J Head Nozzle
Revision as of 19:27, 5 May 2011 by Reifsnyderb (talk | contribs)
J-Head Nozzle
Release status: experimental
Description | J-Head Nozzle and Thermal Barrier Based on a combination of ideas from the Makerbot Mk 5 hot end, The Inline Heater Variation, some ideas from Brian Briggs, as well as myself.
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License | GPL
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Contents
Introduction
UNDER CONSTRUCTION
More information coming soon.
Bill of materials
Quantity | Part | Description |
1 | Brass J-Head Nozzle | Machined Brass Nozzle/Heater Combination |
1 | PEEK Insulator | Machined PEEK Insulator |
1 | PTFE liner | 1/8" ID, 1/4" OD PTFE tubing |
1 | Heater Resistor | (coming soon) |
1 | Support Washer | Optional 1/2" Fender Washer |
Machined parts
More information coming soon
J-Head Nozzle
Thermal Barrier
Machining
More information coming soon
J-Head Nozzle
- Find the center of the axis of the nozzle. This can be done by various means ranging from using a milling machine to using marking fluid, a height gauge, and a surface plate.
- Mount the 5/8" brass bar stock in a 4-jaw chuck on a lathe. Adjust the chuck so that the nozzle axis is on center.
- Turn the threaded end of the nozzle down to 0.375 +0.000 -0.004.
- Thread the nozzle to 3/8-24 up to the shoulder of the heater section.
- Drill out the center of the nozzle.
- Turn off the last 2 to 3 threads at the end of the nozzle and cleanup the threads.
- Remove the work piece and mount it by the threaded end so that the threaded end is centered in the lathe.
- Machine the nozzle tip to the desired profile.
- Drill the nozzle orifice.
- Mount the nozzle in a milling machine and mill off the excess material in the heater section.
- Drill out the holes for heater resistor and thermistor.
Thermal Barrier
- Cut a piece of PEEK to length.
- Drill out the PEEK to within ___ of the end using a ____ drill bit.
- Using a ___ drill bit, drill out the end to a depth of 0.550.
- Internally thread the end to 3/8-24 using a bottom tap.
- On the end, turn a 0.500 -0.000 +0.003 shoulder for a distance of approximately 0.050. This is to center the optional support washer.
- Remove the PEEK thermal barrier and reverse the ends in order to machine the opposite end.
- Using a 60 degree center drill, or other means, drill a tapered filament entrance in the end.
- Finish the thermal barrier by drilling out the end to 3.1mm.
Assembly
Notes
See also: Extruder Nozzle Variations