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CoreXY simulation - Pre-project tiny printer Halenia

Posted by PRZ 
CoreXY simulation - Pre-project tiny printer Halenia
January 23, 2016 07:06PM
I made a pre-project for a micro sized coreXY printer with a 100x100x100 usable volume (1l)
Yet this is an 'on hold' project but I think the CoreXY simulation is of interest.

I made a simulation and you can see a film of it here [github.com]

The printer in this simulation looks like this :

And you can see a film of it here : [github.com]

I am not sure that coreXY mechanism offer any advantage over a delta for such a small printer. However, it could be an inspiration for a larger size printer, but as a pre-project, parts are not finished, the modules for parts are not separated in the program, so there is a lot of work to go to realization.

The fundamental ideas for the mechanical design is to have multi-functional parts.
Also, for a small printer, the sliding mechanisms could be constitutive of the structure, which simplify the ensemble, as is done on some deltas (Rostock type).
It is not a derivative of any other project, however I had a close look at the SmartCore, which was inspirational even if Halenia details are quite different.

For the CoreXY demonstration, I have used a characteristic of OpenScad, which is the transparency of parts is only calculated against parts which have already been calculated. This often give very odd viewings, but here it was used to improve the visualization of the coreXY system.

The direct drive extruder, also of own design, is effectively used in one of my printers, the 'D-Box' [rouzeau.net] . The fixation have been modified to be installed on the Halenia.
I hope to publish this extruder with multiples attach variations soon.

The hotend does not exists, but I will realize it one day for a delta.
The nozzle will be the 'Fisher delta' all metal nozzle, which is well performing, but it will be screwed in a cubic finned cooling block, in the style of the 'Chimera' hotend, but with top attach. The nozzle is threaded in M4, but instead of former nozzles from RepRaPPro, it does have a real heat break, which allow it to go up to 300°C, with a relatively limited cooling flow, hence a silent hotend. I am printing with it mainly PETG, with a sustained temperature of 285°C. 5m3/h cooling airflow is ok with a super-silent Sunon 25x25x10 fan.

The OpenScad library, [github.com] which is an own development, is used in all my projects, and while not officially released, is available on this project and others, and could be considered now as relatively stable.

See on the OpenScad Delta simulator how to manage simulation and make films.
There is a VirtualDub file configuration in the package.

All the info are available here : [github.com]

I added the image in the reprap wiki CoreXY page : [reprap.org]

This page needs a lot of work.

I would have liked to transfer an image of the SmartCore from GitHub, unfortunately, there is no licence for the documentation of the Smartcore, only for the program (without even a revision), and the licence of the wiki is uncommon (GFDL 1.2).
As a general request to everyone, when you publish docs, please set a licence, which will allow reuse. I work on the wiki and the licence problem is a brick wall to use images.

Ah, and the name. Till now, I didn't give fancy names to my printers, and I decided to improve. I was in search of flower name, and the Halenia is a gentiane with 4 petals. I will rename the HXM with 6 petals flower name.


- Safety [reprap.org]
- Embedded help system for Duet and RepRap Firmware [forums.reprap.org]
- Enclosed delta printers Lily [rouzeau.net] and Lily Big [rouzeau.net]
- OpenScad delta printer simulator [github.com]
- 3D printing on my site [www.rouzeau.net]

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