Arcol.hu hotend v4.0.5
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:
http://wiki.arcol.hu/arcol-hu-hot-end-v4-assembly
Regressions/future adaptations:
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.
Hobbed bar, hyena v1.0
This is my take of a new hobbed bolt replacement 
I call it the hyena, because hyenas have the strongest jaw of all mammals.
All teeth are cut individually:
Here is a comparison photo with one of my hobbed bolts:
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
Some pictures, from the top:
Also when opened (please note the washers around the bearings!):
(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?
Here it is:
Self-hosting
When a compiler reach the state, when it can compiles itself, it's called self-hosting.
My Arcol.hu Hot-end v3.0 reached that state, and more:-)
Arcol.hu Hotend v3.0 dummy model
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:)
Arcol.hu Hotend v3.0
This is a really big announcement.:-) The new hot-end has been born, and rocks!
Wade’s machined bolt version 1.3
This is only a small update about Wade's machined bolt manufacturing.
Heated bed kit v1.7 – laser cutted z-switch holder
This is a small upgrade of the heated bed kit compared to version 1.6.
I do believe I worked out all the caveats, and possible weak points of the design.
Heated bed controller
As almost all my previous buyer built a heated bed controller, and at least Bogdan have built one, nophead is using his brain controller to handle the heated bed temperature. So there left no choice, but build my own;-)
Heated bed v1.6 – Thermal insulating and more
It took me more time then I thought, but finally, I built my improved heated bed.
The initial test shows, the bed's temperature can go up to 164.3C, which is pretty hot:-)
(on the picture it only shows 148.7C, but it is because I already disconnected the transformers from
mains, so it already cooled for about 3-5mins.)
Worst smelling filament ever (updated again)
I received half kilogramm sample straight from the factory, from India. The cross section is perfect, but the smell...
