Any advice on how to get this thing to stop oozing would be greatly appreciated!

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  • $\begingroup$ When a hotend is hot, filament leaks out, that is just a given. Retraction and standby temperature (considerably lower than the printing temperature) can be used to fight the oozing. I have non-genuine E3D v6 hotends which also ooze at print temperature and filled nozzle chamber, retraction helps a little, there is always molten plastic that will come out. You're just lucky one hotend doesn't leak. $\endgroup$
    – 0scar
    Jan 23 '20 at 8:33
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    $\begingroup$ This has been asked before, so don't be surprised if the community will vote for a duplicate, see e.g. When dwelling G4, my printer is oozing, how can i stop that? or this one Ender 3 extrudes plastic whilst at standstill, and while moving to start of print. $\endgroup$
    – 0scar
    Jan 23 '20 at 8:40
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    $\begingroup$ Without retraction, oozing is unavoideable. Retract some length. $\endgroup$
    – Trish
    Jan 23 '20 at 9:52
  • $\begingroup$ Does this answer your question? When dwelling G4, my printer is oozing, how can i stop that? $\endgroup$
    – Trish
    Jan 23 '20 at 9:53
  • $\begingroup$ thanks for the comments and recommendation of a similar question - however that doesnt quite help. I'm asking more specifically what can be done with the v6. I understand why there is ooze and why it cant be completely stopped - but when comparing it to my cheap hotend which doesnt ooze nearly as much as the e3d v6, it takes no force to push filament through the v6 but there is some resistance pushing it through the cheap hotend at the exact same temperature and same nozzle size. the cheap hotend stops oozing very soon, the e3d just continues to drip. $\endgroup$
    – Korner19
    Jan 23 '20 at 12:13

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