hotend

hi all,
can someone explain to me how the hot end works. what it looks like under all the kapton tape.
ta,
roger.

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Prusa 'Explorer' (3dStuffMaker), GEN6, J-head Mk III-B, Bowden Extruder, Marlin 1.0.0 RC2, Repitier-Host V0.84 and Slic3r 0.9.8, PLA. Live at Victoria, Australia.

Which hot end? There are many designs. They all basically work by heating up to the melting point of your material and forcing the feedstock through under pressure.

twitchy, not sure what sort i have - have sent email to find out.
is the hotend just a piece of steel with a hole drilled down the middle or is hollow instead. is it a thermister that does all the heating up work - is that just wrapped around the steel bit or does it go inside somehow.
and i suppose there must ne some sort of temperature probe as well.
does any body have a cut away drawing of one.
roger
what are the names of some of the designs - may be able to look for the names

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Prusa 'Explorer' (3dStuffMaker), GEN6, J-head Mk III-B, Bowden Extruder, Marlin 1.0.0 RC2, Repitier-Host V0.84 and Slic3r 0.9.8, PLA. Live at Victoria, Australia.

My printer uses a J head. A number of hot end designs are described here.

thanks twitchy thats great (i can never find anything from the reprap mainpage).
so looks like the brass end screws into the PEEK holder. then some PTFE tube goes up the middle. the filament slides inside the PFTE tube.
the thermistor goes in the very end of the brass bit. this (on mine) is then all covered in kapton tape.
mine also seems to have the heat sink.
roger

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Prusa 'Explorer' (3dStuffMaker), GEN6, J-head Mk III-B, Bowden Extruder, Marlin 1.0.0 RC2, Repitier-Host V0.84 and Slic3r 0.9.8, PLA. Live at Victoria, Australia.

Roger,

The one your machine is J-head Mk III-B.

ta 3

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Prusa 'Explorer' (3dStuffMaker), GEN6, J-head Mk III-B, Bowden Extruder, Marlin 1.0.0 RC2, Repitier-Host V0.84 and Slic3r 0.9.8, PLA. Live at Victoria, Australia.