Kossel 2020 Build log

I have been logging my build at the Google Groups site, but the lack of ability to edit a post has me looking for an alternate site.

Background:
I have build 2 mini Kossels. The first was cmpletely stock and follwed the directions. The second was to see how cheaply I could build one. It uses printed PLA sliders which I upgraded to Nylon with Brian H. sent me a set to try. I'm not looking to scale it up to a Kossel and use Misumi 2020 extrusions.

Design goals:

1. Modify the current Johann mini Kossel files to use 2020 extrusions - github of parts
2. Use PLA sliders to have an evaluation test matchine
3. Use an X5 controller - Arduino/RAMPS for sale :)
4. Update my visual calculator for 2020 and the customized parts
5. Have a 9" build surface diameter
6. Use M3 t-nut and machine screws - I already have a cache of M3 screws. Longest screw needed M3x20mm

Progress:

• Version 0.5 of the parts are designed and printed - it took a few iterations and several test parts to get here
• Partial assembly and most of the parts in in hand - missed a few important parts and some didn't work out (5mm OD Bowden tube)
• Photos posted

Using my Visual calculator, and using the most current parts here is my machine specs:

• Horizontal extrusion length: 342.9mm
• Vertical extrusion length: 857.4mm
• DELTA_RADIUS: 170.99mm
• DELTA_DIAGONAL_ROD: 344.888mm
• DELTA vertical length: 299.516mm
• Delta_rod_angle: 60.2785mm when homed
• Build plate radius: 116.645mm (232mm diameter)
• Max Build Height: 377.421mm assuming a narrow tower or cone shaped build.

These are the base pieces


This is my redesigned carriage. Since I'm using printed sliders I wanted to move the pivot to the center of the block. These are as yet untested.


Sowing the top frame assembly


Showing the assemble bottom. Waiting on one more stepper damper to complete the base. I did braid and then sleeve my wires in Techflex (Carbon is the color name).

I'll update this post as I progress if the system allows ;)

-Jay