How to remove broken temp sensor from nozzle block?

[gwfong 0]

My temp sensor wire broke at the metal sheath. I heated up the block and tried pulling the metal sensor out but all I ended up with was the internal wire. The outer sheath is still stuck inside the block.

The only thing I have that is that thin are tweezers. They cannot get an good enough bite on the metal sheath for me to pull it out.

I do have drill press, so I can drill straight and accurate. I was thinking about getting a bit in there just large enough to break up the metal. Short of doing this, I don't know what else to do.

Any ideas?

I have a UM2. And I'm referring to the stock nozzle, not the olsson.

Thanks

Gary

Edited October 5, 2017 by Guest

[geert_2 558]

I once read about people drilling a small hole from an opposite side into the nozzle, or in an angle, so that the sensor could be pushed out from the back? I never had to remove a sensor yet, so I am not sure if this would work? Anyway, you would need to take great care that you don't drill through the filament feeding channel, nor come too close to it (could hurt heat distribution).

Using dislodging oil, and very gently tapping (not hammering!) on stuck parts to make them loose, might also help: this is commonly done in old cars, to dislodge corroded screws. The very light tapping for some time breaks the bonding due to oxidation. So I would try this first.

[tinkergnome 927]

Hi Gary, here are some suggestions that may be useful:

https://ultimaker.com/en/community/8374-temperature-sensor-stuck-um2#reply-69983

https://ultimaker.com/en/community/8374-temperature-sensor-stuck-um2#reply-108902

[gwfong 0]

geert_2 and tinkergnome, these are great. I've already ordered the anti-freeze. And I like the screw idea. Nice and simple.

Thanks