Mk2s leaking above the ally ext block
 
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Mk2s leaking above the ally ext block  

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mick
 mick
(@mick)
Active Member
Mk2s leaking above the ally ext block

On long jobs i am getting excess build up of filament on the ally block that holds the nozzle. It appears below the cooling fins and pools on the ally block top. Eventually it drips down and hangs off the bolt behind the nozzle like a iceikle thus catching jobs and causing imperfections.

Is this a common issue and does anyone have any advice how to sort it? The printer is absolutely fantastic so far apart from this issue and i have been cleaning the area when pre-heating to stop it affecting short jobs as a needle file picks it up nicely in lumps.

Any advice would be very appreciated as i can not see any areas where it could be loose etc thus causing a leak

Thanks in advance

Posted : 01/12/2017 6:53 pm
JoanTabb
(@joantabb)
Veteran Member Moderator
Re: Mk2s leaking above the ally ext block

dissassemble the extruder, taking care not to damage the heater cartridge and the thermistor (especially fine wires.

remove waste filament,

if desired use coppaslip or similar high temperature lubricant on the heat block threads and non setting heat sink paste on the cold end threads

insert nozzle all the way into the heat block, then unscrew nozzle nozzle 1/2 turn

insert heatbreak into heater block, all the way,

reassemble other components,

restore extruder to printer,
heat extruder to 240 + degrees,

tighten nozzle against heatbreak, whilst preventing the heat block from rotating, using a spanner on the heat block, and a socket spanner on the nozzle

I try to make safe suggestions,You should understand the context and ensure you are happy that they are safe before attempting to apply my suggestions, what you do, is YOUR responsibility. Location Halifax UK

Posted : 01/12/2017 9:13 pm
mick
 mick
(@mick)
Active Member
Topic starter answered:
Re: Mk2s leaking above the ally ext block

Brilliant Thanks for the help. Exactly what i needed to hear 😎

I am running a ruby btw so this wont affect anything will it?

Thanks
Mick

Posted : 02/12/2017 12:46 am
JoanTabb
(@joantabb)
Veteran Member Moderator
Re: Mk2s leaking above the ally ext block

Hi Mick,

I haven't studied the ruby nozzle if it's 6mm thread was slightly shorter than the original nozzle, then the ruby nozzle could have tightened against the heatblock before the end of the nozzle sealed against the end of the heatbreak tube, which could have been the root cause of your issue

regards Joan

I try to make safe suggestions,You should understand the context and ensure you are happy that they are safe before attempting to apply my suggestions, what you do, is YOUR responsibility. Location Halifax UK

Posted : 02/12/2017 1:20 pm
mick
 mick
(@mick)
Active Member
Topic starter answered:
Re: Mk2s leaking above the ally ext block

I suspect that is the case as i installed it pretty much from new. It did screw in until it hit the block and the standard nozzle had a little gap when tight so it may well have shorter threads

Thanks
Mick

Posted : 02/12/2017 2:37 pm
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