It has an awesome half circle groove which is a perfect fit for the filament.
I use a normal 608 bearing, so it fits to a Wade style filament pusher exactly, like
the Greg's accessible extruder body (thing:8252). Here is a closeup picture:
And also a picture with the hyena:
Why is it an awesome thing to have?
- It prevents filament twisting
- It is a guide in itself, Accessible Greg's extruder, needs one I believe, at least for me its needed. (accidents happen:-(
Well, this small improvement may not deserve a full campaign, like the awesome mini hyena, but still what do you think what would be an adequate price for it?
If you have a thought about pricing, or more what price is it worth for you, just put it in the comment. If we can agree on a sane pricing, I will list at that price on the webshop:)
Lets do it folks!
Im not worried about wall thickness here, it is imho pretty strong still.
If you have any other question just shoot it in the comments:)
Arcol.hu v4.0 hot-end for 3.0mm filament (works also for 1.75mm filament too).
It has been a long time since I announced v3.0.
The new features:
- - Hot-zone is completely metal.
- - high temp extrusion should be possible, like pp, hdpe, plexi, polycarbonate, nylon (hopefully, this will be confirmed within a month)
- - shorter, more compact, a comparison photo between v3.0 and v4.0:
- - easier to assemble
- - reworked nozzle
- - laping for wrenches on nozzle, on stainless steel, heatsink
- - built for easy maintenance
- - self cleaning (you can remove the hardened plastic using two wrenches:)
- - built with dual extruder in mind
- - mounting compatibility for the average/stock reprap hotends
- - 100k thermistor (which seems to be a more common preference)
For assembly instructions please read here:
Dropped compatibility for Rapman, Makerbot. A new mounting needs to be designed for these machines.
For rapman a 200k thermistor also needs to be sourced to be electrically compatible.
The brass one is the new version:)
You mount it with a M8 nylock nut, so the width of your extruder does not matter.
Key advantage over the old version
- It's machined from straight, round brass stock. Regular bolts often have large tolerances and are not entirely straight. The hyena is guaranteed to be straight.
- Each tooth is individually machines, so there is no "orphan tooth". An orphan tooth is an incompletely cut tooth that occurs during hobbed bolt production with a tap, because the teeth of the tap do not match the diameter of the bolt while cutting. This is a problems because it's the spot where filament begins to slip. It tends to bite a small piece of plastic off the filament as it does not reach deep enough to grip. The next (normal) tooth continues eating into the filament, resulting a complete filament strip, and no printing. The hyena prevents this by making sure every tooth grips by the same amount.
Installing on a Wade style extruder
(Also take note the really useful and special M8 nut. It will be the subject of an another announcement:)
Im a technical guy, any drawings?
I have been working on the planet furiously during the whole week.
I later read on a forum (I've forgotten which one), that the printed replacement part will break as it could not possibly be as strong as the original one. That did had some truth to it...
This is a dummy model of Arcol.hu Hot-end v3.0 to get a feeling of the actual size. A real hot-end cant be printed using plastic:)