1 Topic by cscheide

  • cscheide
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Topic: Thermocouple ?

I see in the instructions where it says to insert the thermocouple into the hole on the brass head.  I don't have a hole so I need to drill a 1/16" hole.  I am assuming that the only part I have left is the thermocouple.  it has 2 blades, do I need to drill 2 holes or does this sound like the wrong part.  Can anyone post a pic of the thermocouple?
thanks

2 Reply by elmoret

  • elmoret
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Re: Thermocouple ?

Blades go to the controller, they're labeled positive and negative.

One 1/16" hole.

Filastruder - the robust, inexpensive filament extruder
E3Dv6 All Metal Hotend - the premier 3D printing hotend

3 Reply by cscheide

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Re: Thermocouple ?

Got it!  Thanks for the quick reply

4 Reply by RISI (edited by RISI 2015-02-07 11:00:43)

  • RISI
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Re: Thermocouple ?

Actually, For safety reasons it might help if you insert the thermocouple onto the heater itself.

It's safer to measure the 'powered' heater source and compensate for the nozzle,
rather than to measure the nozzle and compensate for the dangerous heater.

The last time the sensor fell out from the tiny hole in the side of brass nozzle, it's hard to keep it there, and our filastruder overheated badly, burning the filament inside to near solid. we had to burn it in a Butane Fire Furnace to get all the charred melted plastic out.

If you're worried about temperature accuracy, We measured the temperature of the nozzle and the heating element, the temperature difference is 5 to 10 Degrees C lower at the nozzle than the heater, so you can
compensate accordingly if you want.

But yes, please consider puting the sensor at the heating element for your own safety,
if you put it at the brass nozzle, make sure you tie it in with something so it doens't fall out and burn out your heater.