HEVO Hotend Evolution

UPDATE 4/25/2020:

I added a radial fan shroud to block any airflow hitting the print below just because it can't go anywhere else.

After enjoying my stock HEVO's for some time I decided to do an upgrade of the hotend mount. A good hotend drives a lot of improvements.

Original Design:

- Hotend is too far away from the x-rods

Issues:

- Could causes additional flex and movement on the hotend.


- Requires the print bed to be moved forward to get max print volume

Hotend Evolution:

- Hotend is as close as possible to the x-rods


- Printbed can be moved further back less cramped up front.

Original Design:

    - Installing the X-min endstop requires soldering

Issues:

    - Requires customization of the optical switch (removal of connector, etc)

Hotend Evolution:

- No modification to the optical end-stop is needed.


    - X-Max end-stop was removed

Original Design:

    - Inductive probe moves around when hotend is removed

Issues:

    - Inductive probe needs to be calibrated after work is performed

Hotened Evolution:

- Probe has it's own mounting system and maintains fixed during hotend maintenance.

Original Design:

    - Cooling fan is blowing on hotend

Issues:

    - Need to direct air stream onto intended area


- If there is a print issue it can melt the air duct

Hotend Evolution:

- Leverages the "TUSK" technology to direct air to the intended area

Original Design:

    - Uses stock 30mm cooling fan

Issues:

    - May experience heat creep up the heat break and cause blockages

Hotend Evolution:

- 40mm fan mount is integrated in the design.  


- Uses a shroud to prevent air back flow onto the print bed (don't skip this)