How to perform a nozzle change correctly ?

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How to perform a nozzle change correctly ?

Postby peterbako » Wed Mar 22, 2017 9:33 pm

I'm looking for instructions/tips on how to change the nozzle without breaking anything on a N2+ V2 hotend.

Is it better to remove the hotend before changing nozzle?
Or using the 3d printed tool to fix the heater block and just unscrew? Does is need to be hot or cold when releasing and tightening the nozzle to prevent leakage ?

Thanks for advice.

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Re: How to perform a nozzle change correctly ?

Postby walshlg » Thu Mar 23, 2017 3:49 pm

It MUST be done hot. Personally, I think it is safer to do it while in the cold end.

TIP: find a medium sized pair of vicegrip pliers, tape thin (1/8") strips of wood to the heads using Kapton tape. Then you can use these to dial in the right amount of force to hold the hotend and keep it from cooling too quickly. Then you hold the hotend with these pliers and use a wrench to remove the nozzle. Same thing for inserting a new nozzle as it must be hot and snug to ensure it seals tightly against the bottom of the isolation tube. Check occasionally, especially after print failures as , no kidding, the nozzle can work itself loose!

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Re: How to perform a nozzle change correctly ?

Postby Vicky@Raise3D » Thu Apr 13, 2017 10:28 am

Maybe a little late reply, but still want to share the links in case some one else search this thread for nozzle changing.

Both disassembling and assembling hotend have its only steps. Please check the instruction video carefully.
If you feel any resistance during the process, do not apply too much force on throat tube. You can heat the nozzle first, so that the filament inside will become soft.
And after finish assembling, heat the nozzle again and tighten it one more time to make sure it is well tightened.

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