wiki:HotEnd

Hot End

The hot end we have been working on consists of:

V5

  • A steel bolt, with a 3.1MM hole down the middle, softened, drilled and reamed, with a flange on the entry hole.
  • A cylindrical aluminium heating block, annodized. there should be a hole down the middle of it for the steel bolt, as well as holes drilled in the side for the thermistor, and the set screw.
  • A set screw, for holding the aluminium heating block in place.
  • Nichrome wire.
  • Zirconium Silicate paste.
  • High temperature gasket sealant outer coating.
  • Four small copper terminal wires for the heater core and thermistor hookups.
  • Thermistor.
  • A Chiller, which screws onto the shaft to cool the shaft directly.

V6

  • A steel bolt, with a 3.1MM hole down the middle, softened, drilled and reamed, with a flange on the entry hole, and a 'nipple' on the end to mate with the nozzle (0.01 inch thick and long).
  • A cylindrical aluminium heating block, annodized. there should be a hole down the middle of it for the steel bolt, as well as holes drilled in the side for the thermocouple, and the set screw.
  • A set screw, for holding the aluminium heating block in place.
  • Nichrome wire.
  • Zirconium Silicate paste.
  • bisque fired porcelain shell coating the outside.
  • Two thick copper terminal wires wrapped around the aluminium block, for the nichrome.
  • Type K Thermocouple, partially embedded in ceramic and a wrap of kapton tape (for strain relief).
  • A Chiller, which screws onto the shaft to cool the shaft directly.

V7

This is our current design, we are still building prototypes of:

  • A steel bolt, with a 3.1MM hole down the middle, softened, drilled and reamed, with a flange on the entry hole.
  • A cylindrical copper heating block. there should be a hole down the middle of it for the steel bolt(threaded), as well as three 90 degree opposing threaded holes drilled in the top and bottom of the sides for the thermocouple, a set screw (to secure to the shaft), and another set screw (to secure the thermocouple).
  • A set screw, for holding the aluminium heating block in place.
  • A set screw, for holding the thermocouple in place.
  • Nichrome wire.
  • Zirconium Silicate paste.
  • high temperature gasket sealant outer coating.
  • Terminal wires (2) for the nichrome. these terminal wires will be looped around the kapton tape, and twisted to themselves.
  • shielded (grounded) Thermocouple. this must not be electrically connected to its casing.
  • kapton tape for seperating the nichrome wire from the heating block.
  • A Chiller, which screws onto the shaft to cool the shaft directly.

Bill Of Materials

  • four 3.1MM rasps (to smooth the hole in the bolt)
  • four 3.1MM drill bits (to cut a hole axially in the bolt)
  • copper stock (for the heat spreader, AND the chiller)
  • 10mm steel stock (for the shaft)
  • bucket o sand (for softening steel)
  • torch (for softening steel)
  • 1 WRX-31 thermocouple

lathe Automation

In order to economically produce physical hardware with consistant qualities

Media

Competition

Last modified 2 years ago Last modified on 09/23/14 23:14:51