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DIY Hot-End for Geared Extruder - Basic tools only. October 28, 2010 09:58AM |
I made a New Hot-End last night loosly based on Adrians new model, but with a few changes to make it easier to make with just a Drill Press.
It also uses the raw material parts I could find on Ebay for a few £ instead of expensive stock.
Hopefully more people will try to make their own or maybe even design a Dual Hot-End Extruder...
I first had a go at some heater blocks. -
On the left was an attempt to make a Clamp version, but it was a bit big and didn't clamp very well around due to the mass of Brass and the short cut slot.
In the middle was just about right, but I over-drilled the hole so tapping was not going to be good, but it was a easy part to make in the drill press and using HEX brass stock, note the small hole for the thermistor.
Clamped in Vice with level support under the PEEK then drilled with a Woodworking drill bit on the Drill press.
Repeat with the other holes in the PEEK (My spacing is to match the Aluminium clamp, and they are not the same as the mounting holes on the WADE extruder)
PTFE drilled with a 3.2mm hole and tapered (filed and sanded) to make a snug-fit into the bottom of the Extruder.
Remeber to dish the PTFE enrty hole so the filament can fint it's way into the hot-end easily.
And you need to Drill and tap (M6) a small way (I did 5mm) into the PFTE for the heater barrell, you don't need it to go a long way into the PTFE as the PEEK is doing all the support and most of the heat-sinking.
The Aluminum clamp provides support for the PEEK and aids to mechanical fixing to the Extruder and also constrains the PTFE . It also should help with Heat-sinking.
Just after I put this on the Blog I spotted that Giles Bathgate did a similar thing, nicely documented here - Extruder Nozzle Variations - (Giles Bathgate)
Maybe it’s worth putting up my attempt on the Wiki, but let me test it first… More info and pic's on the Blog.
[richrap.blogspot.com]
It also uses the raw material parts I could find on Ebay for a few £ instead of expensive stock.
Hopefully more people will try to make their own or maybe even design a Dual Hot-End Extruder...
I first had a go at some heater blocks. -
On the left was an attempt to make a Clamp version, but it was a bit big and didn't clamp very well around due to the mass of Brass and the short cut slot.
In the middle was just about right, but I over-drilled the hole so tapping was not going to be good, but it was a easy part to make in the drill press and using HEX brass stock, note the small hole for the thermistor.
Clamped in Vice with level support under the PEEK then drilled with a Woodworking drill bit on the Drill press.
Repeat with the other holes in the PEEK (My spacing is to match the Aluminium clamp, and they are not the same as the mounting holes on the WADE extruder)
PTFE drilled with a 3.2mm hole and tapered (filed and sanded) to make a snug-fit into the bottom of the Extruder.
Remeber to dish the PTFE enrty hole so the filament can fint it's way into the hot-end easily.
And you need to Drill and tap (M6) a small way (I did 5mm) into the PFTE for the heater barrell, you don't need it to go a long way into the PTFE as the PEEK is doing all the support and most of the heat-sinking.
The Aluminum clamp provides support for the PEEK and aids to mechanical fixing to the Extruder and also constrains the PTFE . It also should help with Heat-sinking.
Just after I put this on the Blog I spotted that Giles Bathgate did a similar thing, nicely documented here - Extruder Nozzle Variations - (Giles Bathgate)
Maybe it’s worth putting up my attempt on the Wiki, but let me test it first… More info and pic's on the Blog.
[richrap.blogspot.com]
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