Arcol blog Just another RepRap weblog

14May/12Off hotend v4.0.5 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:

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.



When a compiler reach the state, when it can compiles itself, it's called self-hosting.
My Hot-end v3.0 reached that state, and more:-)

30Oct/10Off Hotend v3.0 dummy model

This is a dummy model of Hot-end v3.0 to get a feeling of the actual size. A real hot-end cant be printed using plastic:)

28Oct/10Off Hotend v3.0

This is a really big announcement.:-) The new hot-end has been born, and rocks!

4Oct/10Off prototype v2.0

This design is almost final. It simply rocks, truely awesome!

Keep reading.

15Sep/10Off hotend prototype one

I was quite excited about my new prototype. Interested in my findings?

Keep reading.


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;-)


Mega filament holder

I designed a filament holder for my Mendel.


Series of disasters — Leaving the machine unattended

Everybody is expecting, the machine can be leaved unattended, just doing its job.
What could go wrong anyway?


Going blue

Some diversity or how Latin says: Varietas dēlectat.
But the reason is trivial: I ran out of the white plastic.