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removing nozzle issue  

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nate.l
(@nate-l)
Eminent Member
removing nozzle issue

I was printing bamboo this week and came into see a print that was moving but not extruding. Figures it must be a nozzle jam so I followed the steps to remove the nozzle. Got everything off, heated up the nozzle to 200 but I cannot for the life of me get the nozzle off the heating block. I have a spanner wrench on the heating block and a pair of pliers to turn the nozzle just like in the instructions but the nozzle won't budge. I don't want to apply too much force as the pliers will just slip on the brass nozzle. Am I doing something stupid like turning the wrong way? I am turning to the left or counter clockwise. Sry pic below is sideways. Any suggestions would be great!

Posted : 26/02/2017 10:27 pm
Elfan
(@elfan)
Active Member
Re: removing nozzle issue

Hi,
Instead of using the pliers to unscrew the nozzle, try the 7 mm spanner. It's a lot better and it won't scratch the nozzle as the pliers.
Unscrew to the left. If it's stuck, try to preheat the hotend to higher temperature like 230°C.

Posted : 27/02/2017 12:04 am
JeffJordan
(@jeffjordan)
Member Moderator
Re: removing nozzle issue

when i change the nozzle (did it this weekend because of a complete hotend "service"), i hold the hot (as hot as it goes) heater block with a 24mm wrench at its front and back surface (not the sides, where you got the thermistor and the heater peeking out) and use a 7mm nut to loosen the nozzle.

best would be to disassemble the whole extruder body and span the hotend with its cooler into a bench vice, while it's electronics are still connected to the rambo, like tom does in his how to video.

dem inscheniör is' nix zu schwör...

Posted : 27/02/2017 12:29 am
nate.l
(@nate-l)
Eminent Member
Topic starter answered:
Re: removing nozzle issue

Thanks so much, totally worked, 7mm nut got it unstuck, funny how I couldn't do it with pliers. Any recommendations for a more robust nozzle? Is there a certain brand that most people use when printing with metal filaments that works well?

Posted : 27/02/2017 2:02 am
JeffJordan
(@jeffjordan)
Member Moderator
Re: removing nozzle issue

💡 look at the link that i posted above. there thomas sanladerer gives some infos about other nozzles.
furthermore there are some threads here about hardened, stainless steel and other types of nozzle.

💡 unless you are dealing often with exotic filaments (like carbon fibre), i personally would stay with the brass nozzle. it provides very good heat conductivity, suits for the most filaments and is cheap to replace.

dem inscheniör is' nix zu schwör...

Posted : 27/02/2017 11:39 am
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