Kossel_T v1 - Merlin

In each  design work there is a time when you

mast stop drawing and start printing. (c)

In one day 3 month ago, one of mine ebay buyers told me - "That's would be cool to build Kossel but only extrusion that I could buy here is 20x20mm from China"  and I told him that I could easily change Kossel design for him. How naive I was. So this is a story how that project was started.

It`s first aim was to make Kossel  design more parametric. But I don`t like idea to make everything in printer from extrusion, and some other things... So now this project goes by parallel course with original Kossel (it was funny to see Johann`s "four parts in one" week after I start coding mine "solid frame" version)

Changes in design:

1. Design is parametric. Not as good as Mendel90. But I would try to make it as easy to use as I can.

2. Normally its made to fit 20x20 extrusion/tubes.  15x15 and all the rest dimensions is a by product of parametric design. They could work or not. But mostly they should.

3. Extrusion  on vertical beams was changed to cold steel square tubes. They are cheaper (4USD for 6m tube) and could be found in most "metal shops".

4. Main design was made for using vertical square tubes and flat sheets for horizontal frame pieces. But u could also make frame_thickness parameter in configuration.scad equal to extr and use extrusion for frame.

5. As current design is mainly made for tubes, tensioners were integrated in upper frame part.

6. Some slightly changes that I think would help makers to build it easier.

So hear we go - files on github

integrated tensioner