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Thermister (Why are we cutting into the barrel?)

Posted by Anonymous User

Anonymous User

Thermister (Why are we cutting into the barrel?)
January 10, 2008 11:07AM

Thermister (Why are we cutting into the barrel?)

I see two ways of mounting the thermister. One cuts into the tip, and one cuts into the barrel. Why does this part need to be below the surface of the metal? Can

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nophead

Re: Thermister (Why are we cutting into the barrel?)
January 10, 2008 12:00PM

Admin
Registered: 17 years ago
Posts: 7,879

If you hold a thermocouple to the extruder barrel you will find that the reading varies wildly where you put it, how hard you press etc. Embedding it seems like a good idea to get an accurate reading.

[www.hydraraptor.blogspot.com]

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degroof

Re: Thermister (Why are we cutting into the barrel?)
January 10, 2008 01:20PM

Registered: 16 years ago
Posts: 447

> I think I would like to just buy a nut that fits
> over the barrel. I could then drill a hole
> through the side of that nut and JB weld the
> thermister so it is in that hole sitting against
> the barrel.

Similar idea using a penny: [forums.reprap.org]

My current configuration is a thermistor wrapped in PTFE tape and strapped onto the barrel using a piece of twisted wire.